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Thanh HT, Le OK, Chihaia V, Son DN. Carbon dioxide conversion to methanol on a PdCo bimetallic catalyst. Phys Chem Chem Phys 2024; 26:3963-3973. [PMID: 38221854 DOI: 10.1039/d3cp05146c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2024]
Abstract
The CO2 conversion to methanol (CO2-to-CH3OH conversion) is a promising way to resolve greenhouse gas emissions and global energy shortage. Many catalysts are of interest in improving the efficiency of the conversion reaction. The PdCo alloy is a potential catalyst, but no research is available to clarify the CO2-to-CH3OH reaction mechanism of this alloy. Here, using density functional theory combined with the thermodynamic model, we elucidated the reaction mechanism of the CO2-to-CH3OH conversion on the Pd-skin/PdCo alloy catalyst via thermo- and electro-catalytic processes. The adsorption of CO2-to-CH3OH intermediates with key stable intermediates such as HCOO, COOH, and CO was explored. Free-energy diagrams for the CO2-to-CH3OH conversion were constructed. We found that the formate pathway is the most favorable one. The charge transfer plays a crucial role in the substrate-adsorbate interaction via electronic structure analysis. This work provides valuable guidance for designing Pd-based catalysts for the CO2-to-CH3OH conversion.
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Affiliation(s)
- Huynh Tat Thanh
- Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Vietnam.
- Vietnam National University Ho Chi Minh City, Linh Trung Ward, Ho Chi Minh City, Vietnam
- An Giang University, VNU-HCM, 18 Ung Van Khiem street, Dong Xuyen ward, Long Xuyen City, An Giang Province, Vietnam
| | - Ong Kim Le
- Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Vietnam.
- Vietnam National University Ho Chi Minh City, Linh Trung Ward, Ho Chi Minh City, Vietnam
| | - Viorel Chihaia
- Institute of Physical Chemistry "Ilie Murgulescu" of the Romanian Academy, Splaiul Independentei 202, Sector 6, 060021 Bucharest, Romania
| | - Do Ngoc Son
- Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Vietnam.
- Vietnam National University Ho Chi Minh City, Linh Trung Ward, Ho Chi Minh City, Vietnam
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Neog S, Dowerah D, Biswakarma N, Dutta P, Churi PP, Sarma PJ, Gour NK, Deka RC. Reaction Mechanism and Kinetics for the Selective Hydrogenation of Carbon Dioxide to Formic Acid and Methanol over the [Cu 2] 0,±1 Dimer. J Phys Chem A 2023; 127:8508-8529. [PMID: 37811794 DOI: 10.1021/acs.jpca.3c03609] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/10/2023]
Abstract
With the rapid growth of industrialization, deforestation, and burning of fossil fuels, undeniably there has been an incredible escalation of the CO2 concentration in the atmosphere. In order to mitigate the problem, the capture and utilization of CO2 in different value-added chemicals have thus remained topics of concerned research for more than a decade. Accordingly, we have performed molecular -level catalytic hydrogenation of CO2 to formic acid using bare [Cu2]0,±1 dimers as catalysts. The entire investigation has been performed using a density functional theory (DFT) method employing the Perdew-Burke-Ernzerhof (PBE) functional with the def2TZVPP basis set to explore the different possible routes and efficiency of the catalysts. Results reveal the feasibility of H2 dissociation on all three Cu2, Cu2+, and Cu2- dimers. The negatively charged hydride formed during H2 dissociation on Cu2 and Cu2+ dimers facilitates the formation of the HCOO* intermediate over COOH*, thereby providing product selectivity for HCOOH above CO. However, the reaction on the Cu2- dimer forms both HCOO* and COOH* intermediates, but HCOO*, being kinetically more favorable, results in HCOOH production. The free-energy change suggests that the complete reaction on Cu2 and Cu2+ dimers forms a stable product compared to the Cu2- dimer. Furthermore, H3COH production is studied using the title catalysts via the obtained HCOOH* intermediate from the reaction channel. Transition state theory (TST) has been considered to evaluate the rate constants for each step of the reaction. Overall results suggest Cu2 to be better compared to Cu2+ and Cu2- dimers for HCOOH formation and Cu2+ over Cu2 and Cu2- dimers to be more efficient for H3COH formation. This work opens the way for further investigation of the reaction mechanism and development of an efficient catalyst for CO2 hydrogenation.
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Affiliation(s)
- Shilpa Neog
- CMML-Catalysis and Molecular Modelling Laboratory, Department of Chemical Sciences, Tezpur University, Tezpur, Napaam-784028, Assam, India
| | - Dikshita Dowerah
- CMML-Catalysis and Molecular Modelling Laboratory, Department of Chemical Sciences, Tezpur University, Tezpur, Napaam-784028, Assam, India
| | - Nishant Biswakarma
- CMML-Catalysis and Molecular Modelling Laboratory, Department of Chemical Sciences, Tezpur University, Tezpur, Napaam-784028, Assam, India
| | - Priyanka Dutta
- CMML-Catalysis and Molecular Modelling Laboratory, Department of Chemical Sciences, Tezpur University, Tezpur, Napaam-784028, Assam, India
| | - Partha Pratim Churi
- CMML-Catalysis and Molecular Modelling Laboratory, Department of Chemical Sciences, Tezpur University, Tezpur, Napaam-784028, Assam, India
- Department of Chemistry, Dergaon Kamal Dowerah College, Dergaon-785614, Assam, India
| | - Plaban Jyoti Sarma
- CMML-Catalysis and Molecular Modelling Laboratory, Department of Chemical Sciences, Tezpur University, Tezpur, Napaam-784028, Assam, India
- Department of Chemistry, Gargaon College, Simaluguri-785686, Sivsagar, Assam, India
| | - Nand Kishor Gour
- CMML-Catalysis and Molecular Modelling Laboratory, Department of Chemical Sciences, Tezpur University, Tezpur, Napaam-784028, Assam, India
| | - Ramesh Chandra Deka
- CMML-Catalysis and Molecular Modelling Laboratory, Department of Chemical Sciences, Tezpur University, Tezpur, Napaam-784028, Assam, India
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Guo D, Liu J, Zhao X, Yang X, Chen X. Comparative computational study of CO2 hydrogenation and dissociation on metal-doped Pd clusters. Sep Purif Technol 2023. [DOI: 10.1016/j.seppur.2023.123462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
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