镍
铂金
催化作用
电化学
材料科学
纳米尺度
合理设计
晶体结构
表征(材料科学)
纳米技术
化学工程
氢
化学
结晶学
冶金
电极
物理化学
有机化学
工程类
作者
Cameron Luke Bentley,Corina Andronescu,Mathias Smialkowski,Myunghee Kang,Tsvetan Tarnev,Bernd Marler,Patrick R. Unwin,Ulf‐Peter Apfel,Wolfgang Schuhmann
标识
DOI:10.1002/anie.201712679
摘要
In order to design more powerful electrocatalysts, developing our understanding of the role of the surface structure and composition of widely abundant bulk materials is crucial. This is particularly true in the search for alternative hydrogen evolution reaction (HER) catalysts to replace platinum. We report scanning electrochemical cell microscopy (SECCM) measurements of the (111)-crystal planes of Fe4.5 Ni4.5 S8 , a highly active HER catalyst. In combination with structural characterization methods, we show that this technique can reveal differences in activity arising from even the slightest compositional changes. By probing electrochemical properties at the nanoscale, in conjunction with complementary structural information, novel design principles are revealed for application to rational material synthesis.
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