首页|Exploration of Gas-Dependent Self-Adaptive Reconstruction Behavior of Cu2O for Electrochemical CO2 Conversion to Multi-Carbon Products
Exploration of Gas-Dependent Self-Adaptive Reconstruction Behavior of Cu2O for Electrochemical CO2 Conversion to Multi-Carbon Products
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Exploration of Gas-Dependent Self-Adaptive Reconstruction Behavior of Cu2O for Electrochemical CO2 Conversion to Multi-Carbon Products
Structural reconstruction of elec-trocatalysts plays a pivotal role in catalytic per-formances for CO2 reduction reaction(CO2RR),whereas the behavior is by far superficially understood.Here,we report that CO2 accessi-bility results in a universal self-adaptive struc-tural reconstruction from Cu2O to Cu@CuxO composites,ending with feeding gas-dependent microstructures and catalytic performances.The CO2-rich atmosphere favors reconstruction for CO2RR,whereas the CO2-deficient one prefers that for hydrogen evolution reaction.With the assistance of spectroscopic analysis and theo-retical calculations,we uncover a CO2-induced passivation behavior by identifying a reduction-resistant but catalytic active Cu(Ⅰ)-rich amorphous layer stabilized by*CO intermediates.Additionally,we find extra CO production is indis-pensable for the robust production of C2H4.An inverse correlation between durability and FECO/FEC2H4 is disclosed,suggesting that the self-stabilization process involving the absorption of*CO intermediates on Cu(Ⅰ)sites is essential for durable electrolysis.Guided by this insight,we design hollow Cu2O nanospheres for durable and selective CO2RR electrolysis in producing C2H4.Our work recognizes the previously overlooked passivation reconstruction and self-stabilizing behavior and highlights the critical role of the local atmosphere in modulating reconstruction and catalytic processes.
CO2 reduction reactionElectrocatalystsCu2OReconstructionSelf-adaptive electrocatalysis
State Key Laboratory of Metal Matrix Composites,School of Materials Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,People's Republic of China
CO2 reduction reaction Electrocatalysts Cu2O Reconstruction Self-adaptive electrocatalysis
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