Journal
CHEMICAL SCIENCE
Volume 12, Issue 19, Pages 6638-6645Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1sc01117k
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Funding
- National Key Research and Development Program of China [2017YFA0403102]
- National Natural Science Foundation of China [21890761, 21733011]
- Beijing Municipal Science AMP
- Technology Commission [Z191100007219009]
- Chinese Academy of Sciences [QYZDY-SSW-SLH013]
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The combination of cerium oxides and CuO in CeO2/CuO demonstrated an outstanding catalytic performance for C2+ products, showing that the interface and subsurface structure coordination during CO2RR process can enhance both the selectivity and activity for C2+ products.
Electrocatalytic reduction of CO2 into multicarbon (C2+) products powered by renewable electricity offers one promising method for CO2 utilization and promotes the storage of renewable energy under an ambient environment. However, there is still a dilemma in the manufacture of valuable C2+ products between balancing selectivity and activity. In this work, cerium oxides were combined with CuO (CeO2/CuO) and showed an outstanding catalytic performance for C2+ products. The faradaic efficiency of the C2+ products could reach 75.2% with a current density of 1.21 A cm(-2). In situ experiments and density functional theory (DFT) calculations demonstrated that the interface between CeO2 and Cu and the subsurface Cu2O coexisted in CeO2/CuO during CO2RR and two competing pathways for C-C coupling were promoted separately, of which hydrogenation of *CO to *CHO is energetically favoured. In addition, the introduction of CeO2 also enhanced water activation, which could accelerate the formation rate of *CHO. Thus, the selectivity and activity for C2+ products over CeO2/CuO can be improved simultaneously.
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