温度诱导的WC接口杂交增强性氧化反应的NiCu活性
Zhenyang Xie1, Mengting Li1, Yuanyuan Zhou1
1College of Chemistry and Chemical Engineering, State Key Laboratory of Advanced Chemical Power Sources, Center of Advanced Energy Technology and Electrochemistry (CAETE), Institute of Advanced Interdisciplinary Studies, Chongqing University, Chongqing, 400044, China.
Small methods
|April 4, 2024
概括
开发用于氧化反应 (HOR) 的非贵金属催化剂是无Pt燃料电池的关键. 这项研究引入了一种新的NiCuW催化剂,其稳定性和性能提高了高效的HOR催化.
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:
- 商业化无燃料电池需要高效的非贵金属催化剂,用于氧化反应 (HOR).
- -铜 (NiCu) 合金看起来很有前途,但需要提高性能才能广泛采用.
研究的目的:
- 开发一种基于NiCu的新型催化剂,提高HOR性能和稳定性.
- 研究 (W) 兴奋剂和相杂化对催化活性的影响.
主要方法:
- 采用温度诱导相杂化方法来制造一个NiCuW合金催化剂.
- 催化剂的接口是通过迁移W原子来混合氧化 (WOx) 和碳化 (WC) 阶段来设计的.
- 进行了电化学表征,以评估HOR活性,稳定性和CO电阻.
主要成果:
- 混合的NiCuW/WOx-WC@WC催化剂表现出显著减弱的H结合能量和优化的OH结合能量.
- 催化剂在HOR期间表现出极好的稳定性和对CO中毒的抗性.
- 在H2-O2离子交换膜燃料电池 (AEMFCs) 中,达到29.37 mA mg-1 Ni的高质量活性和298 mW cm-2的峰值功率密度.
结论:
- 温度诱导的相杂化是一种有效的策略,可以提高NiCu合金对HOR的催化性能.
- 开发的NiCuW/WOx-WC@WC催化剂代表了对AEMFCs贵金属催化剂的有希望的替代品.
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