的单个原子固定在TiO支上,作为进化反应的有效催化剂
Wenxuan Li1, Dashu Yin1, Peng Li1
1College of Electrical Engineering, Chuzhou Polytechnic, Chuzhou 239000, China. zhaoxinhua@chzc.edu.cn.
Physical chemistry chemical physics : PCCP
|July 11, 2024
概括
我们开发了一种基于的新型单原子催化剂 (Ir@TiO2),用于进化反应 (HER). 这种具有成本效益的催化剂表现出高活性和耐用性,与类催化剂相美.
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:
- 单原子催化剂 (SAC) 提供高原子效率,并减少贵金属的使用,如演化反应 (HER) 的反应.
- 开发高效且耐用的催化剂对于清洁能源技术至关重要.
研究的目的:
- 为了合成和表征一种新型的单原子催化剂,使用在TiO2纳米片 (Ir@TiO2) 上定的原子分散的来用于HER.
- 在酸性介质中评估Ir@TiO2催化剂的催化性能和耐用性.
主要方法:
- 通过将原子分散的固定在TiO2纳米片上,合成Ir@TiO2.
- 使用偏差校正扫描传输电子显微镜进行表征,以确认原子分散.
- 在酸性介质中对HER活性进行电化学评估,包括超电位,Tafel斜率和耐久性测试.
主要成果:
- 经过异常校正的扫描传输电子显微镜证实了Ir在TiO2上的原子分散,由表面功能群定.
- Ir@TiO2催化剂 (1.35 wt% Ir) 在10 mA cm-2时表现出低超电位41 mV,Tafel斜率为42 mV dec-1.
- 催化剂表现出极好的耐用性,在1000个HER循环后仅有1mV的转移,与商业Pt/C相比.
结论:
- 在TiO2纳米片上原子分散的是演化反应的高度活跃和持久的催化剂.
- 这项工作提出了一个具有成本效益的策略,用于设计HER的先进单原子催化剂,与贵金属催化剂竞争.
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