实现高活性和长期稳定,以实现CeO2-Ir之间的酸相合中氧的演变
Jianren Kuang1, Zhi Li1, Weiqiang Li2
1College of Environment and Energy, South China University of Technology, Guangzhou 510006, China.
Materials (Basel, Switzerland)
|November 14, 2023
概括
开发高效的催化剂是氧化演化反应 (OER) 的关键. 本研究介绍了碳纳米管上的CeO2-Ir异构连接,显示了酸性OER应用的优越活性和稳定性.
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:
- 有效和稳定的催化剂对于酸氧演化反应 (OER) 是至关重要的.
- 基于的催化剂是有效的,但往往需要高负载.
- 开发新的催化剂结构可以提高性能并减少贵金属的使用.
研究的目的:
- 为酸性OER合成和描述在碳纳米管 (CeO2-Ir/CNTs) 上支持的CeO2-Ir异构连接.
- 评估合成的催化剂的催化活性,质量活性和稳定性.
- 研究CeO2-Ir异构在提高OER性能方面的作用.
主要方法:
- 使用异构结构策略的CeO2-Ir/CNTs的溶热合成.
- 对酸氧演化反应 (OER) 性能进行电化学测试.
- X射线光电子光谱 (XPS) 分析以探测催化剂的组成和电子结构.
主要成果:
- CeO2-Ir/CNTs在262.9 mV的低超电位下达到10.0 mA cm-2,稳定性为60.0小时.
- 它的质量活动比商业的IrO2 (c-IrO2) 高58.8倍,使用了15.3倍少的Ir.
- XPS分析表明,CeO2有效调节了纳米颗粒的化学环境,增强了催化性能.
结论:
- CeO2-Ir/CNT是酸性OER的高效和稳定的电催化剂.
- 异构结构策略显著提高了Ir催化剂的质量活动.
- 这些发现突显了CeO2-Ir/CNTs作为水电解的先进阳极催化剂的潜力.
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