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Advanced High Entropy Perovskite Oxide Electrocatalyst for Oxygen Evolution Reaction
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2021-05-05 , DOI: 10.1002/adfm.202101632
Thi Xuyen Nguyen, Yi-Cheng Liao, Chia-Chun Lin, Yen-Hsun Su, Jyh-Ming Ting

A new type of lanthanum-based high entropy perovskite oxide (HEPO) electrocatalyst for the oxygen evolution reaction is reported. The B-site lattices in the HEPO consist of five consecutive first-row transition metals, including Cr, Mn, Fe, Co, and Ni. Equimolar and five non-equimolar HEPO electrocatalysts are studied for their OER electrocatalytic performance. In the five non-equimolar HEPOs, the concentration of one of the five transition metals is doubled in individual samples. The performances of all the HEPOs outperform the single perovskite oxides. The optimized La(CrMnFeCo2Ni)O3 HEPO exhibits an outstanding OER overpotential of 325 mV at a current density of 10 mA cm−2 and excellent electrochemical stability after 50 h of testing.

中文翻译:

用于析氧反应的高级高熵钙钛矿氧化物电催化剂

报道了一种用于析氧反应的新型镧基高熵钙钛矿氧化物(HEPO)电催化剂。HEPO 中的 B 位晶格由五种连续的第一行过渡金属组成,包括 Cr、Mn、Fe、Co 和 Ni。研究了等摩尔和五种非等摩尔 HEPO 电催化剂的 OER 电催化性能。在五个非等摩尔 HEPO 中,五个过渡金属之一的浓度在单个样品中加倍。所有 HEPO 的性能均优于单一钙钛矿氧化物。优化后的 La(CrMnFeCo 2 Ni)O 3 HEPO 在 10 mA cm -2的电流密度下表现出 325 mV 的出色 OER 过电位和经过 50 小时测试后的优异电化学稳定性。
更新日期:2021-07-04
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