1. Boosting Electrocatalytic Ethylene Epoxidation by Single Atom Modulation.
- Author
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Wang, Hanyu, Wang, Shuo, Song, Yanpeng, Zhao, Yang, Li, Zhenyu, Shen, Yuxiang, Peng, Zhangquan, Gao, Dunfeng, Wang, Guoxiong, and Bao, Xinhe
- Subjects
EPOXIDATION ,ETHYLENE oxide ,ETHYLENE ,ATOMS ,ELECTRONIC modulation ,MANUFACTURING processes - Abstract
The electrochemical synthesis of ethylene oxide (EO) using ethylene and water under ambient conditions presents a low‐carbon alternative to existing industrial production process. Yet, the electrocatalytic ethylene epoxidation route is currently hindered by largely insufficient activity, EO selectivity, and long‐term stability. Here we report a single atom Ru‐doped hollandite structure KIr4O8 (KIrRuO) nanowire catalyst for efficient EO production via a chloride‐mediated ethylene epoxidation process. The KIrRuO catalyst exhibits an EO partial current density up to 0.7 A cm−2 and an EO yield as high as 92.0 %. The impressive electrocatalytic performance towards ethylene epoxidation is ascribed to the modulation of electronic structures of adjacent Ir sites by single Ru atoms, which stabilizes the *CH2CH2OH intermediate and facilitates the formation of active Cl2 species during the generation of 2‐chloroethanol, the precursor of EO. This work provides a single atom modulation strategy for improving the reactivity of adjacent metal sites in heterogeneous electrocatalysts. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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