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Preparation of transition metal-nitrogen co-doped porous carbon-based CO2electro-reduction catalyst through photochemical method
Received date: 2021-04-19
Online published: 2021-07-08
Transition metal-nitrogen co-doped carbon materials are a kind of high efficiency electrocatalysts for CO2 reduction. The nitrogen-doped carbon material prepared by pyrolysis polymer was used as the support,and the nickel precursor was synthesized by an impregnation method.The highly dispersed Ni-N-C type catalysts（Ni/NC） were obtained through the photochemical method with the assistant of infrared lamp for 2 h.The morphology,structure,phase and composition of catalysts were characterized by scanning electron microscopy（SEM）,gas physisorption,X-ray diffraction（XRD） and X-ray photoelectron spectroscopy（XPS）.The electrocatalytic activity on CO2 reduction reaction was analyzed.The electrochemical performance test results showed that with the electrolyte（KHCO 3） of 0.5 mol/L,the sample with Ni loading of 2% delivered the best catalytic performance and CO partial current density was significanted improved.,the Tafel slope was 492 mV/dec,and the initial overpotential was 286 mV.At -0.6 V（vs.RHE）,the Faradaic efficiency of CO was 78%.The ratio of 0.5~3.6 for n（CO）/n（H2） was achieved in the range of -1.0~ -0.5 V（vs.RHE）.
Xu Hu , Lingyu Dong , Wencui Li , Guangping Hao . Preparation of transition metal-nitrogen co-doped porous carbon-based CO2electro-reduction catalyst through photochemical method[J]. Inorganic Chemicals Industry, 2021 , 53(6) : 8 -13 . DOI: 10.19964/j.issn.1006-4990.2021-0231
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