文献类型：期刊文献

英文题名：Low-content doped CoMOx (M = Co, Fe, Ni, Cu) spinel derived from kolwezite-like carbonate hydroxide for low-temperature CO oxidation with enhanced water and sulfur resistance

作者：Liu, Yiqi[1];Ma, Cheng[2];Wang, Jitong[1,3];Qiao, Wenming[1];Ling, Licheng[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Green Chem Engn & Ind Catalysis, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Specially Funct Polymer Mat & Related Tech, Minist Educ, Shanghai 200237, Peoples R China;[3]Guangxi Univ, Sch Chem & Chem Engn, Guangxi Key Lab Petrochem Resource Proc & Proc Int, Nanning 530004, Peoples R China

年份：2025

卷号：13

期号：3

外文期刊名：JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING

收录：;EI(收录号：20251918380136);WOS:【SCI-EXPANDED(收录号:WOS:001471733900001)】；

基金：This work was partly supported by the National Natural Science Foundation of China (22178107, U21A2060, 22178116) .

语种：英文

外文关键词：CO catalytic oxidation; Spinel catalyst; H 2 O resistance; SO 2 resistance; Regeneration

摘要：Cobalt-based spinel catalysts have emerged as low-cost alternatives to precious metals for catalyzing the oxidation of harmful CO to CO2. However, challenges such as resistance to sulfur and water still hinder their broader industrial adoption. In this study, low-content doped CoMOx (M = Co, Fe, Ni, Cu) spinel catalysts were synthesized via the thermal decomposition of kolwezite-like bimetallic carbonate hydroxides. The sheet structure of the CoMOx facilitates the exposure of active sites and improves gas diffusion. CoNiOx demonstrated excellent low-temperature catalytic activity, attributed to a higher proportion of Co3+ and Oads, achieving a 100 % CO conversion at 120 degrees C. Meanwhile, CoCuOx exhibited outstanding resistance to H2O and SO2 poisoning. Sulfates formed due to SO2 adsorption on the catalyst surface could be effectively removed by ammonia water treatment, restoring catalytic activity. DFT calculation reveals that doping enhances CO adsorption, reduces activation energy barriers, and facilitates oxidation processes. These findings provide an insight into the development of efficient and economical catalysts suitable for CO oxidation.