Study on phosphorous-doped cobalt-nitrogen-carbon catalysts for electrocatalytic reduction of carbon dioxide
LI Bingyi
YE Jinze
YE Qingyu
LI Weizhe
LI Feixiang
QIU Ming
Abstract：The burning of fossil fuels has led to a rapid increase in the concentration of carbon dioxide(CO2)in the atmosphere,resulting in a serious energy and environmental crisis.Electrocatalytic re-duction of CO2 to value-added chemicals and fuels,driven by renewable electricity,is an effective method for addressing the current depletion of fossil fuels.In this paper,a phosphorus-modified highly dispersible cobalt-nitrogen-carbon(Co-N-C)catalyst was prepared using a"one-pot"method.The catalyst's morphology,element distribution,defect degree,surface element valence and coordination structure were characterized using scanning electron microscopy(SEM),X-ray diffraction(XRD),Raman spectroscopy,and X-ray photoelectron spectroscopy(XPS).The performance of the catalyst in the electrocatalytic reduction of CO2 to CO in an H-type cell was investigated.The results showed that the prepared Co-N-C/P catalyst exhibited a 97.0％CO Faraday Efficiency(FECO)at an applied po-tential of-0.9 V vs.RHE,with a current density of 4.58 mA/cm2,and demonstrated stability over a 26-hour test.Compared with the Co-N-C catalysts,the P-dopant facilitated a good dispersion of Co atoms on the carbon black substrate,resulting in an approximately 38.9％increase in FECO.These findings demonstrated that the P-dopant significantly enhanced the performance of Co-N-C catalysts effectively for the electrocatalytic reduction of CO2 to CO.
Keywords：ElectrocatalysisCO2 reductionCo-N-C catalystPhosphorus modification
Publication Date：2024-06-28
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 117-124 )