通过氧降解反应在酸中产生过氧化的CoIn双原子催化剂
Jiannan Du1, Guokang Han2, Wei Zhang1
1School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, PR China.
Nature communications
|August 8, 2023
概括
一种新型的双原子- (CoIn) 催化剂在酸性条件下有效地产生过氧化 (H2O2). 催化剂优化了氧降解反应路径,实现了高生产率和工业应用的卓越稳定性.
科学领域:
- 催化剂是一种催化剂.
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
背景情况:
- 酸中的两电子氧降解反应 (ORR) 对于生产过氧化 (H2O2),一种重要的工业化学品至关重要.
- 目前的方法面临挑战,因为反应动力学缓慢,限制了高效的H2O2合成.
研究的目的:
- 开发一种高效的催化剂,通过酸性介质中的两电子ORR产生H2O2.
- 用理论计算和现场表征来阐明催化机制.
主要方法:
- 密度函数理论 (DFT) 计算以建模催化机制.
- 在现场表征技术来分析催化剂的行为.
- 旋转环盘电极 (RRDE) 测试以量化H2O2的生产.
- 在运行条件下评估性能的三相流电池实验.
主要成果:
- 双原子CoIn催化剂通过 (In) 促进了有利的基吸附,优化了OOH在 (Co) 上的吸附.
- CoIn催化剂促进了向两电子ORR路径的转移,增强了H2O2的选择性.
- 在0.65V时,H2O2的部分电流密度为1.92 mA cm−2,产量为9.68 mol g−1 h−1.1,生产率为9.68 mol g−1.
- 证明了CoIn--碳 (CoIn-N-C) 催化剂的优良长期稳定性.
结论:
- CoIn-N-C 催化剂提供了一个有前途的策略,用于在酸性电解质中有效和稳定的 H2O2 生产.
- 这些发现为设计用于电化学合成的先进催化剂提供了宝贵的见解.
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