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Updated: Oct 2, 2025
Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
Published on: April 10, 2018
In Situ Halogen-Ion Leaching Regulates Multiple Sites on Tandem Catalysts for Efficient CO2 Electroreduction to C2+
Ruoou Yang1, Junyuan Duan1, Panpan Dong2
1State Key Laboratory of Materials Processing and Die & Mould Technology, and School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, P. R. China.
Abstract:
Tandem catalysts can divide the reaction into distinct steps by local multiple sites and thus are attractive to trigger CO2 RR to C2+ products. However, the evolution of catalysts generally exists during CO2 RR, thus a closer investigation of the reconstitution, interplay, and active origin of dual components in tandem catalysts is warranted. Here, taking AgI-CuO as a conceptual tandem catalyst, we uncovered the interaction of two phases during the electrochemical reconstruction. Multiple operando techniques unraveled that in situ iodine ions leaching from AgI restrained the entire reduction of CuO to acquire stable active Cu0 /Cu+ species during the CO2 RR. This way, the residual iodine species of the Ag matrix accelerated CO generation and iodine-induced Cu0 /Cu+ promotes C-C coupling. This self-adaptive dual-optimization endowed our catalysts with an excellent C2+ Faradaic efficiency of 68.9 %. Material operando changes in this work offer a new approach for manipulating active species towards enhancing C2+ products.
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