基于Pt的超细催化剂装饰有氧友的Ni位点,加速性H2O解离,以实现高效的进化
Liming Chen1, Lianmei Kang1, Dandan Cai1
1The Key Lab of Low-carbon Chemistry & Energy Conservation of Guangdong Province, PCMF Laboratory, School of Chemical Engineering and Technology, School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China.
Journal of colloid and interface science
|July 27, 2023
概括
本研究介绍了一种新的,具有成本效益的-催化剂,用于演化反应 (HER). 新的催化剂显著降低了性溶液中的能量障碍,提高了生产效率.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
背景情况:
- (Pt) 是演化反应 (HER) 的关键催化剂,但由于高水解离能,在性介质中昂贵且低效.
- 开发具有成本效益和高活性的HER电催化剂对于广泛生产气至关重要.
研究的目的:
- 设计和合成一种以为基础的超细催化剂,用 (Ni) 位点装饰,以提高 HER 在性介质中的性能.
- 调查Ni-sites提高Pt.的催化活性的机制.
主要方法:
- 合成一种基于Pt的超细催化剂,使用Pt5(GS) 10纳米集群前体,装饰有氧友的Ni-位点.
- 电化学表征,包括超电位和Tafel斜率测量,以评估HER的性能.
- 实验观察和理论计算以阐明催化机制.
主要成果:
- 优化的Ni-装饰的Pt催化剂 (Ni-Pt-C-500) 在10 mA cm-2时显示出14.0 mV的低超电位,以及20.8 mV dec-1.1的Tafel斜率.
- 装饰着Ni的催化剂显著超过了其未装饰的对应物,商业Pt/C,以及之前报告的基于Pt的催化剂.
- 发现Ni位点促进了自发的水吸附和加速水分裂动力学,优化了Pt的电子结构.
结论:
- 开发的Ni装饰的超细Pt催化剂为性介质中高效的HER提供了一个有希望的,具有成本效益的替代方案.
- 装饰Pt纳米集群与氧友金属位点的策略为设计先进的电催化剂提供了新的途径.
- 这项研究推动了高效的混合电催化剂的开发,以提高催化反应动力学.
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