在氧化物中的协同格子-菌株和电子调制,用于增强的质子交换膜水电解
Zhi Wang1, Zhiming Bai2, Chengdeng Wang1
1School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, P. R. China.
ACS applied materials & interfaces
|January 20, 2026
概括
和联合化氧化物 (F-In-Co3O4) 通过减少过量的电位和提高水分裂的稳定性来增强氧演化反应 (OER) 电催化剂.
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:
- 螺旋氧化物 (Co3O4) 是一种潜在的替代二氧化 (IrO2) 酸氧演化反应 (OER) 电催化剂.
- 然而,CO3O4存在高过量的潜能和不稳定性,这限制了其实际应用.
研究的目的:
- 开发一种新的和联合化氧化物 (F-In-Co3O4) 催化剂.
- 调查共兴奋剂对OER的电子结构,催化活性和氧化物的稳定性的影响.
主要方法:
- (In) 和 (F) 的联合化成Co3O4.4.
- 用于电子结构分析的X射线吸收光谱学 (XAS).
- 初始分子动力学 (AIMD) 和外置X射线光电子光谱学 (XPS) 用于稳定性研究.
- 在酸性介质中的电化学测试和质子交换膜 (PEM) 电解剂的评估.
主要成果:
- 联合兴奋剂诱导了格子应变,并延长了八面体[CoO6]结构.
- F-In-Co3O4催化剂在100 mA cm-2时实现了462 mV的超电位,超过了商业的IrO2.
- (In3+) 作为电子捐赠体,抑制了过氧化和离子溶解,增强了稳定性.
- 在PEM电解器中,F-In-Co3O4催化剂在100多小时内表现出稳定的运行.
结论:
- 与原始 Co3O4 和商业 IrO2.2 相比,F-In-Co3O4 催化剂表现出优越的 OER 活性和稳定性.
- 格子应变和改变的Co-O结合是改善催化性能的关键因素.
- 开发的催化剂对实际的水分应用具有显著的前景.
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