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Tailoring twisted WS2 structure with strain-self-relaxation for ultra-high capacity potassium ion batteries 认领 引用
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作者 Yongpeng Cui Wenting Feng +9 位作者 Lina Ge Xinru Wei Lingmei Wang Yajun Wang Chong Xu Yuting Wang Wang Yang Debin Kong Wei Xing Yongfeng Li 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第3期319-327,共9页
The structural stress/strain induced by K-ion intercalation remains a critical challenge for K-ion batteries.To address this,a dopamine-intercalated WS2 hybrid(Dam-WS1.87)with a unique strain-self-relaxation archit... The structural stress/strain induced by K-ion intercalation remains a critical challenge for K-ion batteries.To address this,a dopamine-intercalated WS2 hybrid(Dam-WS1.87)with a unique strain-self-relaxation architecture was fabricated.Interestingly,the WS2 matrix undergoes a structural transformation owing to the intense infiltration effect of dopamine molecules,expanding interlayer spacing(0.813 nm)and introducing 6.5%S-vacancies while preserving high compaction density(4.0874 gcm-3).The engineered structure demonstrates remarkable mechanical stability,exhibiting only 19.0%crystallite expansion upon full potassiation(vs.101.3%for pristine WS2),demonstrating efficient strain alleviation through its strain-self-relaxation architecture.As a result,Dam-WS1.87delivers reversible capacities of 312.6 m A h g-1/1277.7 mA h cm-3at 0.125 C,along with superior rate capability(maintaining 210.4 m A h g-1at 5 C)and unprecedented cycling stability(85.3%capacity retention after 1400 cycles at 1 C).This work provides new insights into designing strain-tolerant electrode materials for nextgeneration energy storage systems. 展开更多
关键词 Potassium ion battery Volume expansion Strain-self-relaxation Dopamine WS2
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Sulfate-doped NiOOH-Ni(OH)2 nanosheet array for industrial co-production of hydrogen and potassium diformate 认领 引用
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作者 Xinyi Zhao Jun Hu +9 位作者 Liting Du Zhixiang Yuan Juncai Fei Fei Zhang Xinyu Sheng Hao Chen Shanqing Li Min Lv Nan Chen Ping Chen 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第2期560-568,I0013,共9页
Electrocatalytic water splitting for green hydrogen is hindered by the slow oxygen evolution reaction(OER).Replacing OER with ethylene glycol oxidation(EGOR)offers an energy-saving route,coproducing valuable chemicals... Electrocatalytic water splitting for green hydrogen is hindered by the slow oxygen evolution reaction(OER).Replacing OER with ethylene glycol oxidation(EGOR)offers an energy-saving route,coproducing valuable chemicals,but requires efficient,stable,and low-cost catalysts.Here,we report a sulfate-doped NiOOH-Ni(OH)2catalyst(denoted S-NiOOH-Ni(OH)2).SO42-doping significantly boosts intrinsic activity,enabling exceptional EGOR performance(only 1.45 V for~650 mA cm-2).In situ studies reveal that a unique"structural locking"effect stabilizes the highly activeβ-NiOOH phase within the composite,differing from conventional reconstruction.Notably,we successfully scaled up this catalyst to an industrial-scale electrolyzer(anode area:1386 cm2)and constructed an integrated electrochemical-conventional chemical coupling system,which stably produced 290 L of hydrogen and kilogram-scale high-purity potassium diformate(KDF)per batch.Techno-economic analysis confirms strong commercial viability,projecting$7.1 million annual profit and a payback period under one year.This work bridges advanced catalyst design to industrial biomass valorization coupled with hydrogen production. 展开更多
关键词 Ethylene glycol oxidation Potassium diformate Hydrogen evolution Sulfate-doped NiOOH-Ni(OH)2 Industrial production
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Promoting effect of potassium over Pd/SiO2 catalyst for ambient formaldehyde oxidation 认领 引用
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作者 Xiaofeng Liu Chunying Wang +2 位作者 Xudong Chen Jingyi Wang Yaobin Li 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2025年第6期29-38,共10页
Highly dispersed noble metals are acknowledged for its pivotal role in influencing the efficiency of catalysts during the HCHO oxidation process.Interestingly,in this work,an innovative approach was employed to augmen... Highly dispersed noble metals are acknowledged for its pivotal role in influencing the efficiency of catalysts during the HCHO oxidation process.Interestingly,in this work,an innovative approach was employed to augmenting the stabilization of noble metals on irreducible carriers supported noble metal catalyst(Pd/SiO2)by adding alkali metal potassium(K).A formidable promotion effect was observed when the K doping to Pd/SiO2 catalysts.It achieves a conversion rate of 93%for 270 ppmV of HCHO to harmless CO2 and H2O at a weight hourly space velocity(WHSV)of 300,000 mL/(g·hr)at 25℃.Multiple characterization results illustrated that a strong interaction between added K and Pd species was formed after K addition,which not only stabilized Pd species on the carrier surface but alsomarkedly enhanced its dispersal on the SiO2 carrier.The increasing Pd dispersion induced more oxygen vacancies on the surfaces of the Pd/SiO2 catalysts.The formation of these oxygen vacancies can be attributed to the phenomenon of hydrogen spillover,which also contributed to elevating the electron density on the Pd sites.Meanwhile,the oxygen vacancies favored the O2 activation to formmore reactive oxygen species participating in the HCHO oxidation reaction,thus improving the performance of Pd/SiO2 catalysts displayed for HCHO oxidation.This study provides a simple strategy to design high-performance irreducible carriers supported noble metal catalysts for HCHO catalytic oxidation. 展开更多
关键词 Alkali metal potassium Pd/SiO2 Reactive oxygen species Formaldehyde catalytic oxidation
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纳米TiO2对全水性环氧树脂防水涂料性能的影响 认领 引用
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作者 王志强 廖国胜 +3 位作者 廖宜顺 梅军鹏 刘帆 陈乐舟 《广州化学》 CAS 2026年第4期84-88,I0004,共5页
以水性环氧树脂为基础原料,通过加入不同添加量的金红石型纳米TiO2、水性环氧固化剂及消泡剂等助剂,制备一种改性全水性环氧树脂防水涂料。研究了纳米TiO2添加量对防水涂料初始粘度、固含量、干燥时间、抗冲击性、柔韧性、铅笔硬度等性... 以水性环氧树脂为基础原料,通过加入不同添加量的金红石型纳米TiO2、水性环氧固化剂及消泡剂等助剂,制备一种改性全水性环氧树脂防水涂料。研究了纳米TiO2添加量对防水涂料初始粘度、固含量、干燥时间、抗冲击性、柔韧性、铅笔硬度等性能的影响。并对全水性环氧树脂防水涂料涂层进行标准养护、浸水、浸碱、浸酸、冻融循环、热老化、紫外线试验,测试其拉伸粘结强度及耐候性。同时采用扫描电镜(SEM)观察了不同TiO2添加量下防水涂料的涂层表面微观形貌。结果表明,纳米TiO2的加入对涂料的综合性能均有不同程度的提高,当纳米TiO2添加量为树脂质量的3%时,综合性能达到最佳。 展开更多
关键词 纳米TiO2 全水性环氧树脂 防水涂料 吸水率 拉伸强度 耐候性
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Au负载量对TiO2/Au光阳极光吸收能力的影响研究 认领 引用
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作者 聂宗昊 闫伯涵 +1 位作者 祝孝栋 李秀玉 《应用物理》 2026年第5期456-464,共9页
为了研究Au负载量对TiO2/Au光阳极的光吸收能力的影响,本文采用水热法和柠檬酸钠还原法制备了TiO2/Au材料,通过刮涂法制备光阳极。利用紫外–可见吸收、X射线衍射(XRD)、透射电子显微镜(TEM)等手段对不同Au负载量的TiO2/Au材料和TiO2/A... 为了研究Au负载量对TiO2/Au光阳极的光吸收能力的影响,本文采用水热法和柠檬酸钠还原法制备了TiO2/Au材料,通过刮涂法制备光阳极。利用紫外–可见吸收、X射线衍射(XRD)、透射电子显微镜(TEM)等手段对不同Au负载量的TiO2/Au材料和TiO2/Au光阳极进行表征分析。结果表明,Au负载量在1.0 wt%时,TiO2/Au光阳极的光吸收能力最佳;低于1.0 wt%时,Au负载量提高,TiO2/Au光阳极的光吸收能力也随之提高;高于1.0 wt%时,Au负载量提高,TiO2/Au光阳极的光吸收能力随之降低。 展开更多
关键词 光阳极 TiO2 Au纳米颗粒 N719染料
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NiO修饰梯度对金红石相TiO2基MEMS氢敏传感器性能的优化研究 认领 引用
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作者 刘锦涛 鲍钰文 李晓博 《材料科学》 2026年第1期129-136,共8页
针对金红石相TiO2氢敏传感器存在的响应不足及选择性差的问题,本研究通过构建p-n异质结,开发了一种高性能的氢敏材料。采用水热法制备了不同NiO修饰量(1%~8%)的TiO2复合粉末,借助XPS、SEM等表征手段分析其结构形貌,并结合MEMS微热板器... 针对金红石相TiO2氢敏传感器存在的响应不足及选择性差的问题,本研究通过构建p-n异质结,开发了一种高性能的氢敏材料。采用水热法制备了不同NiO修饰量(1%~8%)的TiO2复合粉末,借助XPS、SEM等表征手段分析其结构形貌,并结合MEMS微热板器件测试气敏性能。结果表明,2% NiO修饰样品在391˚C下对1000 ppm氢气的响应值为金红石相TiO2的1.5倍,且对乙醇、CO等干扰气体具有优异选择性。本研究为高性能氢敏传感器的开发提供了有效的材料优化策略。 展开更多
关键词 金红石TiO2 NiO修饰梯度 P-N异质结 氢气传感 MEMS传感器 气敏机理
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激光粒度仪测疏水型TiO2粒径的研究 认领 引用
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作者 相阳 田晨毅 +2 位作者 金园平 束阳 潘媛媛 《广州化工》 CAS 2026年第16期118-121,140,共4页
粒径分布是影响钛白粉应用性能最重要的指标之一,然而疏水型钛白粉因为它的表面经过有机处理,在水中分散困难,极易团聚,给激光粒度仪粒径测试带来巨大挑战。本研究选用不同的分散介质和分散剂,在浓度、超声分散及其他测试条件都相同的... 粒径分布是影响钛白粉应用性能最重要的指标之一,然而疏水型钛白粉因为它的表面经过有机处理,在水中分散困难,极易团聚,给激光粒度仪粒径测试带来巨大挑战。本研究选用不同的分散介质和分散剂,在浓度、超声分散及其他测试条件都相同的情况下,采用Bettersize3000激光粒度仪进行对比实验,以粒径分布图的峰型、粒径平均值(D50)、粒度分布,结合TEM透射电镜对测试结果进行评价。结果表明,以无水乙醇为分散介质,并加入适量的BYK-111分散剂,超声分散5 min,有效的破坏疏水型钛白粉的团聚体,获得分散良好、重复性高的粒径测试结果,可为企业开展品质管控及产品研发提供更好的技术支持。 展开更多
关键词 Bettersize3000激光粒度仪 TiO2粒度分布 分散剂 影响因素
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TiO2光催化技术处理印染废水的研究进展 认领 引用 被引量：10
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作者 任敬 宗刚 +1 位作者 谢涛 景张欣 《化工新型材料》 CAS CSCD 北大核心 2025年第3期83-87,共5页
综述了二氧化钛(TiO2)光催化技术处理印染废水的研究进展,重点介绍了TiO2材料的改性方法,主要包括掺杂改性、材料负载、光敏化及半导体材料复合改性,并讨论了不同改性方法对TiO2结构和性能的影响。在此基础上,对TiO2光催化... 综述了二氧化钛(TiO2)光催化技术处理印染废水的研究进展,重点介绍了TiO2材料的改性方法,主要包括掺杂改性、材料负载、光敏化及半导体材料复合改性,并讨论了不同改性方法对TiO2结构和性能的影响。在此基础上,对TiO2光催化技术处理印染废水的研究前景进行了展望。 展开更多
关键词 印染废水 TiO2改性 光催化
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Enhancing Alkaline Hydrogen Evolution Reaction on Ru- Decorated TiO2 Nanotube Layers: Synergistic Role of Ti3+, Ru Single Atoms, and Ru Nanoparticles 认领 引用 被引量：2
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作者 Sitaramanjaneya Mouli Thalluri Jhonatan Rodriguez-Pereira +7 位作者 Jan Michalicka Eva Kolíbalová Ludek Hromadko Stanislav Slang Miloslav Pouzar Hanna Sopha Raul Zazpe Jan M.Macak 《Energy & Environmental Materials》 SCIE EI CAS CSCD 2025年第3期191-198,共8页
Synergistic interplays involving multiple active centers originating from TiO2 nanotube layers(TNT)and ruthenium(Ru)species comprising of both single atoms(SAs)and nanoparticles(NPs)augment the alkaline hydrogen evolu... Synergistic interplays involving multiple active centers originating from TiO2 nanotube layers(TNT)and ruthenium(Ru)species comprising of both single atoms(SAs)and nanoparticles(NPs)augment the alkaline hydrogen evolution reaction(HER)by enhancing Volmer kinetics from rapid water dissociation and improving Tafel kinetics from efficient H*desorption.Atomic layer deposition of Ru with 50 process cycles results in a mixture of Ru SAs and 2.8-0.4 nm NPs present on TNT layers,and it emerges with the highest HER activity among all the electrodes synthesized.A detailed study of the Ti and Ru species using different high-resolution techniques confirmed the presence of Ti3+states and the coexistence of Ru SAs and NPs.With insights from literature,the role of Ti3+,appropriate work functions of TNT layers and Ru,and the synergistic effect of Ru SAs and Ru NPs in improving the performance of alkaline HER were elaborated and justified.The aforementioned characteristics led to a remarkable performance by having 9mV onset potentials and 33 mV dec-1 of Tafel slopes and a higher turnover frequency of 1.72 H2 s-1 at 30 mV.Besides,a notable stability from 28 h staircase chronopotentiometric measurements for TNT@Ru surpasses TNT@Pt in comparison. 展开更多
关键词 alkaline hydrogen evolution reaction ruthenium nanoparticles ruthenium single atoms TiO2 nanotube layers water dissociation
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三维TiO2/石墨烯气凝胶的自组装制备及其电容性能 认领 引用 被引量：1
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作者 王艳坤 张建民 王一帆 《化工新型材料》 CAS CSCD 北大核心 2025年第12期96-102,115,共7页
将氧化石墨烯纳米片与Ti(OH)4纳米颗粒通过溶胶静电自组装,然后水热还原和真空冷冻干燥处理制备了三维分层结构的TiO2/还原氧化石墨烯气凝胶(TGAs)。通过X射线衍射、热重、傅里叶变换红外光谱、拉曼光谱、X射线光电子能谱、氮气吸附... 将氧化石墨烯纳米片与Ti(OH)4纳米颗粒通过溶胶静电自组装,然后水热还原和真空冷冻干燥处理制备了三维分层结构的TiO2/还原氧化石墨烯气凝胶(TGAs)。通过X射线衍射、热重、傅里叶变换红外光谱、拉曼光谱、X射线光电子能谱、氮气吸附脱附实验、场发射扫描电镜和透射电镜对其微观结构、组成和形貌进行了表征。采用循环伏安、恒流充放电、电化学阻抗谱和循环稳定性等电化学方法对其超级电容性能进行了评估。结构分析显示TGAs呈现典型的三维分级多孔结构及具有高比表面积(287.4m2/g)。在1mol/L Na2SO4电解液中,该材料在扫速为5mV/s时表现出高达268.3F/g的比电容。此外,该材料还表现出优异的循环稳定性,经3000次循环后比电容保持率仍保持在93%左右,表明其在高性能超级电容器电极材料方面具有良好的应用前景。 展开更多
关键词 TiO 2 石墨烯 气凝胶 静电自组装 超级电容器
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包覆TiO2保护层抑制磷化镍钴在水中腐蚀 认领 引用 被引量：1
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作者 杨博 吕功煊 马建泰 《无机化学学报》 SCIE CAS CSCD 北大核心 2025年第2期365-384,共20页
本工作研究了镍钴双金属磷化物(Ni-Co-P)在水溶液中的稳定性。结果显示,Ni-Co-P能与H2O反应,发生自腐蚀生成Ni2+、Co2+和PO43-离子,同时产生H2。Ni-Co-P与H2O的自腐蚀反应速率受到镍钴比例影响,Ni-Co-P中的Co含量升高,... 本工作研究了镍钴双金属磷化物(Ni-Co-P)在水溶液中的稳定性。结果显示,Ni-Co-P能与H2O反应,发生自腐蚀生成Ni2+、Co2+和PO43-离子,同时产生H2。Ni-Co-P与H2O的自腐蚀反应速率受到镍钴比例影响,Ni-Co-P中的Co含量升高,其在水中的腐蚀速率降低。详细研究了镍、钴投料比(nNiCo)为1∶2制备的Ni-Co-P在水中的腐蚀行为,其在水中的腐蚀速率与溶液pH值、氧气含量、光照、温度等因素有关。为了抑制Ni-Co-P(nNiCo=1/2)在水溶液中的腐蚀,在其表面包裹一层惰性TiO2保护层,这层TiO2保护层能有效减缓Ni-Co-P在水中的腐蚀,增强其稳定性。 展开更多
关键词 双金属磷化物 水溶液 稳定性 TiO2保护层
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Modification of CeO2-ZrO2catalyst by potassium for NOx-assisted soot oxidation 认领 引用 被引量：11
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作者 Duan Weng Jia Li +1 位作者 Xiaodong Wu Zhichun Si 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2011年第1期145-150,共6页
Potassium-modified ceria-zirconia catalyst was synthesized by wetness impregnation method.The ageing treatment was performed in static air at 800℃for 20 hr to evaluate the thermal stability of the catalyst.The cataly... Potassium-modified ceria-zirconia catalyst was synthesized by wetness impregnation method.The ageing treatment was performed in static air at 800℃for 20 hr to evaluate the thermal stability of the catalyst.The catalysts were characterized by X-ray diffraction,BET surface area,oxygen storage capacity,NOx-temperature programmed desorption and soot-temperature programmed oxidation measurements.By introduction of potassium,the maximum soot oxidation rate temperature(Tin)of the ceria-zirconia based catalyst decreased from 525 to 428℃in the presence of NO under a loose contact mode.The shift of Tm of the K-modified catalyst after ageing is only 15℃.The enhanced activity of the aged catalyst mainly lies in the promotional effect of potassium on the NOx/oxygen storage capacity as well as the soot-catalyst contact. 展开更多
关键词 CeO2-ZrO2 mixed oxides potassium soot combustion NOx storage oxygen storage capacity
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Catalytic decomposition of N2O over potassium-modified Cu-Co spinel oxides 认领 引用 被引量：21
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作者 DOU Zhe ZHANG Hai-jie +1 位作者 PAN Yan-fei XU Xiu-feng 《燃料化学学报》 CSCD 北大核心 2014年第2期238-245,共8页
Cu-Co spinel oxides with different compositions were prepared for N2O catalytic decomposition in the presence ofoxygen.The active catalyst of Cu0.8Co0.2Co2O4was incipiently impregnated by alkali metal s... Cu-Co spinel oxides with different compositions were prepared for N2O catalytic decomposition in the presence ofoxygen.The active catalyst of Cu0.8Co0.2Co2O4was incipiently impregnated by alkali metal salt solutions to prepare the modifiedcatalysts.These catalysts were characterized by BET,XRD,SEM and XPS techniques,and their catalytic activity for N2Odecomposition was tested.The effect of alkali metal species,potassium precursors and potassium loadings on catalytic activity wasinvestigated.It was found that the catalytic activity of Cu0.8Co0.2Co2O4modified by K2CO3was much higher than that of bareoxide,while Cs/Cu0.8Co0.2Co2O4was inferior to Cu0.8Co0.2Co2O4for N2O decomposition.In the case of K/Cu0.8Co0.2Co2O4withdifferent potassium precursors,the catalyst activity was largely enhanced by the addition of K2CO3,while the doping of KNO3and CH3COOK notably depressed the catalytic activity.Over the optimal catalyst of 0.05K/Cu0.8Co0.2Co2O4,100%and 87.6%conversion of N2O was reached at 400℃under the atmosphere of oxygen only and oxygen-steam together,respectively.Inaddition,K2CO3-modified catalyst in both reaction atmospheres showed higher stability than un-modified catalyst. 展开更多
关键词 catalytic decomposition of N2O Cu-Co mixed oxides potassium additive catalytic activity
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Effects of Potassium and Manganese Promoters on Nitrogen-Doped Carbon Nanotube-Supported Iron Catalysts for CO_2 Hydrogenation 认领 引用 被引量：6
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作者 Praewpilin Kangvansura Ly May Chew +6 位作者 Chanapa Kongmark Phatchada Santawaja Holger Ruland Wei Xia Hans Schulz Attera Worayingyong Martin Muhler 《Engineering》 SCIE EI CAS 2017年第3期385-392,共8页
Nitrogen-doped carbon nanotubes （NCNTs） were used as a support for iron （Fe） nanoparticles applied in car- bon dioxide （CO_2） hydrogenation at 633 K and 25 bar （1 bar = 10-5 Pa）. The Fe/NCNT catalyst promoted ... Nitrogen-doped carbon nanotubes （NCNTs） were used as a support for iron （Fe） nanoparticles applied in car- bon dioxide （CO_2） hydrogenation at 633 K and 25 bar （1 bar = 10-5 Pa）. The Fe/NCNT catalyst promoted with both potassium （K） and manganese （Mn） showed high performance in CO_2 hydrogenation, reaching 34.9% conversion with a gas hourly space velocity （GHSV） of 3.1 L-（g·h）-1. Product selectivities were high for olefin products and low for short-chain alkanes for the K-promoted catalysts. When Fe/NCNT catalyst was promot- ed with both K and Mn, the catalytic activity was stable for 60 h of reaction time. The structural effect of the Mn promoter was demonstrated by X-ray diffraction （XRD）, temperature-programmed reduction （TPR） with molecular hydrogen （H2）, and in situ X-ray absorption near-edge structure （XANES） analysis. The Mn pro- moter stabilized wtistite （FeO） as an intermediate and lowered the TPR onset temperature. Catalytic ammo- nia （NH_3） decomposition was used as an additional probe reaction for characterizing the promoter effects. The Fe/NCNT catalyst promoted with both K and Mn had the highest catalytic activity, and the Mn-promoted Fe/NCNT catalysts had the highest thermal stability under reducing conditions. 展开更多
关键词 CO_2 hydrogenation Iron catalyst Nitrogen-doped carbon nanotubes Manganese promoter Potassium promoter
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Effect of manganese and potassium addition on CeO_2-Al_2O_3 catalyst for hydrogenation of benzoic acid to benzaldehyde 认领 引用 被引量：3
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作者 程党国 侯春阳 +1 位作者 陈丰秋 詹晓力 《Journal of Rare Earths》 SCIE EI CAS 2009年第5期723-727,共5页
A series of Mn/CeO2-Al2O3 and K/CeO2-Al2O3 catalysts for hydrogenation of benzoic acid to benzaldehyde were prepared to in- vestigate the effect of Mn, K addition on CeO2-Al2O3 catalyst. X-ray diffraction (XRD) and H2... A series of Mn/CeO2-Al2O3 and K/CeO2-Al2O3 catalysts for hydrogenation of benzoic acid to benzaldehyde were prepared to in- vestigate the effect of Mn, K addition on CeO2-Al2O3 catalyst. X-ray diffraction (XRD) and H2-temperature-programmed reduction (H2-TPR) results suggested that the interaction between CeO2 and MnOx enhanced the reducibility of catalysts and therefore benzoic acid conversion. The addition of K increased the number of basic number on the catalyst which leads to a high selectivity to benzaldehyde, but excessive addition imposed negative effects on the catalyst performance. A Mn-K/CeO2-Al2O3 catalyst was developed and investigated in the reaction. The simultaneous addition of Mn and K enhanced not only the catalytic activity but also the capacity to resist the coke formation over catalyst. 展开更多
关键词 benzaldehyde benzoic acid CeO2 manganese potassium rare earths
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CO_2 absorption into a phase change absorbent: Water-lean potassium prolinate/ethanol solution 认领 引用 被引量：9
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作者 Yangyang Bian Shufeng Shen 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2018年第11期2318-2326,共9页
Phase change solvents are attractive energy-efficient absorbents for carbon dioxide(CO_2) capture due to CO_2-rich phase formation. Potassium prolinate + water + ethanol(ProK/W/Eth) solution has shown good capture cha... Phase change solvents are attractive energy-efficient absorbents for carbon dioxide(CO_2) capture due to CO_2-rich phase formation. Potassium prolinate + water + ethanol(ProK/W/Eth) solution has shown good capture characteristics as a promising one in our previous work. In this work, absorption rate of CO_2, solubility of N2 O,and heat of absorption for ProK/W/Eth solution were investigated using a stirred cell reactor and a CPA201 reaction calorimeter and these results were also compared with the aqueous ProK and 30 mass% MEA solutions.Using ethanol as a solvent can substantially increase the CO_2 physical solubility and the absorption rate of CO_2 in ProK/W/Eth solutions is far higher than that in aqueous 30 mass% MEA solutions especially at a low CO_2 loading range. Solid precipitation, obtained from the liquid-to-solid phase change absorption, was analyzed by13 C NMR and DSC-TGA. The enthalpy change for ProK/W/Eth solutions at various CO_2 loading was also discussed. 展开更多
关键词 CO2 absorption Phase change absorbent Potassium prolinate Ethanol Heat of absorption
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Study of(e,2e) process on potassium at 6 e V-60 eV above threshold in a second-order Born approximation 认领 引用 被引量：5
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作者 王旸 周雅君 焦利光 《Chinese Physics B》 SCIE EI CAS CSCD 2012年第8期197-201,共5页
The standard distorted wave Born approximation （DWBA） method has been extended to second-order Born amplitude in order to describe the multiple interactions between the projectile and the atomic target. Second-order... The standard distorted wave Born approximation （DWBA） method has been extended to second-order Born amplitude in order to describe the multiple interactions between the projectile and the atomic target. Second-order DWBA calculations have been preformed to investigate the triple differential cross sections （TDCS） of coplanar doubly symmetric （e, 2e） collisions for the alkali target potassium at excess energies of 6 eV-60 eV. Compared with the previous first-order DWBA calculations, the present theoretical model improves the degree of agreement with experiments, especially for the backward scattering angle region of TDCS. This indicates that the present second-order Born term is capable of giving a reasonable correction to the DWBA model in studying coplanar symmetric （e, 2e） problems in low and intermediate energy ranges. 展开更多
关键词 second-order Born approximation （e 2e） collisions potassium triple differential cross section
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Potassium iodide catalyzed reductive dehalogenation ofα-halo-ketones using Hantzsch ester diethyl 1,4-dihydro-2,6-dimethylpyridine-3,5-dicarboxylate as reductant 认领 引用 被引量：2
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作者 Hong Sheng Li Yi Qun Li 《Chinese Chemical Letters》 SCIE CAS 2010年第8期931-934,共4页
In the presence of diethyl 1,4-dihydro-2,6-dimethylpyridine-3,5-dicarboxylate(DHP)and a catalytic amount of potassium iodide,severalα-halo ketones were easily reduced to the corresponding ketones in acetone media.The... In the presence of diethyl 1,4-dihydro-2,6-dimethylpyridine-3,5-dicarboxylate(DHP)and a catalytic amount of potassium iodide,severalα-halo ketones were easily reduced to the corresponding ketones in acetone media.The procedure presented here showed several merits such as short reaction time,practical experimental and isolated procedure,and excellent yields of products. 展开更多
关键词 Dehalogenation α-Halo ketones Hantzsch ester 1 4-Dihydro-2 6-dimethylpyridine-3 5-dicarboxylate Potassium iodide
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液相法制备TiO2薄膜光阳极及其光电化学阴极保护性能 认领 引用
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作者 姚权桐 胡素影 +3 位作者 王志有 程俊霞 王翠苹 冯云会 《辽宁科技大学学报》 CAS 2025年第3期177-184,203,共8页
为了研究不同相态TiO2薄膜的光电化学阴极保护性能,本文通过在不同温度下焙烧TiO2前驱体液态薄膜,获得锐钛矿和金红石两种相态TiO2薄膜,并系统对比两种相态薄膜的光电化学阴极保护性能。实验结果表明,锐钛矿相TiO2薄膜在紫... 为了研究不同相态TiO2薄膜的光电化学阴极保护性能,本文通过在不同温度下焙烧TiO2前驱体液态薄膜,获得锐钛矿和金红石两种相态TiO2薄膜,并系统对比两种相态薄膜的光电化学阴极保护性能。实验结果表明,锐钛矿相TiO2薄膜在紫外光谱区和可见光谱区的吸收能力均优于金红石相TiO2薄膜,且具有更低的载流子复合率。在白光辐照下,锐钛矿相TiO2薄膜可使304不锈钢开路电位负移至-0.95 V,金红石相TiO2薄膜可使开路电位负移至-0.75 V,为锐钛矿相TiO2薄膜的76%。锐钛矿相TiO2薄膜产生的光电流密度约为0.13 mA/cm2,金红石相TiO2薄膜产生的光电流密度约为0.10 mA/cm2,为锐钛矿相TiO2薄膜的76.9%。 展开更多
关键词 TiO2光阳极 液相法 锐钛矿相 金红石相 光电化学阴极保护
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Enhanced CO oxidation over potassium-promoted Pt/Al_2O_3 catalysts:Kinetic and infrared spectroscopic study 认领 引用 被引量：1
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作者 刘欢欢 贾爱平 +2 位作者 王瑜 罗孟飞 鲁继青 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2015年第11期1976-1986,共11页
A series of K-promoted Pt/Al2O3 catalysts were tested for CO oxidation. It was found that the addition of K significantly enhanced the activity. A detailed kinetic study showed that the activation energies of the K-co... A series of K-promoted Pt/Al2O3 catalysts were tested for CO oxidation. It was found that the addition of K significantly enhanced the activity. A detailed kinetic study showed that the activation energies of the K-containing catalysts were lower than those of the K-free ones, particularly for catalysts with high Pt contents （51.6 k）/mol for 0.42K-2.0Pt/Al2O3 and 6：3.6 kJ/mol for 2.0Pt/Al2O3 ）. The CO reaction orders were higher for the K-containing catalysts （about -0.2） than for the K-free ones （about -0.5）, with the former having much lower equilibrium constants for CO adsorption than the latter. In situ Fourier-transform infrared spectroscopy showed that surface CO desorption from the 0.42K-2.0Pt/Al2O3 catalyst was easier than from 2.0Pt/Al2O3. The promoting effect of K was therefore caused by weakening of the interactions between CO and surface Pt atoms. This decreased coverage of the catalyst with CO and facilitated competitive O2 chemisorption on the Pt surface, and significantly lowered the reaction barrier between chemisorbed CO and O2 species. 展开更多
关键词 CO oxidation Potassium Kinetics Pt/Al2O3 catalyst Promoting effect
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