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Phongprueksathat N, Ting KW, Mine S, Jing Y, Toyoshima R, Kondoh H, Shimizu KI, Toyao T, Urakawa A. Bifunctionality of Re Supported on TiO 2 in Driving Methanol Formation in Low-Temperature CO 2 Hydrogenation. ACS Catal 2023; 13:10734-10750. [PMID: 37614518 PMCID: PMC10442859 DOI: 10.1021/acscatal.3c01599] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Revised: 07/14/2023] [Indexed: 08/25/2023]
Abstract
Low temperature and high pressure are thermodynamically more favorable conditions to achieve high conversion and high methanol selectivity in CO2 hydrogenation. However, low-temperature activity is generally very poor due to the sluggish kinetics, and thus, designing highly selective catalysts active below 200 °C is a great challenge in CO2-to-methanol conversion. Recently, Re/TiO2 has been reported as a promising catalyst. We show that Re/TiO2 is indeed more active in continuous and high-pressure (56 and 331 bar) operations at 125-200 °C compared to an industrial Cu/ZnO/Al2O3 catalyst, which suffers from the formation of methyl formate and its decomposition to carbon monoxide. At lower temperatures, precise understanding and control over the active surface intermediates are crucial to boosting conversion kinetics. This work aims at elucidating the nature of active sites and active species by means of in situ/operando X-ray absorption spectroscopy, Raman spectroscopy, ambient-pressure X-ray photoelectron spectroscopy (AP-XPS), and diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS). Transient operando DRIFTS studies uncover the activation of CO2 to form active formate intermediates leading to methanol formation and also active rhenium carbonyl intermediates leading to methane over cationic Re single atoms characterized by rhenium tricarbonyl complexes. The transient techniques enable us to differentiate the active species from the spectator one on TiO2 support, such as less reactive formate originating from spillover and methoxy from methanol adsorption. The AP-XPS supports the fact that metallic Re species act as H2 activators, leading to H-spillover and importantly to hydrogenation of the active formate intermediate present over cationic Re species. The origin of the unique reactivity of Re/TiO2 was suggested as the coexistence of cationic highly dispersed Re including single atoms, driving the formation of monodentate formate, and metallic Re clusters in the vicinity, activating the hydrogenation of the formate to methanol.
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Affiliation(s)
- Nat Phongprueksathat
- Catalysis
Engineering, Department of Chemical Engineering, Delft University of Technology, Van der Maasweg 9, Delft 2629 HZ, Netherlands
| | - Kah Wei Ting
- Institute
for Catalysis, Hokkaido University, N-21, W-10, Sapporo 001-0021, Japan
| | - Shinya Mine
- Institute
for Catalysis, Hokkaido University, N-21, W-10, Sapporo 001-0021, Japan
| | - Yuan Jing
- Institute
for Catalysis, Hokkaido University, N-21, W-10, Sapporo 001-0021, Japan
| | - Ryo Toyoshima
- Department
of Chemistry, Keio University, 3-14-1 Hiyoshi,
Kohoku-ku, Yokohama 223-8522, Japan
| | - Hiroshi Kondoh
- Department
of Chemistry, Keio University, 3-14-1 Hiyoshi,
Kohoku-ku, Yokohama 223-8522, Japan
| | - Ken-ichi Shimizu
- Institute
for Catalysis, Hokkaido University, N-21, W-10, Sapporo 001-0021, Japan
| | - Takashi Toyao
- Institute
for Catalysis, Hokkaido University, N-21, W-10, Sapporo 001-0021, Japan
| | - Atsushi Urakawa
- Catalysis
Engineering, Department of Chemical Engineering, Delft University of Technology, Van der Maasweg 9, Delft 2629 HZ, Netherlands
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Scattolin T, Simoens A, Stevens CV, Nolan SP. Flow chemistry of main group and transition metal complexes. TRENDS IN CHEMISTRY 2022. [DOI: 10.1016/j.trechm.2022.04.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Immobilization of an Iridium(I)-NHC-Phosphine Catalyst for Hydrogenation Reactions under Batch and Flow Conditions. Catalysts 2021. [DOI: 10.3390/catal11060656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Na2[Ir(cod)(emim)(mtppts)] (1) with high catalytic activity in various organic- and aqueous-phase hydrogenation reactions was immobilized on several types of commercially available ion-exchange supports. The resulting heterogeneous catalyst was investigated in batch reactions and in an H-Cube flow reactor in the hydrogenation of phenylacetylene, diphenylacetylene, 1-hexyne, and benzylideneacetone. Under proper conditions, the catalyst was highly selective in the hydrogenation of alkynes to alkenes, and demonstrated excellent selectivity in C=C over C=O hydrogenation; furthermore, it displayed remarkable stability. Activity of 1 in hydrogenation of levulinic acid to γ-valerolactone was also assessed.
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Modak A, Ghosh A, Bhaumik A, Chowdhury B. CO 2 hydrogenation over functional nanoporous polymers and metal-organic frameworks. Adv Colloid Interface Sci 2021; 290:102349. [PMID: 33780826 DOI: 10.1016/j.cis.2020.102349] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 12/16/2020] [Accepted: 12/16/2020] [Indexed: 12/21/2022]
Abstract
CO2 is one of the major environmental pollutants and its mitigation is attracting huge attention over the years due to continuous increase in this greenhouse gas emission in the atmosphere. Being environmentally hazardous and plentiful presence in nature, CO2 utilization as C1 resource into fuels and feedstock is very demanding from the green chemistry perspectives. To accomplish this CO2 utilization issue, functional organic materials like porous organic polymers (POPs), covalent organic frameworks (COFs) as well as organic-inorganic hybrid materials like metal-organic frameworks (MOFs), having characteristics of large surface area, high thermal stability and tunability in the porous nanostructures play significant role in designing the suitable catalyst for the CO2 hydrogenation reactions. Although CO2 hydrogenation is a widely studied and emerging area of research, till date review exclusively focused on designing POPs, COFs and MOFs bearing reactive functional groups is very limited. A thorough literature review on this matter will enrich our knowledge over the CO2 hydrogenation processes and the catalytic sites responsible for carrying out these chemical transformations. We emphasize recent state-of-the art developments in POPs/COFs/MOFs having unique functionalities and topologies in stabilizing metallic NPs and molecular complexes for the CO2 reduction reactions. The major differences between MOFs and porous organics are critically summarized in the outlook section with the aim of the future benefit in mitigating CO2 emission from ambient air.
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Abstract
Formic acid (HCOOH) as an inexpensive and versatile reagent has gained broad
attention in the field of green synthesis and chemical industry. Formic acid acts not only as a
convenient and less toxic CO surrogate, but also as an excellent formylative reagent, C1
source and hydrogen donor in organic reactions. Over the past decades, many exciting contributions
have been made which have helped chemists to understand the mechanisms of these
reactions. The review will examine recent advances in the utilization of formic acid as an
economical, practical and multipurpose reactant in synthetic transformations.
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Affiliation(s)
- Xiao-Hua Cai
- School of Chemical Engineering, Guizhou Minzu University, Guiyang 550025, China
| | - Su-qian Cai
- School of Pharmaceutical Sciences, Shenyang Pharmaceutical University, Shenyang 117004, China
| | - Bing Xie
- School of Chemical Engineering, Guizhou Minzu University, Guiyang 550025, China
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Park H, Park K, Jung KD, Yoon S. CO2 hydrogenation into formate and methyl formate using Ru molecular catalysts supported on NNN pincer porous organic polymers. Inorg Chem Front 2021. [DOI: 10.1039/d0qi01123a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The Ru molecular catalyst immobilized on the porous organic polymer containing the NNN-pincer motif efficiently promoted the hydrogenation of CO2 into formate derivatives.
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Affiliation(s)
- Hongjin Park
- Department of Chemistry
- Chung-Ang University
- Seoul
- Republic of Korea
| | - Kwangho Park
- Clean Energy Research Centre
- Korea Institute of Science and Technology
- Seoul
- Republic of Korea
| | - Kwang-Deog Jung
- Clean Energy Research Centre
- Korea Institute of Science and Technology
- Seoul
- Republic of Korea
| | - Sungho Yoon
- Department of Chemistry
- Chung-Ang University
- Seoul
- Republic of Korea
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Hussong C, Langanke J, Leitner W. Carbon2Polymer: A CO
2
‐based Route to Polyurethanes via Oxidative Carbonylation of TDA with Methyl Formate. CHEM-ING-TECH 2020. [DOI: 10.1002/cite.202000031] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Christine Hussong
- RWTH-Aachen University CAT Catalytic Center Worringerweg 2 52074 Aachen Germany
| | - Jens Langanke
- RWTH-Aachen University CAT Catalytic Center Worringerweg 2 52074 Aachen Germany
- Covestro Deutschland AG Catalysis and Technology Incubation Kaiser-Wilhelm-Allee 60 51368 Leverkusen Germany
| | - Walter Leitner
- RWTH-Aachen University CAT Catalytic Center Worringerweg 2 52074 Aachen Germany
- Max-Planck-Institut für Chemische Energiekonversion Stiftstraße 34–36 45470 Mülheim an der Ruhr Germany
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