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. Issue 1 (28th October 2021)

• Record Type: Journal Article
• Authors: Cheng, J.; Ganesan, P.; Wang, Z.; Zhang, M.; Zhang, G.; Maeda, N.; Matsuda, J.; Yamauchi, M.; Chi, B.; Nakashima, N.
• Is Part Of: Materials advances. Volume 3:Issue 1(2022)
• Page Start: 272
• Page End: 281
• Publication Date: 2021-10-28
• Subjects: 620.11
• DOI: 10.1039/d1ma00632k
• Languages: English
• ISSNs: 2633-5409

Abstract

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. 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, La0.8 Sr0.2 CoO3 −δ (LSC) was selected as a base perovskite oxide for doping different elements into its B-site to fabricate four different La0.8 Sr0.2 Co0.8 M0.2 O3− δ (LSCM; M = Ni, Fe, Mn, and Cu) perovskite oxides. Among the catalysts tested with and without multi-walled carbon nanotubes (MWNTs), La0.8 Sr0.2 Co0.8 Fe0.2 O3− 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.