Nb掺杂SnO<sub>2</sub>负载RuO<sub>2</sub>酸性析氧催化剂的制备和性能

doi:10.19976/j.cnki.43-1448/TF.2026025

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Abstract This study designed and synthesised a Nb-SnO₂@RuO₂ catalyst comprising Nb-doped SnO₂ loaded with RuO₂ nanoparticles via a two-step hydrothermal process combined with calcination. The microstructure and electrochemical performance of the catalyst were investigated using analytical and characterization methods such as scanning electron microscope, high-resolution transmission electron microscope, X-ray diffractometer, and electrochemical testing. Results indicate that the Nb-SnO₂ carrier exhibits a unique three-dimensional floral hierarchical structure assembled from thin nanosheets, providing substantial specific surface area for high RuO₂ dispersion. Significant electronic interactions and charge redistribution occur between the RuO₂ active substance and Nb-SnO₂ carrier. Nb-SnO₂@RuO₂ catalyst exhibits outstanding oxygen evolution reaction catalytic activity in 0.5 mol/L H₂SO₄ electrolyte, requiring only 195 mV overpotential at a current density of 10 mA/cm², with a Tafel slope of 49.47 mV/dec, significantly lower than commercial RuO₂. Moreover, the catalyst exhibits excellent long-term stability with no significant performance degradation after 50 h of continuous work. The Ru content in Nb-SnO₂@RuO₂ catalyst is merely 0.151 mg/cm², demonstrating a mass-specific activity of 350.86 mA/mg. This study provides a viable strategy for developing advanced precious-metal-based acidic oxygen evolution catalysts for sustainable energy conversion technologies.

Key words： SnO₂ RuO₂ acidic oxygen evolution reaction hydrothermal reaction stability

Received: 03 March 2026 Published: 03 July 2026

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	CHEN Silu
	LI Li
	LEI Ting

Cite this article:

CHEN Silu,LI Li,LEI Ting. Preparation and performance of Nb-doped SnO₂ supported RuO₂ acidic oxygen evolution catalysts[J]. Materials Science and Engineering of Powder Metallurgy, 2026, 31(3): 297-309.

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http://pmbjb.csu.edu.cn/EN/10.19976/j.cnki.43-1448/TF.2026025 OR http://pmbjb.csu.edu.cn/EN/Y2026/V31/I3/297

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