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B‐Site Cation Ordered Double Perovskites as Efficient and Stable Electrocatalysts for Oxygen Evolution Reaction
Author(s) -
Sun Hainan,
Chen Gao,
Zhu Yinlong,
Liu Bo,
Zhou Wei,
Shao Zongping
Publication year - 2017
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201700507
Subject(s) - oxygen evolution , perovskite (structure) , catalysis , materials science , cobalt , water splitting , oxygen , chemical engineering , inorganic chemistry , chemistry , electrochemistry , crystallography , electrode , biochemistry , organic chemistry , photocatalysis , engineering
Simple disordered perovskite oxides have been intensively exploited as promising electrocatalysts for the oxygen evolution reaction (OER) towards their application in water splitting, reversible fuel cells, and rechargeable metal‐air batteries. Here, the B‐site cation‐ordered double perovskites Ba 2 Bi x Sc 0.2 Co 1.8− x O 6−δ , with two types of cobalt local environments, are demonstrated to be superior electrocatalysts for OER in alkaline solution, demonstrating ultrahigh catalytic activity. In addition, no obvious performance degradation is observed for the Ba 2 Bi 0.1 Sc 0.2 Co 1.7 O 6−δ sample after a continuous chronopotentiometry test. The critical role of the ordered [Co 2+ ] and [Sc 3+ , Bi 5+ , Co 3+ ] dual environments in improving OER activity is exhibited. These results indicate that B‐site cation‐ordered double perovskite oxides may represent a new class of promising electrocatalysts for the OER in sustainable energy storage and conversion systems.