对的影响 氧在酸性条件下的氧演化反应的结构和活性
Erlend Bertheussen1, Simon Pitscheider1, Susan R Cooper1
1Danish Technological Institute, Center for Functional Materials, 2630 Taastrup, Denmark.
ACS materials Au
|September 16, 2024
概括
将添加到-纳米粒子中显著增加了在质子交换膜水电解 (PEMWE) 中的氧化演化反应 (OER) 活性,通过增强催化剂分散,而不是内在活性.
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:
- 质子交换膜水电解 (PEMWE) 对于绿色生产至关重要.
- 高成本和低效率限制了PEMWE的广泛采用.
- 昂贵的催化剂和高氧演化反应 (OER) 的过度潜力是关键的挑战.
研究的目的:
- 在氧化 (ATO) 上合成高度分散的- (IrRu) 纳米粒子.
- 研究 (Ni) 添加对IrRu催化剂结构和OER活性的影响.
- 通过实验和理论方法阐明开放资源资源活动增强的起源.
主要方法:
- 在ATO上合成IrRu纳米颗粒,含有和没有Ni.
- 使用X射线技术进行表征.
- 通过旋转盘电极 (RDE) 测量对OER活动的电化学评估.
- 密度函数理论 (DFT) 的计算.
主要成果:
- 添加改变了IrRu纳米粒子结构,从金属到氧化物 (rutile/hollandite).
- 含的催化剂的颗粒尺寸更小,分散性更好.
- 与Ni合成的IrRu催化剂显示OER活性比IrO2基准高7倍.
- 据DFT计算,从荷兰的结构来看,OER活动并没有出现内在的改善.
结论:
- 添加显著提高了PEMWE中IrRu催化剂的OER性能.
- 增强的活性归因于由于粒子尺寸较小和分散性更好,电化学表面积增加.
- 这项研究为更高效和更具成本效益的PEMWE系统提供了途径.
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