Preparation of nano Cu-Mo2C interface supported on ordered mesoporous biochar of ultrahigh surface area for reverse water gas shift reaction
Xueyuan Pan,
Hao Sun,
Mingzhe Ma,
Haiquan Liao,
Guowu Zhan,
Kui Wang,
Mengmeng Fan,
Jingcheng Xu,
Linfei Ding,
Kang Sun,
Jianchun Jiang
Affiliations
Xueyuan Pan
Key Lab. of Biomass Energy and Material, Jiangsu Province, Key and Open Lab. of Forest Chemical Engineering, SFA, National Engineering Lab. for Biomass Chemical Utilization, Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry
Hao Sun
Key Lab. of Biomass Energy and Material, Jiangsu Province, Key and Open Lab. of Forest Chemical Engineering, SFA, National Engineering Lab. for Biomass Chemical Utilization, Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry
Mingzhe Ma
Key Lab. of Biomass Energy and Material, Jiangsu Province, Key and Open Lab. of Forest Chemical Engineering, SFA, National Engineering Lab. for Biomass Chemical Utilization, Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry
Haiquan Liao
Key Lab. of Biomass Energy and Material, Jiangsu Province, Key and Open Lab. of Forest Chemical Engineering, SFA, National Engineering Lab. for Biomass Chemical Utilization, Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry
Guowu Zhan
Academy of Advanced Carbon Conversion Technology, College of Chemical Engineering, Huaqiao University
Kui Wang
Key Lab. of Biomass Energy and Material, Jiangsu Province, Key and Open Lab. of Forest Chemical Engineering, SFA, National Engineering Lab. for Biomass Chemical Utilization, Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry
Mengmeng Fan
Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University
Jingcheng Xu
Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University
Linfei Ding
Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University
Kang Sun
Key Lab. of Biomass Energy and Material, Jiangsu Province, Key and Open Lab. of Forest Chemical Engineering, SFA, National Engineering Lab. for Biomass Chemical Utilization, Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry
Jianchun Jiang
Key Lab. of Biomass Energy and Material, Jiangsu Province, Key and Open Lab. of Forest Chemical Engineering, SFA, National Engineering Lab. for Biomass Chemical Utilization, Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry
Abstract 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 m2 g–1) and mesopore volume of mesopore (0.81 cm3 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 (~ 6.1 nm) on the surface of MB. Cu+ species were formed from Cu0 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 °C, atmospheric pressure, and 300,000 ml/g/h gas hour space velocity, the CO2 conversion rate over Cu-Mo2C/MB reached 27.74 × 10–5 molCO2/gcat/s at very low H2 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. Graphical Abstract
