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Preparation and Application of Supported Amorphous Alloy Catalyst CoP/TiO_2 认领 引用 被引量：3
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作者 韩长秀 任吉丽 张宝贵 《Transactions of Tianjin University》 EI CAS 2008年第1期73-77,共5页
A new supported amorphous catalyst CoP/TiO2 was prepared by chemical reduction and characterized by ICP, XRD, TEM, BET and DSC. Its application in decomposing PH3 to high purity phosphor and its catalytic activity wer... A new supported amorphous catalyst CoP/TiO2 was prepared by chemical reduction and characterized by ICP, XRD, TEM, BET and DSC. Its application in decomposing PH3 to high purity phosphor and its catalytic activity were studied. The decomposition rate is over 95% at 450 ℃. For comparison, unsupported CoP amorphous catalyst was prepared by the same method. The result suggests that CoP/TiO2 exhibits higher thermal stability and catalytic activity than CoP, which is attributed to the high dispersion of CoP alloy particles on the support-TiO2. 展开更多
关键词 CoP amorphous catalyst CoP/TiO2 supported catalyst phosphine
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CO_2 methanation over TiO_2–Al_2O_3 binary oxides supported Ru catalysts 认领 引用 被引量：3
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作者 Jinghua Xu Qingquan Lin +3 位作者 Xiong Su Hongmin Duan Haoran Geng Yanqiang Huang 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2016年第1期140-145,共6页
TiO_2 modified Al_2O_3 binary oxide was prepared by a wet-impregnation method and used as the support for ruthenium catalyst. The catalytic performance of Ru/TiO_2–Al_2O_3catalyst in CO_2 methanation reaction was inv... TiO_2 modified Al_2O_3 binary oxide was prepared by a wet-impregnation method and used as the support for ruthenium catalyst. The catalytic performance of Ru/TiO_2–Al_2O_3catalyst in CO_2 methanation reaction was investigated. Compared with Ru/Al_2O_3 catalyst, the Ru/TiO_2–Al_2O_3catalytic system exhibited a much higher activity in CO_2 methanation reaction. The reaction rate over Ru/TiO_2–Al_2O_3 was 0.59 mol CO_2·(g Ru)1·h-1, 3.1 times higher than that on Ru/Al_2O_3[0.19 mol CO_2·(gRu)-1·h-1]. The effect of TiO_2 content and TiO_2–Al_2O_3calcination temperature on catalytic performance was addressed. The corresponding structures of each catalyst were characterized by means of H_2-TPR, XRD, and TEM. Results indicated that the averaged particle size of the Ru on TiO_2–Al_2O_3support is 2.8 nm, smaller than that on Al_2O_3 support of 4.3 nm. Therefore, we conclude that the improved activity over Ru/TiO_2–Al_2O_3catalyst is originated from the smaller particle size of ruthenium resulting from a strong interaction between Ru and the rutile-TiO_2 support, which hindered the aggregation of Ru nanoparticles. 展开更多
关键词 CO2 methanation Supported Ru catalyst TiO2–Al2O3 binary oxide
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Ultrafine Pt nanoparticles supported on double-shelled C/TiO2 hollow spheres material as highly efficient methanol oxidation catalysts 认领 引用 被引量：8
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作者 Xiaoyu Yue Yuguang Pu +2 位作者 Wen Zhang Ting Zhang Wei Gao 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2020年第10期275-282,共8页
Catalyst support is extremely important for future fuel cell devices.In this work,we developed doubleshelled C/TiO2(DSCT)hollow spheres as an excellent catalyst support via a template-directed method.The combination o... Catalyst support is extremely important for future fuel cell devices.In this work,we developed doubleshelled C/TiO2(DSCT)hollow spheres as an excellent catalyst support via a template-directed method.The combination of hollow structure,TiO2 shell and carbon layer results in excellent electron conductivity,electrocatalytic activity,and chemical stability.These uniformed DSCT hollow spheres are used as catalyst support to synthesize Pt/DSCT hollow spheres electrocatalyst.The resulting Pt/DSCT hollow spheres exhibited high catalytic performance with a current density of 462 mA mg^-1 for methanol oxidation reaction,which is 2.52 times higher than that of the commercial Pt/C.Furthermore,the increased tolerance to carbonaceous poisoning with a higher If/Ibratio and a better long-term stability in acid media suggests that the DSCT hollow sphere is a promising C/TiO2-based catalyst support for direct methanol fuel cells applications. 展开更多
关键词 Catalyst support C/TiO2 hollow sphere Metal-support interactions Methanol oxidation reaction
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Corrigendum to “TiO2 supported cobalt-manganese nano catalysts for light olefins production from syngas” [Journal of Energy Chemistry22(4)(2013) 645–652] 认领 引用 被引量：1
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作者 Mostafa Feyzi Asadollah Hassankhani 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2019年第12期275-275,共1页
关键词 TiO2 supported cobalt-manganese nano catalysts for light olefins production from syngas Corrigendum to Journal of Energy Chemistry22
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TiO_2-AC催化剂的制备与处理染料废水的实验研究 认领 引用 被引量：3
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作者 刘树鑫 《供水技术》 2018年第6期22-25,共4页
采用溶胶-凝胶法制备二元复合光催化剂TiO_2-AC,在太阳光下对刚果红溶液模拟染料废水进行光催化反应实验,考察了新型光催化剂的催化活性,并通过XRD和SEM对复合催化剂进行表征。结果表明:TiO_2-AC催化活性较高并具有良好的处理效果,AC的... 采用溶胶-凝胶法制备二元复合光催化剂TiO_2-AC,在太阳光下对刚果红溶液模拟染料废水进行光催化反应实验,考察了新型光催化剂的催化活性,并通过XRD和SEM对复合催化剂进行表征。结果表明:TiO_2-AC催化活性较高并具有良好的处理效果,AC的加入减小了半导体复合体的禁带宽度,提高了光催化效率。TiO_2-AC的最佳复合质量比为1∶0. 01,以平均紫外光强为63. 81 W/m2照射120 min后,对刚果红染料废水的最高去除率可达96%。 展开更多
关键词 光催化 复合催化剂 TiO2-AC 刚果红
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双金属氧化物TiO_2基催化剂的氧化还原性能 认领 引用
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作者 张英华 刘振民 +2 位作者 卢海强 刘建红 王远洋 《工业催化》 CAS 2018年第2期39-47,共9页
以金属硝酸盐为前驱物,乙二胺四乙酸为助剂,采用正交实验设计和浸渍法制备Cu-Ni、Cu-Fe和Ni-Fe系列TiO_2基双金属氧化物催化剂,通过XRD和H_2-TPR进行表征,评价其氧化还原性能。结果表明,活性组分为Cu和Fe、物质的量比为0.2∶0.2、pH为8.... 以金属硝酸盐为前驱物,乙二胺四乙酸为助剂,采用正交实验设计和浸渍法制备Cu-Ni、Cu-Fe和Ni-Fe系列TiO_2基双金属氧化物催化剂,通过XRD和H_2-TPR进行表征,评价其氧化还原性能。结果表明,活性组分为Cu和Fe、物质的量比为0.2∶0.2、pH为8.0和400℃焙烧的5#催化剂具有优良的氧化还原性能,起始还原温度148℃条件下,耗氢量达80.72 mmol·g-1。活性组分、物质的量比、pH值和焙烧温度等催化剂制备参数影响氧化还原反应的难易(起始还原温度)和强弱(耗氢量),Cu和Fe物质的量比为0.2∶0.2的催化剂由于协同效应具有最低的起始还原温度和很高的耗氢量。较低物质的量比含Ni活性组分的催化剂由于形成复合金属氧化物固溶体而难以在较低温度被还原,中性或碱性条件下通过氢氧化物脱水生成金属氧化物有助于提高催化剂的耗氢量,400℃足以形成适宜的晶型以提高催化剂氧化还原性能。 展开更多
关键词 催化剂工程 正交实验设计 浸渍法 双金属氧化物TiO2基催化剂 氧化还原
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Improved performance of direct methanol fuel cells with the porous catalyst layer using highly-active nanofiber catalyst 认领 引用 被引量：4
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作者 Yosuke Tsukagoshi Hirokazu Ishitobi Nobuyoshi Nakagawa 《Carbon Resources Conversion》 EI 2018年第1期61-72,共12页
PtRu supported on TiO2-embedded carbon nanofibers(PtRu/TECNF),which was recently reported as a highly-active catalyst for methanol oxidation,was applied to a direct methanol fuel cell(DMFC),and the power generation pe... PtRu supported on TiO2-embedded carbon nanofibers(PtRu/TECNF),which was recently reported as a highly-active catalyst for methanol oxidation,was applied to a direct methanol fuel cell(DMFC),and the power generation performance was compared to that using the commercial PtRu/C.Before the comparison,the effect of the catalyst loading on the power density of the DMFC was investigated using PtRu(18 wt%)/TECNF.The DMFC power density showed a maximum at about a 1.5 mg cm2 PtRu loading that corresponds to about an 80 mm layer thickness.A catalyst layer thicker than this value reduced the power density probably due to the concentration overvoltage.The PtRu content in the PtRu/TECNF was then increased to 30 wt%or more to reduce the layer thickness and to increase the power density.The DMFC performance was compared to that of different anode catalysts at a 1 mg cm2 PtRu loading.The power density was maximized using the PtRu30 wt%/TECNF,which showed a 173 mW cm2 at 353 K and had 66 mm layer thick,that was 26%higher than that of commercial PtRu/C.The current–voltage curve of the DMFC with the PtRu/TECNF suggested an improved mass transport overvoltage,but a little improvement in the activation one despite using the catalyst with about a 2 times higher activity compared to that of the commercial PtRu/C.This was attributed to the lower Pt utilization of the nanofiber catalyst layer. 展开更多
关键词 Direct methanol fuel cell Catalyst layer structure PtRu catalyst TiO2-embedded carbon nanofiber support Methanol oxidation reaction Power density Precious metal loading Concentration overvoltage
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