{"title":"In-situ construction of CeO2–Co3O4 heterostructure on nickel foam for efficient oxygen evolution reaction","authors":"Yushi Guo, Yaxuan Chen, Chen Wang, Guolin Zhang, Qiuhua Wu","doi":"10.1016/j.jssc.2025.125209","DOIUrl":null,"url":null,"abstract":"<div><div>The creation and fabrication of inexpensive and efficacious catalysts for the oxygen evolution reaction (OER) hold great significance for advancing water electrolysis technology. In this study, CeO<sub>2</sub> and Co<sub>3</sub>O<sub>4</sub> heterostructure was synthesized in situ on nickel foam using a two-step electrodeposition process followed by calcination, and it was used as the electrode material for OER. The material exhibits a low overpotential of 284 mV at a current density of 10 mA cm<sup>−2</sup> and a small Tafel slope of 35.5 mV dec<sup>−1</sup>. The enhanced activity of the composite is attributed to rapid charge transfer and the synergistic effect between Co and Ce metal oxides. Meanwhile, the composite exhibits great stability in alkaline electrolyte.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"344 ","pages":"Article 125209"},"PeriodicalIF":3.5000,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Solid State Chemistry","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0022459625000325","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2025/1/15 0:00:00","PubModel":"Epub","JCR":"Q2","JCRName":"CHEMISTRY, INORGANIC & NUCLEAR","Score":null,"Total":0}
引用次数: 0
Abstract
The creation and fabrication of inexpensive and efficacious catalysts for the oxygen evolution reaction (OER) hold great significance for advancing water electrolysis technology. In this study, CeO2 and Co3O4 heterostructure was synthesized in situ on nickel foam using a two-step electrodeposition process followed by calcination, and it was used as the electrode material for OER. The material exhibits a low overpotential of 284 mV at a current density of 10 mA cm−2 and a small Tafel slope of 35.5 mV dec−1. The enhanced activity of the composite is attributed to rapid charge transfer and the synergistic effect between Co and Ce metal oxides. Meanwhile, the composite exhibits great stability in alkaline electrolyte.
期刊介绍：
Covering major developments in the field of solid state chemistry and related areas such as ceramics and amorphous materials, the Journal of Solid State Chemistry features studies of chemical, structural, thermodynamic, electronic, magnetic, and optical properties and processes in solids.
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