Nb掺杂SnO2负载RuO2酸性析氧催化剂的制备和性能

陈思璐; 李丽; 雷霆

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

粉末冶金材料科学与工程 >

2026 , Vol. 31 >Issue 3: 297 - 309

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

工艺技术

Nb掺杂SnO₂负载RuO₂酸性析氧催化剂的制备和性能

陈思璐 ,
李丽 ,
雷霆

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中南大学粉末冶金研究院,长沙 410083

收稿日期: 2026-03-03

修回日期: 2026-03-23

网络出版日期: 2026-07-03

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Preparation and performance of Nb-doped SnO₂ supported RuO₂ acidic oxygen evolution catalysts

CHEN Silu ,
LI Li ,
LEI Ting

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Powder Metallurgy Research Institute, Central South University, Changsha 410083, China

Received date: 2026-03-03

Revised date: 2026-03-23

Online published: 2026-07-03

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摘要

本文通过两步水热法结合煅烧工艺,设计并合成了Nb掺杂SnO₂负载RuO₂纳米颗粒的Nb-SnO₂@RuO₂催化剂。采用扫描电子显微镜、高分辨透射电子显微镜、X射线衍射仪以及电化学测试等分析表征手段,研究了催化剂的微观结构和电化学性能。结果表明：Nb-SnO₂载体具有由薄纳米片组装而成的独特三维花状分级结构,这为RuO₂的高分散提供了巨大的比表面积;RuO₂活性物质与Nb-SnO₂载体之间存在显著的电子相互作用和电荷重分布,Nb-SnO₂@RuO₂催化剂在0.5 mol/L H₂SO₄电解液中表现出卓越的析氧反应催化活性,在10 mA/cm²电流密度下仅需195 mV的过电位,Tafel斜率为49.47 mV/dec,显著低于商业RuO₂。此外,该催化剂在连续工作50 h后无明显性能衰减,表现出良好的长期稳定性。Nb-SnO₂@RuO₂催化剂中Ru含量仅为0.151 mg/cm²,表现出350.86 mA/mg的质量比活性。本研究为开发可持续能源转换技术中的先进贵金属基酸性析氧催化剂提供了一种可行的策略。

关键词： 二氧化锡; 二氧化钌; 酸性析氧反应; 水热反应; 稳定性

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陈思璐 , 李丽 , 雷霆 . Nb掺杂SnO₂负载RuO₂酸性析氧催化剂的制备和性能[J]. 粉末冶金材料科学与工程, 2026 , 31(3) : 297 -309 . DOI: 10.19976/j.cnki.43-1448/TF.2026025

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

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