文献类型：期刊文献

英文题名：Bifunctional carbon elimination mechanism of CeO2 nanorod@Ni3Co7Phy core shell catalyst for CO2 reforming of methane

作者：He, Xiong Hu, Ziyi Liao, Mingyue An, Tingwei Kuang, Weiwei Wang, Keliang Li, Ziwei Liu, Fei Li, Min

第一作者：He, Xiong

通信作者：Li, ZW[1];Liu, F[1];Li, M[1];Li, M[2]

机构：[1]Guizhou Univ, Sch Chem & Chem Engn, Guizhou Prov Key Lab Green Chem & Clean Energy Tec, Guiyang 550025, Peoples R China;[2]Guizhou Inst Technol, Sch Civil Engn, Guiyang 550003, Peoples R China;[3]Liupanshui Normal Univ, Sch Chem & Mat Engn, Liupanshui 553004, Peoples R China

第一机构：Guizhou Univ, Sch Chem & Chem Engn, Guizhou Prov Key Lab Green Chem & Clean Energy Tec, Guiyang 550025, Peoples R China

通信机构：corresponding author), Guizhou Univ, Sch Chem & Chem Engn, Guizhou Prov Key Lab Green Chem & Clean Energy Tec, Guiyang 550025, Peoples R China;corresponding author), Guizhou Inst Technol, Sch Civil Engn, Guiyang 550003, Peoples R China.|贵州理工学院土木工程学院;贵州理工学院;

年份：2025

卷号：360

外文期刊名：SEPARATION AND PURIFICATION TECHNOLOGY

收录：;EI(收录号：20245017524261);Scopus(收录号：2-s2.0-85211580108);WOS:【SCI-EXPANDED(收录号:WOS:001389535200001)】；

基金：This work was supported by National Natural Science Foundation of China, China (22168013, 22279024), Young Top Talents Project of Science and Technology of Guizhou Province, China (Qianjiaoji [2024] 315), Key Laboratory of Carbon-based Energy Molecular Chemical Uti-lization Technology in Guizhou Province, China (2023008), Natural Science Foundation of Guizhou, China (ZK [2022] 074), National Foreign Expert Project, China (G2023038002L).

语种：英文

外文关键词：Bifunctional mechanism; Carbon elimination; CeO 2 nanorod; NiCo phyllosilicate; Oxidative Co site

摘要：CO2 capture and utilization via reforming of methane (DRM) is an efficient route to promote the achievement of the carbon neutralization goal. Whereas, the carbon deposition problem on cheap Ni-based catalysts slows down its industrial progress. Although Co doping to form NiCo bimetallic catalysts is effective to enhance the carbon resistance, the bifunctional carbon elimination mechanism has not been unveiled. Here, core shell structured CeO2@Ni7Co3Phy catalyst with high sintering and carbon resistance has been designed, exhibiting the stable CH4 and CO2 conversion of 72 % and 78 % respectively at 973 K for 120 h. The outstanding performance is due to the formation of Ni7Co3 bimetal, enhanced metal support interaction, and the highest surface Ni0 concentration, increasing sintering resistance and boosting the DRM activity. In situ diffuse infrared Fourier transform spectroscopy analysis and density functional theory calculations further confirm the bifunctional carbon elimination mechanism that both the oxygen vacancies in CeO2 and the electron deficient oxidative Co sites adsorb and activate CO2, providing oxygen species to eliminate carbon. By comparison, either serious Ni sintering and carbon accumulation or oxidation of Co0 phase due to excessive CO2 activation occurred for CeO2@NiPhy and CeO2@CoPhy catalyst respectively, leading to their worse DRM performance. The bifunctional carbon elimination mechanism illuminates the design of other carbon resistant catalysts.