支持加速质子转移用于增强氧气进化催化
Wenrui Li1, Jianning Lv1, Xianchun Chen1
1Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Key Laboratory of Cluster Science, Ministry of Education, Frontiers Science Center for High Energy Material, Advanced Technology Research Institute (Jinan), School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, P. R. China.
Journal of the American Chemical Society
|August 2, 2025
概括
催化剂支持可以积极加速反应. 具有基组的功能支持增强了氧演化反应 (OER) 中的质子转移,显著提高了催化效率.
科学领域:
- 电化学和材料科学
背景情况:
- 催化剂支通常被视为分散活性物种的惰性材料.
- 工程催化剂支持积极参与反应,特别是质子转移,仍然是一个未经探索的领域.
研究的目的:
- 证明催化剂支可以被设计为积极参与催化反应.
- 研究功能支持在氧化演化反应 (OER) 中加速介面质子转移的作用.
主要方法:
- 在基和甲基功能化酸支架上合成氧化 (IrO2) 集群 (IrO2/OH-ZrP和IrO2/CH3-ZrP).
- 现场光谱,电化学测量和理论计算以阐明反应机制.
- 旋转依赖的OER活动研究和局部pH测量提供了支持介导的质子转移的证据.
主要成果:
- 在IrO2/OH-ZrP支架上的基直接参与OER,通过降低OOH脱质障碍,促进质子转移.
- 这导致支持加速质子转移机制 (SAEM),与观察到的IrO2/CH3-ZrP常规吸附物演变机制 (AEM) 截然不同.
- 在300mV的超电位下,IrO2/OH-ZrP的转换频率是IrO2/CH3-ZrP的2.99倍.
结论:
- 催化剂支可以通过促进质子转移来积极设计以提高催化性能.
- 支持工程对于质子转移有限反应至关重要,
- SAEM机制强调了功能化支持在推进OER和其他反应的电催化剂设计方面的潜力.
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