Citation: Yuanjun LIU, Jiayang JIANG, Rui WANG, Jiangnan HU, Chaoyi YUAN, Xingmei GUO, Junhao ZHANG, Guoxing ZHU. Crystallinity and oxidation degree tuning of Ru for alkaline hydrogen oxidation[J]. Chinese Journal of Inorganic Chemistry, ;2026, 42(9): 1933-1944. doi: 10.11862/CJIC.20250373 shu

Crystallinity and oxidation degree tuning of Ru for alkaline hydrogen oxidation

Yuanjun LIU ¹ ,
Jiayang JIANG ¹ ,
Rui WANG ^2,, ,
Jiangnan HU ¹ ,
Chaoyi YUAN ¹ ,
Xingmei GUO ¹ ,
Junhao ZHANG ¹ ,
Guoxing ZHU ^{2, 3,,}

1.
School of Chemistry and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212013, China
2.
Heilongjiang Key Laboratory of Photoelectric Functional Materials, College of Chemistry and Chemical Engineering, Mudanjiang Normal University, Mudanjiang, Heilongjiang 157011, China
3.
School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China

Corresponding author: Rui WANG, 674722166@qq.com Guoxing ZHU, zhuguoxing@ujs.edu.cn
Received Date: 15 December 2025
Revised Date: 15 May 2026

Figures(7)

Developing high-performance electrocatalysts for the alkaline hydrogen oxidation reaction (HOR) is essential for advancing alkaline hydrogen fuel cells. Here, we report the synthesis of ruthenium (Ru) catalysts with tuned crystallinity and oxidation degree. By combining template-assisted synthesis with controlled thermal treatment, amorphous, partially crystalline, highly crystalline, and partially oxidized Ru products were successfully obtained. Catalysts with moderate crystallinity and partial oxidation exhibit enhanced catalytic activity toward the alkaline hydrogen oxidation reaction. The optimized Ru-RuO₂ catalyst achieved a mass activity of 81.66 mA·mg_Ru^-1, which was 2.27 times that of commercial Pt/C under identical conditions. The improved activity is attributed to the synergistic effect of moderate crystallinity and partial oxidation, which favors a favorable Tafel-Volmer reaction pathway.
- hydrogen oxidation,
- Ru catalyst,
- crystallinity,
- fuel cells,
- catalytic activity
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