Bifunctional electrochemical properties of La0.8Sr0.2Co0.8M0.2O3-: δ (M = Ni, Fe, Mn, and Cu): Efficient elemental doping based on a structural and pH-dependent study

J. Cheng, P. Ganesan, Z. Wang, M. Zhang, G. Zhang, N. Maeda, J. Matsuda, M. Yamauchi, B. Chi, N. Nakashima

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

Perovskite oxides with a low cost and high catalytic activity are considered as suitable candidates for the oxygen evolution reaction (OER)/oxygen reduction reaction (ORR), but most of them favour only either the ORR or the OER. Besides, their underlying catalytic mechanisms are subject of an ongoing debate. Herein, La0.8Sr0.2CoO3-δ (LSC) was selected as a base perovskite oxide for doping different elements into its B-site to fabricate four different La0.8Sr0.2Co0.8M0.2O3-δ (LSCM; M = Ni, Fe, Mn, and Cu) perovskite oxides. Among the catalysts tested with and without multi-walled carbon nanotubes (MWNTs), La0.8Sr0.2Co0.8Fe0.2O3-δ (LSCF) outperformed any other catalysts in terms of both OER and ORR activity. The OER/ORR activity enhancement with LSCF is also discussed based on spectroscopic and microscopic analyses and lattice oxygen transportation.

Original languageEnglish
Pages (from-to)272-281
Number of pages10
JournalMaterials Advances
Volume3
Issue number1
DOIs
Publication statusPublished - Jan 7 2022

All Science Journal Classification (ASJC) codes

  • Chemistry (miscellaneous)
  • General Materials Science

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