2026-04-09 中国科学院（CAS）
＜関連情報＞
- https://english.cas.cn/newsroom/research-news/202604/t20260410_1155616.shtml
- https://pubs.acs.org/doi/10.1021/jacs.6c01386
直接電気触媒によるエチレンエポキシ化のための単原子Pt安定化スーパーオキソ種 Single Atom Pt-Stabilized Superoxo Species for Direct Electrocatalytic Ethylene Epoxidation
Hanyu WangTianfu Liu,Yanpeng Song,Yang Zhao,Pengfei Wei,Yi Wang,Jing Xue,Jiatai Zhao,Yaqi Wang,Xiaozhi Su,Dunfeng Gao,Guoxiong Wang,and Xinhe Bao
Journal of the American Chemistry Society Publishe March 30, 2026
DOI:https://doi.org/10.1021/jacs.6c01386
Abstract
Renewable energy-driven electrosynthesis of ethylene oxide (EO) from ethylene is highly desired, as it is a low-carbon alternative to current industrial production process. The direct electrocatalytic ethylene epoxidation with water as a green oxidant is promising, yet it suffers from the activity-selectivity trade-off due to uncontrolled overoxidation. Here we construct PdO supported Pt single atoms to generate superoxo species as reactive oxygen species (ROS) and accelerate selective oxidation of ethylene. This catalyst design enables efficient EO production in a zero-gap membrane electrode assembly electrolyzer, with a partial current density of 71 mA cm–2 at a low cell voltage of 2.6 V. Furthermore, a scale-up demonstration using a 100 cm2 electrolyzer achieves a remarkable EO production rate of 6.4 g h–1 at a total current of 15 A. Thorough in situ spectroscopic characterizations and theoretical calculations indicate that the Pt single atoms, in synergy with ClO4– anions present in electrolyte, enable facile generation of abundant superoxo species and accelerated epoxidation of ethylene that is activated by the PdO support. This work highlights the importance of generating and stabilizing specific ROS for selective oxidation of organic molecules.
