SrNb(0.1)Co(0.7)Fe(0.2)O(3-δ) perovskite as a next-generation electrocatalyst for oxygen evolution in alkaline solution

Yinlong Zhu; Wei Zhou; Zhi-Gang Chen; Yubo Chen; Chao Su; Moses O Tadé; Zongping Shao

doi:10.1002/anie.201408998

SrNb(0.1)Co(0.7)Fe(0.2)O(3-δ) perovskite as a next-generation electrocatalyst for oxygen evolution in alkaline solution

Angew Chem Int Ed Engl. 2015 Mar 23;54(13):3897-901. doi: 10.1002/anie.201408998. Epub 2015 Feb 4.

Authors

Yinlong Zhu¹, Wei Zhou, Zhi-Gang Chen, Yubo Chen, Chao Su, Moses O Tadé, Zongping Shao

Affiliation

¹ State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry & Chemical Engineering, Nanjing Tech University, No. 5 Xin Mofan Road, Nanjing 210009 (P.R. China).

PMID: 25653050
DOI: 10.1002/anie.201408998

Abstract

The perovskite SrNb0.1 Co0.7 Fe0.2 O3-δ (SNCF) is a promising OER electrocatalyst for the oxygen evolution reaction (OER), with remarkable activity and stability in alkaline solutions. This catalyst exhibits a higher intrinsic OER activity, a smaller Tafel slope and better stability than the state-of-the-art precious-metal IrO2 catalyst and the well-known BSCF perovskite. The mass activity and stability are further improved by ball milling. Several factors including the optimized eg orbital filling, good ionic and charge transfer abilities, as well as high OH(-) adsorption and O2 desorption capabilities possibly contribute to the excellent OER activity.

Keywords: energy storage and conversion; intrinsic activity; oxygen evolution reaction; perovskites.