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合Co,N联合合的碳纳米管和PtCo纳米粒子,以促进氧降解反应

Wen Feng¹, Congyue Sun², Xiaojin Li³

¹College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, P. R. China.

|April 19, 2025

概括

在碳纳米管上的新型PtCoNC催化剂增强了燃料电池的氧降解反应 (ORR). 与商业选择相比,这种催化剂显示出更高的活性和稳定性,为高效的质子交换膜燃料电池铺平了道路.

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:

质子交换膜燃料电池 (PEMFCs) 需要高效的催化剂,以减少氧反应 (ORR),由于缓慢的阴极动力学.
基催化剂是有效但昂贵的,需要低负载,高性能替代品.

研究的目的:

合成和评估一种新的-合金在和联合化碳纳米管 (PtCoNC) 催化剂上.
调查ORR的PtCoNC催化剂中Pt的增强活性,稳定性和利用率.

主要方法:

通过在Co和N共碳纳米管上形成合金,合成PtCoNC催化剂.
电化学表征包括半波潜力和活性测量在酸性介质中.
验证金属支相互作用的理论计算.

主要成果:

PtCoNC催化剂的ORR活性明显高于商业Pt/C,半波潜力为0.893V与RHE.
质量和特异性活动分别是0.9V和RHE的3倍和2.6倍,高于0.9V.
通过理论计算和催化剂结构证实了增强的金属支相互作用和改进的Pt利用率.

结论:

PtCoNC催化剂提供了一个有前途的低Pt负载解决方案,用于PEMFC中高效和稳定的ORR.
碳纳米管和Co-Nx位点的独特结构有助于催化剂的卓越性能.
这种发展可能会导致更具成本效益和耐用性的燃料电池技术.

关键词:

基于 Pt 的 Pt 基合金效应是一种合金效应.碳纳米管是如何使用的氧降解反应是减少氧的反应.金属支的相互作用.

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