RuO2/CeO2 heterostructure anchored on carbon spheres as a bifunctional electrocatalyst for efficient water splitting in acidic media

被引：43

作者：

Wu, Yun ^{[1
]}

Yao, Rui ^{[1
]}

Zhang, Kaiyang ^{[1
]}

Zhao, Qiang ^{[1
]}

Li, Jinping ^{[1
]}

Liu, Guang ^{[1
]}

机构：

[1] Taiyuan Univ Technol, Coll Chem Engn & Technol, Shanxi Key Lab Gas Energy Efficient & Clean Utiliz, Taiyuan 030024, Shanxi, Peoples R China

来源：

CHEMICAL ENGINEERING JOURNAL | 2024年 / 479卷

基金：

中国国家自然科学基金;

关键词：

Oxygen evolution reaction; Hydrogen evolution reaction; Acidic media; Heterojunction; Ruthenium-based; Bifunctional electrocatalyst; OXYGEN EVOLUTION;

D O I：

10.1016/j.cej.2023.147939

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The use of proton exchange membrane (PEM) hydrolysis technology holds promise for eco-friendly hydrogen production using renewable energy sources. However, developing efficient, cost-effective, and durable bifunc-tional electrocatalysts for the acidic oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) remains challenging. Here, we synthesized RuO2/CeO2 heterojunction loaded on carbon spheres (RuO2/ CeO2@C) via hydrothermal and annealing techniques to address this issue. Our experiments demonstrate exceptional catalytic activity of RuO2/CeO2@C for both OER and HER, with overpotentials of 170 and 120 mV, respectively, at 10 mA/cm2 in 0.5 M H2SO4. Moreover, the electrocatalyst enables overall water splitting at 1.54 V and maintains stability for over 100 h at 10 mA/cm2. Density functional theory (DFT) calculations suggest that RuO2/CeO2 heterojunction modifies d-band center of Ru, balances H adsorption/desorption behavior, acceler-ates reaction kinetics, and lowers the energy barrier, thereby enhancing electrocatalytic activity. These findings provide valuable insights for future efficient bifunctional water splitting electrocatalyst design.

引用

页数：10

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