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Stannites – A New Promising Class of Durable Electrocatalysts for Efficient Water Oxidation
Author(s) -
Hausmann J. Niklas,
Heppke Eva M.,
BeltránSuito Rodrigo,
Schmidt Johannes,
Mühlbauer Martin,
Lerch Martin,
Menezes Prashanth W.,
Driess Matthias
Publication year - 2020
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201901705
Subject(s) - oxygen evolution , electrocatalyst , water splitting , catalysis , chalcogen , materials science , chemistry , chemical engineering , transition metal , noble metal , inorganic chemistry , electrochemistry , electrode , organic chemistry , photocatalysis , engineering
The oxygen evolution reaction (OER) through water oxidation is a key process for multiple energy storage technologies required for a sustainable energy economy such as the formation of the fuel hydrogen from water and electricity, or metal‐air batteries. Herein, we investigate the suitability of Cu 2 FeSnS 4 for the OER and demonstrate its superiority over iron sulfide, iron (oxy)hydroxides and benchmark noble‐metal catalysts in alkaline media. Electrodeposited Cu 2 FeSnS 4 yields the current densities of 10 and 1000 mA/cm 2 at overpotentials of merely 228 and 330 mV, respectively. State‐of‐the‐art analytical methods are applied before and after electrocatalysis to uncover the fate of the Cu 2 FeSnS 4 precatalyst under OER conditions and to deduce structure‐activity relationships. Cu 2 FeSnS 4 is the first compound reported for OER among the broad class of stannite structure type materials containing multiple members with highly active earth‐abundant transition‐metals for OER.