期刊
ADVANCED FUNCTIONAL MATERIALS
卷 31, 期 27, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.202101632
关键词
high entropy perovskite‐ oxides; non‐ equimolar concentration; oxygen evolution reaction
类别
资金
- Ministry of Science and Technology in Taiwan [MOST 108-2218-E-006-023, MOST 109-2224-E-006-007]
A new type of lanthanum-based high entropy perovskite oxide (HEPO) electrocatalyst for the oxygen evolution reaction has been reported. The HEPOs with B-site lattices consisting of five consecutive first-row transition metals exhibit excellent OER electrocatalytic performance, with La(CrMnFeCo2Ni)O-3 HEPO showing outstanding OER overpotential and electrochemical stability.
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)O-3 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.
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