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Jia H, Du T, Li Y, Wang H, Yue Q, Zhou L, Wang Y. Preparation of catalyst for CO 2 hydrogenation reaction based on the idea of element sharing and preliminary exploration of catalytic mechanism. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024:10.1007/s11356-024-33959-7. [PMID: 39017874 DOI: 10.1007/s11356-024-33959-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2024] [Accepted: 06/06/2024] [Indexed: 07/18/2024]
Abstract
Under the background of the continuous rise of CO2 annual emissions, the development of CO2 capture and utilization technology is urgent. This study focuses on improving the catalytic capacity of the catalyst for CO2 hydrogenation, improving the efficiency of CO2 conversion to methanol, and converting H2 into chemical substances to avoid the danger of H2 storage. Based on the concept of element sharing, the ASMZ (Aluminum Shares Metal Zeolite catalysts) series catalyst was prepared by combining the CuO-ZnO-Al2O3 catalyst with the ZSM-5 zeolite using the amphoteric metal properties of the Al element. The basic structural properties of ASMZ catalysts were compared by XRD, FTIR, and BET characterization. Catalytic properties of samples were measured on a micro fixed-bed reactor. The catalytic mechanism of the catalyst was further analyzed by SEM, TEM, XPS, H2-TPR, and NH3-TPD. The results show that the ASMZ3 catalyst had the highest CO2 conversion rate (26.4%), the highest methanol selectivity (76.0%), and the lowest CO selectivity (15.3%) in this study. This is mainly due to the fact that the preparation method in this study promotes the exposure of effective weakly acidic sites and medium strength acidic sites (facilitating the hydrogenation of CO2 to methanol). At the same time, the close binding of Cu-ZnO-Al2O3 (CZA) and ZSM-5 zeolite also ensures the timely transfer of catalytic products and ensures the timely play of various catalytic active centers. The preparation method of the catalyst in this study also provides ideas for the preparation of other catalysts.
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Affiliation(s)
- He Jia
- State Environmental Protection Key Laboratory of Eco-Industry, Northeastern University, Shenyang, 110819, China
| | - Tao Du
- State Environmental Protection Key Laboratory of Eco-Industry, Northeastern University, Shenyang, 110819, China.
- National Frontiers Science Center for Industrial Intelligence and Systems Optimization, Northeastern University, Shenyang, 110819, China.
- Key Laboratory of Data Analytics and Optimization for Smart Industry (Northeastern University), Ministry of Education, Shenyang, China.
| | - Yingnan Li
- State Environmental Protection Key Laboratory of Eco-Industry, Northeastern University, Shenyang, 110819, China
| | - Heming Wang
- State Environmental Protection Key Laboratory of Eco-Industry, Northeastern University, Shenyang, 110819, China
| | - Qiang Yue
- State Environmental Protection Key Laboratory of Eco-Industry, Northeastern University, Shenyang, 110819, China
| | - Lifeng Zhou
- State Environmental Protection Key Laboratory of Eco-Industry, Northeastern University, Shenyang, 110819, China
| | - Yisong Wang
- State Environmental Protection Key Laboratory of Eco-Industry, Northeastern University, Shenyang, 110819, China
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Sun Y, Xiao L, Wu W. In Situ Carbon-Confined MoSe 2 Catalyst with Heterojunction for Highly Selective CO 2 Hydrogenation to Methanol. Molecules 2024; 29:2186. [PMID: 38792048 PMCID: PMC11123706 DOI: 10.3390/molecules29102186] [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: 04/11/2024] [Revised: 04/29/2024] [Accepted: 05/04/2024] [Indexed: 05/26/2024] Open
Abstract
The synthesis of methanol from CO2 hydrogenation is an effective measure to deal with global climate change and an important route for the chemical fixation of CO2. In this work, carbon-confined MoSe2 (MoSe2@C) catalysts were prepared by in situ pyrolysis using glucose as a carbon source. The physico-chemical properties and catalytic performance of CO2 hydrogenation to yield methanol were compared with MoSe2 and MoSe2/C. The results of the structure characterization showed MoSe2 displayed few layers and a small particle size. Owing to the synergistic effect of the Mo2C-MoSe2 heterojunction and in situ carbon doping, MoSe2@C with a suitable C/Mo mole ratio in the precursor showed excellent catalytic performance in the synthesis of methanol from CO2 hydrogenation. Under the optimal catalyst MoSe2@C-55, the selectivity of methanol reached 93.7% at a 9.7% conversion of CO2 under optimized reaction conditions, and its catalytic performance was maintained without deactivation during a continuous reaction of 100 h. In situ diffuse infrared Fourier transform spectroscopy studies suggested that formate and CO were the key intermediates in CO2 hydrogenation to methanol.
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Affiliation(s)
| | - Linfei Xiao
- National Center for International Research on Catalytic Technology, School of Chemistry and Material Sciences, Heilongjiang University, Harbin 150080, China;
| | - Wei Wu
- National Center for International Research on Catalytic Technology, School of Chemistry and Material Sciences, Heilongjiang University, Harbin 150080, China;
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Li W, Fu R, Shi J, Xiao Z, Xu Y, He D, He G, Chen H, Xie M. Mechanistic Insights into a Co(II)-Coordinated "Free" Metal Site of 2D Zinc-Based MOFs for β-Alkylation of Secondary Alcohols with Primary Alcohols. Inorg Chem 2023; 62:18689-18696. [PMID: 37897420 DOI: 10.1021/acs.inorgchem.3c03078] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/30/2023]
Abstract
Through in-depth study of the properties and reaction mechanisms of catalysts, it is possible to better optimize catalytic systems and improve reaction efficiency and selectivity. This remains one of the challenges in the field of catalysis. Therefore, the research and design of catalysts play crucial roles in understanding and optimizing catalytic reaction mechanisms. A robust 2D zinc-based MOFs (Zn-HA) supported Co(II) ion catalyst (Zn-HA@Co) has been designed and synthesized via a coordination-assisted strategy for β-alkylation of secondary alcohols with primary alcohols. The characterization demonstrated that the anchoring of Co(II) on Zn-HA via coordination could efficiently enhance the Co(II) ion dispersity and interaction between Co(II) and Zn-HA MOFs. Importantly, the density functional theory results have provided mechanistic insights into the energy of the HOMO and LUMO of the Zn-HA@Co catalyst as well as the energy change of the entire process after interacting with the reactants and the specific energy changes of each orbital. The synthesized Zn-HA@Co MOFs effectively lower the energy barrier of the catalytic reaction process. We expect that our research and design of catalysts will serve as valuable guideline for understanding and optimizing catalytic reaction mechanisms.
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Affiliation(s)
- Weizuo Li
- School of Petrochemical Engineering, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Rui Fu
- School of Petrochemical Engineering, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Jing Shi
- School of Petrochemical Engineering, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Zhenhao Xiao
- School of Petrochemical Engineering, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Yue Xu
- School of Petrochemical Engineering, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Dafang He
- School of Petrochemical Engineering, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Guangyu He
- School of Petrochemical Engineering, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Haiqun Chen
- School of Petrochemical Engineering, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Mingchen Xie
- School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
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Gao Y, Xiong K, Zhu B. Design of Cu/MoOx for CO2 Reduction via Reverse Water Gas Shift Reaction. Catalysts 2023. [DOI: 10.3390/catal13040684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023] Open
Abstract
CO2 reduction to CO as raw material for conversion to chemicals and gasoline fuels via the reverse water–gas shift (RWGS) reaction is generally acknowledged to be a promising strategy that makes the CO2 utilization process more economical and efficient. Cu-based catalysts are low-cost and have high catalytic performance but have insufficient stability due to hardening at high temperatures. In this work, a series of Cu-based catalysts supported by MoOx were synthesized for noble metal-free RWGS reactions, and the effects of MoOx support on catalyst performance were investigated. The results show that the introduction of MoOx can effectively improve the catalytic performance of RWGS reactions. The obtained Cu/MoOx (1:1) catalyst displays excellent activity with 35.85% CO2 conversion and 99% selectivity for CO at 400 °C. A combination of XRD, XPS, and HRTEM characterization results demonstrate that MoOx support enhances the metal-oxide interactions with Cu through electronic modification and geometric coverage, thus obtaining highly dispersed copper and more Cu-MoOx interfaces as well as more corresponding oxygen vacancies.
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Truong TT, Le TH, Pham TD. Adsorption characteristics of Copper (II) ion on Cu-doped ZnO nanomaterials based on green synthesis from Piper Chaudocanm L. leaves extract. Colloid Polym Sci 2022. [DOI: 10.1007/s00396-022-05028-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Kamsuwan T, Guntida A, Praserthdam P, Jongsomjit B. Differences in Deterioration Behaviors of Cu/ZnO/Al 2O 3 Catalysts with Different Cu Contents toward Hydrogenation of CO and CO 2. ACS OMEGA 2022; 7:25783-25797. [PMID: 35910179 PMCID: PMC9330176 DOI: 10.1021/acsomega.2c03068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Accepted: 07/04/2022] [Indexed: 06/15/2023]
Abstract
The deterioration behaviors of Cu/ZnO/Al2O3 (CZA) catalysts upon different Cu contents were elucidated. The fresh and spent catalysts after being used in CO and CO2 hydrogenation at 250 °C under atmospheric pressure were properly characterized using various techniques including X-ray powder diffraction, X-ray photoelectron spectroscopy, and temperature-programmed reduction for the changes of metal sites, while the textural and chemical properties and carbon deposition on spent CZA catalysts were analyzed by N2 physisorption, energy-dispersive X-ray spectroscopy, and temperature-programmed oxidation. During the hydrogenation reaction for both CO and CO2, the unstable Cu0 site on the spent CZA catalyst having a low Cu loading (sCZA-L) was oxidized to CuO and the aggregation of metal crystallite sites (Cu-ZnO and ZnO) was observed. Moreover, the amount of carbon deposition on sCZA-L (ca. >2%) is higher than the spent CZA catalyst having a high Cu loading (sCZA-H, ca. <0.5%). These phenomena led to a decrease in the surface area and the blockage of active sites. These findings can be determined on the catalytic deactivation and the obvious decrease in the catalytic activity of the CZA catalyst having a low Cu content (CZA-L, Cu:Zn = 0.8).
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Wang HL, Zhao YL, Zhao HX, Yang JX, Zhai D, Sun L, Deng WQ. In Silico Design of Metal-Free Hydrophosphate Catalysts for Hydrogenation of CO2 to Formate. Phys Chem Chem Phys 2022; 24:2901-2908. [DOI: 10.1039/d1cp04582b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
CO2 reduction by H2 using metal-free catalysts is highly challenging. Frustrated Lewis pairs (FLPs) have been considered potential metal-free catalysts for this reaction. However, most FLPs are unstable, which limits...
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