期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
Ag/MoO2/MWCNTs纳米复合材料的制备及其催化氧还原性能 认领 引用 被引量:1
1
作者 林立光 孟阿兰 《青岛科技大学学报(自然科学版)》 CAS 2020年第1期57-63,96,共7页
采用水热法制备MoO2/MWCNTs,再通过紫外还原将银纳米颗粒沉积于其表面,成功制备了Ag/MoO2/MWCNTs复合材料。系统研究了合成条件对Ag/MoO2/MWCNTs的催化性能的影响。采用循环伏安法(CV)、线性扫描伏安法(LCV)及计时电流法(I-t)对Ag/MoO2/... 采用水热法制备MoO2/MWCNTs,再通过紫外还原将银纳米颗粒沉积于其表面,成功制备了Ag/MoO2/MWCNTs复合材料。系统研究了合成条件对Ag/MoO2/MWCNTs的催化性能的影响。采用循环伏安法(CV)、线性扫描伏安法(LCV)及计时电流法(I-t)对Ag/MoO2/MWCNTs复合材料的电催化氧还原(ORR)性能及其催化氧还原稳定性进行了研究。结果表明,制备Ag/MoO2/MWCNTs的优选工艺条件为:合成MoO2/MWCNTs的反应温度为160℃,反应时间为6 h,MoO2(acac)2与MWCNTs的质量比为1∶1,AgNO3用量为200μL每1 mg MoO2/MWCNTs(20 mg·mL^-1)。优选条件下制备的Ag/MoO2/MWCNTs催化氧还原(ORR)为4电子催化过程,其起始电位为0.923 V,极限电流密度为6.34 mA·cm^-2,半波电位为0.81 V,经过15000 s后,催化活性仍高于90.5%。 展开更多
关键词 Ag/MoO2/MWCNTs复合材料 燃料电池 电催化 氧还原反应
暂未订购 下载PDF
Oxygen-induced contact evolution enables friction reduction in MoS2/Ag composite films 认领 引用
2
作者 Xiaoyan Ma Qing Gao +5 位作者 Zhenrong Gao Xin Fan Min Yang Shunhua Wang Siming Ren Jibin Pu 《Friction》 SCIE EI CAS CSCD 2026年第3期153-163,共11页
Molybdenum disulfide(MoS2)is widely utilized as alubricant in aerospace,machinery,and electronics applicationsbecause of its unique layered structure and interlayer slipcharacteristics.Understanding the tribologica... Molybdenum disulfide(MoS2)is widely utilized as alubricant in aerospace,machinery,and electronics applicationsbecause of its unique layered structure and interlayer slipcharacteristics.Understanding the tribological behavior of MoS2-basedfilms under various atmospheric conditions,including oxidizing andspecialized atmospheres,is crucial for developing environmentallyadaptive lubricants.Here,we fabricated pure MoS2and Ag-dopedMoS2/Ag composite films via magnetron sputtering,focusing on theirtribological performance in argon,CO2,and O2atmospheres.Ourresults demonstrate that the friction coefficients of both films in argonand CO2are comparable to those in vacuum,with these environmentspromoting the formation of a continuous tribofilm on the counterpartball surface,thereby reducing the wear rates.Remarkably,in an oxygen environment,the MoS2/Ag composite film results in a~50%reduction in the friction coefficient(0.027)and a threefold decrease in the wear rate compared with vacuum conditions.Thisexceptional performance is attributed to the friction-induced metal oxide nanoparticles coated with Ag,which form a“brick‒mud”structure that slides with MoS2(002)nanosheets to achieve low friction and wear.Furthermore,the addition of Ag enhances theability of the film to repair sliding interfaces,mitigating abrasive wear.Our study elucidates the mechanisms driving the low-frictionbehavior of MoS2-based films in atmospheric environments,offering valuable insights for the development of high-performancelubricants for extreme conditions. 展开更多
关键词 MoS2/Ag composite film oxidizing gas friction and wear Ag-coated MoO3 structure
暂未订购 下载PDF
上一页 1 下一页 到第
在线咨询 使用帮助 返回顶部 意见反馈