泡沫镍上CeO2-Co3O4异质结构的原位构建及高效析氧反应

IF 3.2 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR Journal of Solid State Chemistry Pub Date : 2025-04-01 Epub Date: 2025-01-15 DOI:10.1016/j.jssc.2025.125209

Yushi Guo, Yaxuan Chen, Chen Wang, Guolin Zhang, Qiuhua Wu

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摘要

制备廉价高效的析氧反应催化剂，对推进水电解技术的发展具有重要意义。本研究采用电沉积-煅烧两步法在泡沫镍上原位合成了CeO2和Co3O4异质结构，并将其作为OER的电极材料。该材料在电流密度为10 mA cm−2时具有284 mV的低过电位和35.5 mV dec−1的小塔菲尔斜率。复合材料的活性增强是由于Co和Ce金属氧化物之间的快速电荷转移和协同作用。同时，该复合材料在碱性电解质中表现出良好的稳定性。

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In-situ construction of CeO2–Co3O4 heterostructure on nickel foam for efficient oxygen evolution reaction

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.

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来源期刊

Journal of Solid State Chemistry 化学-无机化学与核化学

CiteScore

6.00

自引率

9.10%

发文量

848

审稿时长

25 days

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.