氧化物支持的氧化物纳米粒子具有强烈的金属氧化物支持相互作用,用于有效的酸氧演化反应
Hao Deng1, Chung-Li Dong2, Ta Thi Thuy Nga2
1International Research Center for Renewable Energy, State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China. shshen_xjtu@mail.xjtu.edu.cn.
Materials horizons
|September 30, 2025
概括
研究人员开发了一种新的催化剂 (IrO2/Co3O4),可以在质子交换膜水电解器 (PEMWE) 中加速酸氧演化反应 (OER) 的脱质化过程. 这提高了工业应用的催化剂性能和稳定性.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 催化剂是一种催化剂.
背景情况:
- 质子交换膜水电解器 (PEMWE) 需要高效的氧化演化反应 (OER) 催化剂,以适应酸性条件.
- 控制OER中的脱质化步骤对于改善催化剂活性和稳定性至关重要.
研究的目的:
- 开发一个高效和稳定的电催化剂酸性OER在PEMWE.
- 通过强金属氧化物支相互作用 (SMOSI) 了解和调节去质子化过程.
主要方法:
- 通过电替代,在Co3O4支 (IrO2/Co3O4) 上定超小的IrO2纳米颗粒的合成.
- 对酸性OER和PEMWE性能进行IrO2/Co3O4的电化学测试.
- 实验和理论计算以阐明SMOSI的机制.
主要成果:
- 对于具有>1000小时稳定性的酸性OER,IrO2/Co3O4表现出较低的超电位 (256 mV在10 mA cm-2).
- 一个带有IrO2/Co3O4阳极的PEMWE在0.5 A cm-2下稳定运行120小时,在1 A cm-2下稳定运行40小时.
- SMOSI增强了桥接氧气位点的p波段中心,促进了脱质和改善了OER动力学.
结论:
- 强金属氧化物支相互作用是一种有效的策略,用于调节酸性OER中的deprotonation过程.
- 对于工业级PEMWE来说,IrO2/Co3O4催化剂表现出极好的活性和耐用性.
- 这项工作为设计用于水电解的经济高效和高性能电催化剂提供了一种新方法.
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