Local Surface Structure and Composition Control the Hydrogen Evolution Reaction on Iron Nickel Sulfides
| Autor: | Bernd Marler, Ulf-Peter Apfel, Corina Andronescu, Tsvetan Tarnev, Minkyung Kang, Patrick R. Unwin, Mathias Smialkowski, Cameron Luke Bentley, Wolfgang Schuhmann |
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| Přispěvatelé: | Publica |
| Rok vydání: | 2018 |
| Předmět: |
Materials science
chemistry.chemical_element 02 engineering and technology 010402 general chemistry Electrochemistry Electrocatalyst 01 natural sciences Catalysis law.invention Electrochemical cell SECCM law electrocatalysis surface QD Graphite Graphene iron nickel sulfide General Chemistry 021001 nanoscience & nanotechnology hydrogen evolution reaction 0104 chemical sciences Nickel chemistry Chemical engineering 0210 nano-technology Platinum |
| Zdroj: | Angewandte Chemie International Edition |
| ISSN: | 1433-7851 |
| Popis: | 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 Fe4.5Ni4.5S8, 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.\ud \ud |
| Databáze: | OpenAIRE |
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