Template-assisted construction of molybdenum-doped ruthenium dioxide hollow nanospheres for highly efficient acidic oxygen evolution reaction

IF 4.1 2区工程技术 Q2 ENGINEERING, CHEMICAL

Chemical Engineering Science Pub Date : 2025-02-17 DOI:10.1016/j.ces.2025.121389

Lin Zhang, Wenyuan Gao, Ziyao Liu, Man Luo, Yang Chen, Weiguang Zhang, Yibing Li, Jie Zhu

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Abstract

Developing non-iridium-based electrocatalysts with enhanced activity and durability for acidic oxygen evolution reaction (OER) is urgently demanded for the overall efficiency of water electrolysis. In this study, a highly efficient Ti-supported Mo-doped RuO₂ hollow nanosphere electrocatalyst (Mo_x-RuO₂/Ti) is fabricated by a template-assisted method. The resulting Mo_0.25-RuO₂/Ti electrocatalyst with appropriate Mo doping demonstrates exceptional OER catalytic activity with a minimal overpotential of 175 mV at a current density of 10 mA cm⁻² and maintains a remarkable electrochemical stability of 400 h in acidic conditions, significantly superior to the commercial RuO₂/Ti catalyst. Based on the experimental results and theoretical calculations, this impressive OER performance stems from the synergistic effects of the high exposure of the active sites by the hollow spherical nanostructure and the electronic modulation of Ru active sites induced by Mo doping. This study underscores an effective approach for designing highly active and stable RuO₂-based electrocatalysts for acidic OER.

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来源期刊

Chemical Engineering Science 工程技术-工程：化工

CiteScore

7.50

自引率

8.50%

发文量

1025

审稿时长

50 days

期刊介绍： Chemical engineering enables the transformation of natural resources and energy into useful products for society. It draws on and applies natural sciences, mathematics and economics, and has developed fundamental engineering science that underpins the discipline. Chemical Engineering Science (CES) has been publishing papers on the fundamentals of chemical engineering since 1951. CES is the platform where the most significant advances in the discipline have ever since been published. Chemical Engineering Science has accompanied and sustained chemical engineering through its development into the vibrant and broad scientific discipline it is today.