Temperature-Induced Lattice Distortion in ZnCo2O4 for Improving Electrocatalytic Oxygen Evolution Reaction

• DOI: 10.1021/acssuschemeng.3c04832
• Publication Date: 2023-10-09T14:18:05Z
• Authors: Ming Ya; Yaowen Wang; Jianghao Wang; Guichen Gao; Xu Zhao; Yanhua Wei; Zhibin Geng; Guangshe Li; Liping Li
• Keywords: Oxygen evolution; Spin states

Spinel oxides exhibit considerable potential as electrocatalysts for the oxygen evolution reaction (OER) owing to their diverse surficial composition and electronic structure. Engineering spin state of metal ions has been acknowledged an effective approach improving OER activity. However, comprehensively understanding intricate connection between structure activity still poses challenges. In this study, we present a temperature-induced lattice distortion strategy manipulate spinel ZnCo2O4, resulting in remarkable performance toward OER. Experimental findings demonstrate that calcination temperature can precisely control CoO6 octahedra thus Co3+ ions. Magnetic analysis reveals ZnCo2O4 calcined at 300 °C consists with 64.4% high-spin 35.6% low-spin states, possessing favorable configuration exhibiting optimal We believe implementation provide valuable insights developing advanced oxide based on spin-state engineering.