Advanced High Entropy Perovskite Oxide Electrocatalyst for Oxygen Evolution Reaction

Thi Xuyen Nguyen, Yi Cheng Liao, Chia Chun Lin, Yen Hsun Su, Jyh Ming Ting

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159 Citations (Scopus)


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.

Original languageEnglish
Article number2101632
JournalAdvanced Functional Materials
Issue number27
Publication statusPublished - 2021 Jul 2

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics


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