双活性位点介导的Ir单原子合的RuO2催化剂,用于高效和稳定的水分裂
Zhenhua Tao1, Ning Lv1, Hongyu Zhao1
1State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology Wuhan 430070 China msc@whut.edu.cn.
Chemical science
|September 27, 2024
概括
在二氧化 (RuO2) 中用 (Ir) 进行单原子兴奋剂,可增强演化反应 (HER) 和氧演化反应 (OER) 的电催化. 这种新的IrSA/RuO2催化剂在酸性和性介质中表现出卓越的活性和稳定性.
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:
- 异质单原子兴奋剂是提高催化剂性能的一个关键策略.
- 二氧化卢 (RuO2) 是已知的催化剂,但其效率可以提高.
研究的目的:
- 为了构建和评估二氧化 (IrSA/RuO2) 催化剂的二氧化 (IrSA/RuO2) 催化剂.
- 调查电子结构调制对电催化物的影响.
主要方法:
- 通过用 Ir 原子替换 Ru 位点来合成 Ir 单原子合的 RuO2 (IrSA/RuO2).
- 在和酸性介质中对演变反应 (HER) 和氧演变反应 (OER) 进行电催化试验.
- 分析电子结构和反应机制的理论计算.
主要成果:
- 在性介质中,IrSA/RuO2-850对HER (37 mV) 和OER (234 mV) 的过高潜力较低,表现优于商业Pt/C和RuO2.
- 催化剂表现出极好的稳定性,在1000小时的HER测试中没有显著的降解.
- 在酸性介质中也观察到较高的催化活性和稳定性.
- 理论计算证实,Ir doping调节电子结构,降低HER和OER的能量障碍,增强结构稳定性.
结论:
- 单原子兴奋剂有效地增强了HER和OER的RuO2的电催化活性和稳定性.
- 通过单原子兴奋剂对电子结构和活性位点进行精确的控制,为设计高性能催化剂提供了一个有希望的策略.
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