调节氧化的压力和电子结构支持IRO 电催化剂,用于高效的氧气进化反应在酸性氧化物中
Weiwei Han1, Xinuo Cai1, Jiahong Liao1
1Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, Zhejiang Province 310058, China.
ACS applied materials & interfaces
|August 30, 2024
概括
这项研究引入了一种新的以为的氧化电催化剂,用于水电解中的氧化演化反应,实现高活性和稳定性,以有效生产气.
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:
- 质子交换膜水电解是产生的关键,但受到慢氧演化反应 (OER) 动力学的限制.
- 氧化 (IrO2) 是酸性OER的基准电催化剂,但在提高其活性和商业用途的稳定性方面仍然存在挑战.
研究的目的:
- 开发一种高活性和稳定的以为基础的电催化剂,用于酸氧演化反应.
- 调查兴奋剂和双边界对电催化剂性能的影响.
主要方法:
- 在氧化物 (TB-Ru0.3Ir0.7O2@ITO) 上支持丰富的双边界的氧化物纳米颗粒的合成.
- 酸性OER性能催化剂的电化学表征,包括超电位和质量活性测量.
- 电催化剂的长期稳定性测试.
- 密度函数理论 (DFT) 计算以阐明活动增强的机制.
主要成果:
- TB-Ru0.3Ir0.7O2@ITO催化剂在10 mA cm-2时显示出203 mV的低超电位,在1.53 V和RHE时显示出854.45 A g-1贵金属的高质量活性.
- 催化剂表现出优异的长期稳定性,在10 mA cm-2下保持了超过110小时的性能,并且可以忽略不计的停用.
- DFT的计算显示,Ru的兴奋剂和应变优化了氧中间体的d频段中心和吸附自由能量,增强了催化活性.
结论:
- 开发的具有双边界的Ru-doped IrO2电催化剂为高效和稳定的酸性OER提供了一个有前途的解决方案.
- 这项工作为优化电催化剂设计提供了洞察力,用于在水电解中高活性和稳定性之间的权衡.
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