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

IF 4.3 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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模板辅助构建用于高效酸性析氧反应的掺钼二氧化钌空心纳米球

为了提高水电解的整体效率，迫切需要开发具有增强酸性析氧反应活性和耐久性的非铱基电催化剂。本研究采用模板辅助法制备了一种高效的钛负载mo掺杂RuO2空心纳米球电催化剂（Mox-RuO2/Ti）。在10 mA cm−2电流密度下，Mo0.25-RuO2/Ti电催化剂表现出优异的OER催化活性，最小过电位为175 mV，在酸性条件下保持400 h的电化学稳定性，明显优于商用RuO2/Ti催化剂。基于实验结果和理论计算，这种令人印象深刻的OER性能源于空心球形纳米结构的高暴露活性位点和Mo掺杂诱导的Ru活性位点的电子调制的协同效应。本研究强调了一种设计高活性和稳定的酸性OER电催化剂的有效方法。

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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.