首页|Highly dispersed atomic-level Ni active sites confined in defects for efficient electrocatalytic reduction of carbon dioxide
Highly dispersed atomic-level Ni active sites confined in defects for efficient electrocatalytic reduction of carbon dioxide
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Electrocatalytic CO2 reduction reaction(eCO2RR)presents a promising approach for harnessing renew-able energy and converting greenhouse gas(CO2)into high value-added CO products.N-doped single atom(SA)and atomic-level metal nanocluster(MN)tandem catalysts with rich defects for eCO2RR are reported,which achieved a maximum CO Faraday efficiency(FEco)of 97.7％(-0.7 V vs.RHE)in the H-type cell and maintained over 95％FEco at potentials from-0.18 to-0.73 V vs.RHE in the flow cell.Furthermore,the catalyst in the flow cell demonstrated a remarkably low onset potential of-0.14 V vs.RHE and the current density was approximately three times that of the H-type cell.Interestingly,XPS analysis indicates that carbon substrates containing defects have more pyridine-N content.DFT calcula-tions and in-situ attenuated total reflection Fourier transform infrared support this finding by showing that the Ni-(N-C2)3 active sites with defect favors preferentially convert CO2-to-CO.
Wenjun Zhang、Chen Zhao、Yang Yang、Ruotong Chen、Yue Wu、Jiaqi Dai、Yuxing Zhang、Huajie Liu、Mingyang Liu
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College of Environmental Science and Engineering,State Key Laboratory of Medicinal Chemical Biology,Nankai University,Tianjin 300350,China
School of Chemical Science and Engineering,Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education and Shanghai Research Institute for Intelligent Autonomous Systems,Tongji University,Shanghai 200092,China
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