1
|
Wang Y, Geng S, Liu F, Yao M, Ma J, Cao J, Li Z. Uncovering the role of yttrium in a cerium-based binary oxide in the catalytic conversion of carbon dioxide and methanol to dimethyl carbonate. J Colloid Interface Sci 2023; 652:1984-1993. [PMID: 37690306 DOI: 10.1016/j.jcis.2023.09.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Revised: 08/31/2023] [Accepted: 09/03/2023] [Indexed: 09/12/2023]
Abstract
Cerium(IV) oxide (CeO2)-based materials are effective catalysts for the synthesis of dimethyl carbonate (DMC) from carbon dioxide (CO2) and methanol (CH3OH). Herein, 5% Y-CeO2 was synthesized by the co-precipitation method. It forms a solid solution structure, which leads to the highest concentration of oxygen vacancies. The Y-VO-Ce active site created by Y3+ doping enhances the adsorption and activation of CO2 based on moderately passivating CH3OH adsorption. Consequently, 5% Y-CeO2 exhibited the highest CH3OH conversion rate of 0.8% and a DMC yield of 15 mmol⋅(g cat)-1, which is 1.4 times of pure CeO2 (reacting in a stainless-steel autoclave at 140 °C with a stirring speed of 1000 r⋅min-1 and an initial pressure of 3.0 MPa for 2 h). An adsorption test and in situ diffuse reflectance infrared Fourier transform spectroscopy showed that 5% Y-CeO2 could effectively inhibit the formation of triple-bonded methoxy species, and promote the formation of bidentate carbonate and bridged methoxy intermediates, which is conducive to the improvement of reaction activity.
Collapse
Affiliation(s)
- Yizhou Wang
- School of Chemistry and Chemical Engineering, Guizhou University, Guiyang, Guizhou 550025, PR China; Key Laboratory of Green Chemical and Clean Energy Technology, Guizhou University, Guiyang, Guizhou 550025, PR China; Engineering Research Center of Efficient Utilization for Industrial Waste, Guizhou University, Guiyang, Guizhou 550025, PR China
| | - Shuo Geng
- School of Chemistry and Chemical Engineering, Guizhou University, Guiyang, Guizhou 550025, PR China; Key Laboratory of Green Chemical and Clean Energy Technology, Guizhou University, Guiyang, Guizhou 550025, PR China; Engineering Research Center of Efficient Utilization for Industrial Waste, Guizhou University, Guiyang, Guizhou 550025, PR China
| | - Fei Liu
- School of Chemistry and Chemical Engineering, Guizhou University, Guiyang, Guizhou 550025, PR China; Key Laboratory of Green Chemical and Clean Energy Technology, Guizhou University, Guiyang, Guizhou 550025, PR China; Engineering Research Center of Efficient Utilization for Industrial Waste, Guizhou University, Guiyang, Guizhou 550025, PR China.
| | - Mengqin Yao
- School of Chemistry and Chemical Engineering, Guizhou University, Guiyang, Guizhou 550025, PR China; Key Laboratory of Green Chemical and Clean Energy Technology, Guizhou University, Guiyang, Guizhou 550025, PR China; Engineering Research Center of Efficient Utilization for Industrial Waste, Guizhou University, Guiyang, Guizhou 550025, PR China
| | - Jun Ma
- School of Chemistry and Chemical Engineering, Guizhou University, Guiyang, Guizhou 550025, PR China; Key Laboratory of Green Chemical and Clean Energy Technology, Guizhou University, Guiyang, Guizhou 550025, PR China; Engineering Research Center of Efficient Utilization for Industrial Waste, Guizhou University, Guiyang, Guizhou 550025, PR China
| | - Jianxin Cao
- School of Chemistry and Chemical Engineering, Guizhou University, Guiyang, Guizhou 550025, PR China; Key Laboratory of Green Chemical and Clean Energy Technology, Guizhou University, Guiyang, Guizhou 550025, PR China; Engineering Research Center of Efficient Utilization for Industrial Waste, Guizhou University, Guiyang, Guizhou 550025, PR China.
| | - Ziwei Li
- School of Chemistry and Chemical Engineering, Guizhou University, Guiyang, Guizhou 550025, PR China; Key Laboratory of Green Chemical and Clean Energy Technology, Guizhou University, Guiyang, Guizhou 550025, PR China; Engineering Research Center of Efficient Utilization for Industrial Waste, Guizhou University, Guiyang, Guizhou 550025, PR China
| |
Collapse
|
3
|
The Emergence of the Ubiquity of Cerium in Heterogeneous Oxidation Catalysis Science and Technology. Catalysts 2022. [DOI: 10.3390/catal12090959] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Research into the incorporation of cerium into a diverse range of catalyst systems for a wide spectrum of process chemistries has expanded rapidly. This has been evidenced since about 1980 in the increasing number of both scientific research journals and patent publications that address the application of cerium as a component of a multi-metal oxide system and as a support material for metal catalysts. This review chronicles both the applied and fundamental research into cerium-containing oxide catalysts where cerium’s redox activity confers enhanced and new catalytic functionality. Application areas of cerium-containing catalysts include selective oxidation, combustion, NOx remediation, and the production of sustainable chemicals and materials via bio-based feedstocks, among others. The newfound interest in cerium-containing catalysts stems from the benefits achieved by cerium’s inclusion, which include selectivity, activity, and stability. These benefits arise because of cerium’s unique combination of chemical and thermal stability, its redox active properties, its ability to stabilize defect structures in multicomponent oxides, and its propensity to stabilize catalytically optimal oxidation states of other multivalent elements. This review surveys the origins and some of the current directions in the research and application of cerium oxide-based catalysts.
Collapse
|