Local Surface Structure and Composition Control the Hydrogen Evolution Reaction on Iron Nickel Sulfides

Cameron L. Bentley; Corina Andronescu; Mathias Smialkowski; Minkyung Kang; Tsvetan Tarnev; Bernd Marler; Patrick R. Unwin; Ulf Peter Apfel; Wolfgang Schuhmann

doi:10.1002/anie.201712679

Local Surface Structure and Composition Control the Hydrogen Evolution Reaction on Iron Nickel Sulfides

Cameron L. Bentley, Corina Andronescu, Mathias Smialkowski, Minkyung Kang, Tsvetan Tarnev, Bernd Marler, Patrick R. Unwin, Ulf Peter Apfel, Wolfgang Schuhmann

Research output: Contribution to journal › Article › Research › peer-review

81 Citations (Scopus)

Abstract

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 Fe_4.5Ni_4.5S₈, 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.

Original language	English
Pages (from-to)	4093-4097
Number of pages	5
Journal	Angewandte Chemie - International Edition
Volume	57
Issue number	15
DOIs	https://doi.org/10.1002/anie.201712679
Publication status	Published - 3 Apr 2018
Externally published	Yes

Keywords

electrocatalysis
hydrogen evolution reaction
iron nickel sulfides
SECCM
surfaces

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10.1002/anie.201712679

Cite this

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abstract = "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.",

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AU - Bentley, Cameron L.

AU - Andronescu, Corina

AU - Smialkowski, Mathias

AU - Kang, Minkyung

AU - Tarnev, Tsvetan

AU - Marler, Bernd

AU - Unwin, Patrick R.

AU - Apfel, Ulf Peter

AU - Schuhmann, Wolfgang

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Y1 - 2018/4/3

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AB - 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.

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Local Surface Structure and Composition Control the Hydrogen Evolution Reaction on Iron Nickel Sulfides

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Keywords

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