固体溶液纳米电催化剂具有卓越的活性和优良的耐久性,用于酸性介质中的氧气演化反应
Jianren Kuang1, Binglu Deng2, Zhongqing Jiang3
1Guangzhou Key Laboratory for Surface Chemistry of Energy Materials, Guangdong Engineering and Technology Research Center for Surface Chemistry of Energy Materials, College of Environment and Energy, South China University of Technology, Guangzhou, 510006, P. R. China.
Advanced materials (Deerfield Beach, Fla.)
|December 22, 2023
概括
这项研究介绍了碳纳米管上的Sr-doped氧化物纳米粒子,作为在酸性介质中氧化演化反应 (OER) 的高效和稳定的催化剂,大大减少了的使用.
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:
- 在酸性介质中开发成本有效的氧化演化反应 (OER) 催化剂对于能源应用至关重要.
- 基于的催化剂有效但昂贵,推动了对替代品和改进配方的研究.
研究的目的:
- 开发和描述使用少量的酸性OER的新型,高活性和稳定的催化剂.
- 调查影响催化性能的结构和电子特性.
主要方法:
- 在碳纳米管 (Sr-IrMnO2/CNTs) 上合成超细Sr-doped固体溶液IrMnO2纳米颗粒.
- 在酸性介质中对OER活性和稳定性的电化学测试.
- 密度函数理论 (DFT) 计算以了解催化机制.
主要成果:
- Sr-IrMnO2/CNTs对酸性OER具有高的催化活性和稳定性,表现优于商业的IrO2.
- 在3.5倍低的Ir剂量下,获得了236.0mV的超电位10.0mAcm-2时.
- 在1.53V时,与IrO2相比,显示出39.6倍高的Ir质量活性.
- 在水电解剂和质子交换膜水电解剂中具有出色的耐用性 (>400小时) 和性能.
结论:
- 固体溶液结构和Sr-IrMnO2中的Sr-doping是高催化活性和稳定性的关键.
- DFT计算证实了OER的增强电子合和降低能源障碍.
- 氧化兴奋剂提高了对耐腐蚀和脱金属化的稳定性,这对于酸性环境至关重要.
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