催化作用
电化学
活动站点
材料科学
纳米材料
钼
无机化学
电催化剂
电极
硫化氢
纳米技术
化学
硫化物
化学工程
物理化学
有机化学
硫黄
冶金
工程类
作者
Jesse D. Benck,Thomas R. Hellstern,Jakob Kibsgaard,Pongkarn Chakthranont,Thomas F. Jaramillo
摘要
We discuss recent developments in nanostructured molybdenum sulfide catalysts for the electrochemical hydrogen evolution reaction. To develop a framework for performing consistent and meaningful comparisons between catalysts, we review standard experimental methodologies for measuring catalyst performance and define two metrics used in this perspective for comparing catalyst activity: the turnover frequency, an intrinsic activity metric, and the total electrode activity, a device-oriented activity metric. We discuss general strategies for synthesizing catalysts with improved activity, namely, increasing the number of electrically accessible active sites or increasing the turnover frequency of each site. Then we consider a number of state-of-the-art molybdenum sulfide catalysts, including crystalline MoS2, amorphous MoSx, and molecular cluster materials, to highlight these strategies in practice. Comparing these catalysts reveals that most of the molybdenum sulfide catalysts have similar active site turnover frequencies, so the total electrode activity is primarily determined by the number of accessible active sites per geometric electrode area. Emerging strategies to overcome current catalyst limitations and potential applications for molybdenum sulfide catalysts including photoelectrochemical water splitting devices and electrolyzers are also considered.
科研通智能强力驱动
Strongly Powered by AbleSci AI