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Highly efficient ethylene production via electrocatalytic hydrogenation of acetylene under mild conditions.


ABSTRACT: Renewable energy-based electrocatalytic hydrogenation of acetylene to ethylene (E-HAE) under mild conditions is an attractive substitution to the conventional energy-intensive industrial process, but is challenging due to its low Faradaic efficiency caused by competitive hydrogen evolution reaction. Herein, we report a highly efficient and selective E-HAE process at room temperature and ambient pressure over the Cu catalyst. A high Faradaic efficiency of 83.2% for ethylene with a current density of 29 mA cm-2 is reached at -0.6 V vs. the reversible hydrogen electrode. In-situ spectroscopic characterizations combined with first-principles calculations reveal that electron transfer from the Cu surface to adsorbed acetylene induces preferential adsorption and hydrogenation of the acetylene over hydrogen formation, thus enabling a highly selective E-HAE process through the electron-coupled proton transfer mechanism. This work presents a feasible route for high-efficiency ethylene production from E-HAE.

SUBMITTER: Wang S 

PROVIDER: S-EPMC8648715 | biostudies-literature | 2021 Dec

REPOSITORIES: biostudies-literature

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Highly efficient ethylene production via electrocatalytic hydrogenation of acetylene under mild conditions.

Wang Suheng S   Uwakwe Kelechi K   Yu Liang L   Ye Jinyu J   Zhu Yuezhou Y   Hu Jingting J   Chen Ruixue R   Zhang Zheng Z   Zhou Zhiyou Z   Li Jianfeng J   Xie Zhaoxiong Z   Deng Dehui D  

Nature communications 20211206 1


Renewable energy-based electrocatalytic hydrogenation of acetylene to ethylene (E-HAE) under mild conditions is an attractive substitution to the conventional energy-intensive industrial process, but is challenging due to its low Faradaic efficiency caused by competitive hydrogen evolution reaction. Herein, we report a highly efficient and selective E-HAE process at room temperature and ambient pressure over the Cu catalyst. A high Faradaic efficiency of 83.2% for ethylene with a current density  ...[more]

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