B-Site Cation Ordered Double Perovskites as Efficient and Stable Electrocatalysts for Oxygen Evolution Reaction

IF 3.9 2区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Chemistry - A European Journal Pub Date : 2017-03-02 DOI:10.1002/chem.201700507

Hainan Sun, Gao Chen, Yinlong Zhu, Bo Liu, Prof. Wei Zhou, Prof. Zongping Shao

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引用次数: 56

Abstract

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 Ba₂Bi_xSc_0.2Co_1.8−xO_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 Ba₂Bi_0.1Sc_0.2Co_1.7O_6−δ sample after a continuous chronopotentiometry test. The critical role of the ordered [Co²⁺] and [Sc³⁺, Bi⁵⁺, Co³⁺] 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.

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b位阳离子有序双钙钛矿作为析氧反应高效稳定的电催化剂

简单无序钙钛矿氧化物作为析氧反应(OER)的电催化剂，在水分解、可逆燃料电池和可充电金属-空气电池中有广泛的应用前景。结果表明，b位阳离子有序双钙钛矿Ba2BixSc0.2Co1.8−xO6−δ具有两种钴局部环境，是碱性溶液中OER的优良电催化剂，具有超高的催化活性。此外，经过连续时间电位测试后，Ba2Bi0.1Sc0.2Co1.7O6−δ样品的性能没有明显下降。结果表明，有序的[Co2+]和[Sc3+， Bi5+， Co3+]双环境对OER活性的提高具有重要作用。这些结果表明，b位阳离子有序双钙钛矿氧化物可能是一种新的有前途的电催化剂，用于可持续能源存储和转换系统的OER。

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来源期刊

Chemistry - A European Journal 化学-化学综合

CiteScore

7.90

自引率

4.70%

发文量

1808

审稿时长

1.8 months

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