文献类型：期刊文献

英文题名：Preparation of nano Cu-Mo₂C interface supported on ordered mesoporous biochar of ultrahigh surface area for reverse water gas shift reaction

作者：Pan, Xueyuan[1] Sun, Hao[1] Ma, Mingzhe[1] Liao, Haiquan[1] Zhan, Guowu[2] Wang, Kui[1,3] Fan, Mengmeng[3] Xu, Jingcheng[3] Ding, Linfei[3] Sun, Kang[1] Jiang, Jianchun[1]

第一作者：Pan, Xueyuan

通信作者：Sun, H[1];Wang, K[1];Zhan, GW[2];Wang, K[3]

机构：[1]Chinese Acad Forestry, Inst Chem Ind Forest Prod, Key Lab Biomass Energy & Mat Jiangsu Prov,SFA,Natl, Key & Open Lab Forest Chem Engn, Nanjing 210042, Jiangsu, Peoples R China;[2]Huaqiao Univ, Acad Adv Carbon Convers Technol, Coll Chem Engn, Xiamen 361021, Fujian, Peoples R China;[3]Nanjing Forestry Univ, Coinnovat Ctr Efficient Proc & Utilizat Forest Res, Nanjing 210042, Peoples R China

年份：2024

卷号：6

期号：1

外文期刊名：BIOCHAR

收录：;Scopus(收录号：2-s2.0-85207517381);WOS:【SCI-EXPANDED(收录号:WOS:001341075200001)】；

基金：We would like to thank the funding of National Natural Science Foundation of China and National Key Research and Development Program of China. We would like to express our gratitude to all those who helped us during the writing of this paper.

语种：英文

外文关键词：CO2 utilization; Reversed water gas shift; Cu-Mo2C interface; Mesoporous biochar; High conversion rate

摘要：High conversion rate and selectivity are challenges for CO2 utilization through catalytic reverse water gas shift (RWGS) reaction. Herein, a novel mesoporous biochar (MB) supported Cu-Mo2C nano-interface was prepared by consecutive physical activation of coconut shells followed by carbothermal hydrogen reduction of bimetal. As compared with traditional carbon materials, this MB exhibited ultra-high specific surface area (2693 m(2) g(-1)) and mesopore volume of mesopore (0.81 cm(3) g(-1)) with a narrow distribution (2-5 nm), responsible for the high dispersion of binary Cu-Mo2C sites, CO2 adsorption and mass transfer in the reaction system. Moderate carbothermal reduction led to the sufficient reduction of Mo ion with carbon matrix of MB and dispersive growth of nano Cu-Mo2C binary sites (similar to 6.1 nm) on the surface of MB. Cu+ species were formed from Cu-0 via electron transfer and showed high dispersion with simultaneous boosted bimetal loading due to the strong interaction between nano Mo2C and Cu. These were advantageous to the intrinsic activity and stability of the Cu-Mo2C binary sites and their accessibility to the reactant molecules. Under the RWGS reaction conditions of 500 degrees C, atmospheric pressure, and 300,000 ml/g/h gas hour space velocity, the CO2 conversion rate over Cu-Mo2C/MB reached 27.74 x 10(-5) mol(CO2)/g(cat)/s at very low H-2 partial pressure, which was more than twice that over traditional carbon supported Cu-Mo2C catalysts. In addition, this catalyst exhibited 99.08% CO selectivity and high stability for more than 50 h without a decrease in activity and selectivity. This study offers a new development strategy and a promising candidate for industrial RWGS.