含的WO3使得基媒介中的高效氧化反应成为可能
Hai Liu1, Zhuang Zhang1, Mengxuan Li1
1State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China. liyp@mail.buct.edu.cn.
Nanoscale
|July 5, 2023
概括
我们开发了一种新型的三氧化 (Ru-WO3) 催化剂,用于性介质中的氧化反应 (HOR),显著优于交换膜燃料电池 (AEMFC) 中的催化剂.
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:
- 为氧化反应 (HOR) 开发高效的电催化剂对于推进阳离子交换膜燃料电池 (AEMFC) 的发展至关重要.
- 性介质对HOR催化具有独特的挑战和机会.
- 现有的催化剂,如,在特定条件下面临成本和性能限制.
研究的目的:
- 合成和评估一种新型的与鲁相配合的六边形三氧化物 (Ru-WO3) 作为性介质中HOR的电催化剂.
- 阐明结构-活动关系,管理Ru-WO3.3的增强HOR性能.
- 为AEMFCs提供一类新的非贵金属基催化剂.
主要方法:
- 液热合成Ru-WO3电催化剂的方法.
- 电化学表征,包括循环电压测量和时测量,以评估HOR活性和耐用性.
- 先进的结构特征技术 (例如,X射线衍射,电子显微镜) 和密度函数理论 (DFT) 计算,以了解催化机制.
主要成果:
- 合成的Ru-WO3催化剂显示,与商业Pt/C相比,HOR的交流电流密度增加了6.1倍.
- 在性电解质中,Ru-WO3表现出优越的耐用性.
- 鉴定和计算表明,氧缺陷和从氧转移到的电子转移调节吸附,而位促进氧吸附,加速HOR动力学.
结论:
- 在六角三氧化物中注入是为性介质制造高效的HOR电催化剂的有效策略.
- 增强的性能归因于Ru位点的调制吸附和W位点的促进吸附.
- 这项工作扩大了有效的HOR催化剂的范围,超越了贵金属,为AEMFC应用提供了有前途的替代方案.
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