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Microwave‐Assisted Synthesis of Stable and Highly Active Ir Oxohydroxides for Electrochemical Oxidation of Water
Author(s) -
Massué Cyriac,
Huang Xing,
Tarasov Andrey,
Ranjan Chinmoy,
Cap Sébastien,
Schlögl Robert
Publication year - 2017
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201601864
Subject(s) - oxygen evolution , electrocatalyst , calcination , water splitting , electrochemistry , materials science , anode , chemical engineering , hydrothermal circulation , hydrothermal synthesis , hydrogen production , catalysis , electrode , nanotechnology , inorganic chemistry , chemistry , photocatalysis , organic chemistry , engineering
Water splitting for hydrogen production in acidic media has been limited by the poor stability of the anodic electrocatalyst devoted to the oxygen evolution reaction (OER). To help circumvent this problem we have synthesized a class of novel Ir oxohydroxides by rapid microwave‐asisted hydrothermal synthesis, which bridges the gap between electrodeposited amorphous IrO x films and crystalline IrO 2 electrocatalysts prepared by calcination routes. For electrode loadings two orders of magnitude below current standards, the synthesized compounds present an unrivalled combination of high activity and stability under commercially relevant OER conditions in comparison to reported benchmarks, without need for pretreatment. The best compound achieved a lifetime 33 times longer than the best commercial Ir benchmark. Thus, the reported efficient synthesis of an Ir oxohydroxide phase with superior intrinsic OER performance constitutes a major step towards the targeted design of cost‐efficient Ir based OER electrocatalysts for acidic media.