对二原子活性站点进行合理设计,以阐明氧的演化反应性能趋势
Nanfeng Xu1, Yuxiang Jin2, Qiunan Liu3
1Laboratory of Advanced Spectro-electrochemistry and Li-ion Batteries, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China.
Angewandte Chemie (International ed. in English)
|October 4, 2024
概括
研究人员开发了一种新方法,用于制造氧气演化反应的异核二原子催化剂. 确定了性能趋势,建议优化这些先进催化剂的描述符.
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:
- 具有异质核活性位点的二原子催化剂在氧化演化反应等高能反应中比单原子催化剂具有优势.
- 将这些催化剂与可预测的结构-属性关系合成仍然是一个挑战.
研究的目的:
- 制定制造具有受控结构的异核二原子催化剂的战略.
- 为了研究氧气进化反应催化物的结构性能关系.
主要方法:
- 采用宏循环前体受约束策略,在碳基质中合成过渡金属-贵金属二原子中心 (MT-MN).
- 合成催化剂的催化性能被评估为氧气演化反应.
主要成果:
- 一系列Ni,Co,Fe,Mn或Cu与Ir或Ru配对成功合成.
- 观察到一个明确的表现趋势:Cu-MN
N N N N N. - OOH (*OOH) 和OH (*OH) 吸附的吉布斯自由能量 (ΔG*OOH-ΔG*OH) 被确定为催化性能的潜在描述器.
结论:
- 宏循环前体策略使得二元原子活性位点的合成具有可控的协调和多样化的组成.
- 了解中间体的吸附行为为优化氧气电催化剂的二原子催化剂提供了机械的见解.
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