title: B-Site Cation Ordered Double Perovskites as Efficient and Stable Electrocatalysts for Oxygen Evolution Reaction.
abstract: Simple disordered perovskite oxides have been intensively exploited as promising electrocatalysts for the oxygen evolution reaction (OER) towards their application in water splitting, reversible fuel cells, and rechargeable metal-air batteries. Here, the B-site cation-ordered double perovskites Ba2BixSc0.2Co1.8-xO6-δ, with two types of cobalt local environments, are demonstrated to be superior electrocatalysts for OER in alkaline solution, demonstrating ultrahigh catalytic activity. In addition, no obvious performance degradation is observed for the Ba2Bi0.1Sc0.2Co1.7O6-δsample after a continuous chronopotentiometry test. The critical role of the ordered [Co2+] and [Sc3+, Bi5+, Co3+] dual environments in improving OER activity is exhibited. These results indicate that B-site cation-ordered double perovskite oxides may represent a new class of promising electrocatalysts for the OER in sustainable energy storage and conversion systems.
authors.affiliation: Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, No.5 Xin Mofan Road, Nanjing, 210009, P. R. China.
authors.forename: Hainan
authors.initials: H
authors.lastname: Sun
authors.affiliation: Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, No.5 Xin Mofan Road, Nanjing, 210009, P. R. China.
authors.forename: Gao
authors.initials: G
authors.lastname: Chen
authors.affiliation: Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, No.5 Xin Mofan Road, Nanjing, 210009, P. R. China.
authors.forename: Yinlong
authors.initials: Y
authors.lastname: Zhu
authors.affiliation: Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, No.5 Xin Mofan Road, Nanjing, 210009, P. R. China.
authors.forename: Bo
authors.initials: B
authors.lastname: Liu
authors.affiliation: Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, No.5 Xin Mofan Road, Nanjing, 210009, P. R. China.
authors.forename: Wei
authors.identifier: http://orcid.org/0000-0003-0322-095X
authors.initials: W
authors.lastname: Zhou
authors.affiliation: Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, No.5 Xin Mofan Road, Nanjing, 210009, P. R. China.|School of Energy and Engineering, Nanjing Tech University, No.30 South Puzhu Road, Nanjing, 210009, P. R. China.|Department of Chemical Engineering, Curtin University, Perth, Western Australia, 6845, Australia.
authors.forename: Zongping
authors.initials: Z
authors.lastname: Shao
keywords: alkaline media; cation order; double perovskite; electrochemistry; oxygen evolution reaction; water splitting