光化学法制备过渡金属-氮共掺杂多孔炭基CO2电还原催化剂

doi:10.19964/j.issn.1006-4990.2021-0231

Abstract

Abstract:

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）.

Key words: photochemical method, nickel-nitrogen co-doped carbon, porous carbon, CO₂ electroreduction, electrocatalysts, carbon neutralization

CLC Number:

TQ138.13

Hu Xu,Dong Lingyu,Li Wencui,Hao Guangping. 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.

Figures/Tables 6

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Table 1

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References 19

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样品	比表面积/（m²·g^-1）	孔容/（cm³·g^-1）
NC-700	686	0.49
NC-900	658	0.43
Ni/NC-2	640	0.35

National Inorganic Salts Information Center

Inorganic Acid-Base-Salt Committee of CIESC

Preparation of transition metal-nitrogen co-doped porous carbon-based CO₂electro-reduction catalyst through photochemical method

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Preparation of transition metal-nitrogen co-doped porous carbon-based CO2electro-reduction catalyst through photochemical method