金属有机框架的自我优化重建引入了空隙,用于过氧化的选择性电合成
Chao Miao1, Shaohan Xu1, Ziwen An1
1School of Chemical Science and Engineering, Key Laboratory of Spine and Spinal Cord Injury Repair and Regeneration, Ministry of Education, Tongji Hospital, Tongji University, 1239 Siping Road, Shanghai, 200092, P.R. China.
Angewandte Chemie (International ed. in English)
|April 1, 2025
概括
这项研究引入了一种用于绿色过氧化 (H2O2) 合成的新型电催化剂. 新材料在工业电流密度下实现了高效率和选择性,提供了可持续的生产方法.
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
- 绿色化学 绿色化学
背景情况:
- 过氧化 (H2O2) 通过两电子氧降解途径的电催化合成是关键的绿色生产方法.
- 在工业电流密度下实现高催化剂活性仍然是一个重大挑战.
研究的目的:
- 在工业电流密度下开发一种高效的H2O2电合成电催化剂.
- 调查离子空缺在提高催化剂性能方面的作用.
主要方法:
- 金属有机框架自我优化重新配置,以产生空缺空间.
- 在固体电解质电池中使用ZIF-ZC91@Co(OH) 2-VCo电催化剂进行H2O2的电合成.
- 理论计算,以了解催化活动上的位空缺机制.
主要成果:
- 该ZIF-ZC91@Co(OH) 2-VCo电催化剂显示了97.8%的H2O2选择性和24.53molg催化剂-1h-1.1的生产率.
- 连续输出~3.36重量%的H2O2水溶液在400mAcm-2工业电流密度下.
- 卓越的长期耐用性 (>220小时) 和~8.03%重量%H2O2溶液的试点规模生产.
结论:
- 阴子空位优化OOH中间吸附,降低反应障碍,增强双电子氧降解的选择性.
- 这项工作为快速,环保的H2O2合成和催化剂设计提供了一个有希望的策略.
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