1
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Cheng M, Shen S, Zhang Z, Niu K, Wang N. Diiron Complexes with Rigid and Conjugated S-to-S Bridges for Electrocatalytic Reduction of CO 2. Inorg Chem 2024. [PMID: 39106257 DOI: 10.1021/acs.inorgchem.4c00756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/09/2024]
Abstract
Electroreduction of CO2 to value-added low-carbon chemicals is a promising way for carbon neutrality and CO2 utilization. It was found that the diiron complex [(μ-bdt)Fe2(CO)6] (bdt = benzene-1,2-dithiolate) has high catalytic activity for electrocatalytic CO2 reduction. To further study the effect of the S-to-S bridge on the catalytic performances of diiron complexes for electrochemical CO2 reduction, four diiron complexes 1-4 with different rigid and conjugated S-to-S bridges were either selected or designed. The electrocatalytic studies showed that under optimal conditions, 2 with a 2,3-naphthalenedithiolato bridge exhibited the lowest catalytic onset potential (Eonset = -1.75 V vs Fc+/0), while 4 with a diphenyl-1,2-vinylidene bridge displayed the highest catalytic activity (TOFmax = 295 s-1), which is 1.5 times that of [(μ-bdt)Fe2(CO)6]. The controlled potential electrolysis experiments of 4 in 0.1 M MeOH/MeCN at -2.35 V vs Fc+/0 gave a total faradaic yield close to 100%, with selectivities of 77%, 9%, and 14% for HCOOH, CO, and H2, respectively. The mechanism for CO2 reduction was studied using density functional theory, IR spectroelectrochemistry, and electrochemical methods. The results indicate that modifying the structure of the S-to-S bridge is an effective strategy to improve the catalytic performance of diiron complexes for electrocatalytic CO2 reduction.
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Affiliation(s)
- Minglun Cheng
- Hebei Key Laboratory of Active Components and Functions in Natural Products, College of Chemical Engineering, Hebei Normal University of Science and Technology, Qinhuangdao 066004, China
- Key Laboratory of Synthetic and Natural Functional Molecule of Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an 710069, China
| | - Sibo Shen
- Hebei Key Laboratory of Active Components and Functions in Natural Products, College of Chemical Engineering, Hebei Normal University of Science and Technology, Qinhuangdao 066004, China
| | - Zhiwei Zhang
- Hebei Key Laboratory of Active Components and Functions in Natural Products, College of Chemical Engineering, Hebei Normal University of Science and Technology, Qinhuangdao 066004, China
| | - Kui Niu
- Hebei Key Laboratory of Active Components and Functions in Natural Products, College of Chemical Engineering, Hebei Normal University of Science and Technology, Qinhuangdao 066004, China
| | - Ning Wang
- Key Laboratory of Synthetic and Natural Functional Molecule of Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an 710069, China
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, China
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2
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Li M, Huang F, Zhang P, Xiong Y, Zhang Y, Li F, Chen L. Electrochemical CO 2 Reduction by Urea Hangman Mn Terpyridine species. Chemistry 2024; 30:e202304218. [PMID: 38362832 DOI: 10.1002/chem.202304218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Revised: 02/02/2024] [Accepted: 02/15/2024] [Indexed: 02/17/2024]
Abstract
Based on our previous study in chemical subtleties of the proton tunneling distance for metal hydride formation (PTD-MH) to regulate the selectivity of CO2 reduction reaction (CO2RR), we have developed a family of Mn terpyridine derivatives, in which urea groups functions as multipoint hydrogen-bonding hangman to accelerate the reaction rate. We found that such changes to the second coordination sphere significantly increased the turnover frequency (TOF) for CO2 reduction to ca. 360s - 1 ${{s}^{-1}}$ with this family of molecular catalysts while maintaining high selectivity (ca. 100 %±3) for CO even in the presence of a large amount of phenol as proton source. Notably, the compounds studied in this manuscript all exhibit large value fori c a t / i p ${{{\bf i}}_{{\bf c a t}}/{{\bf i}}_{{\bf p}}}$ as that achieved by Fe porphyrins derivates, while saving up to 0.55 V in overpotential with respect to the latter.
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Affiliation(s)
- Minghong Li
- State Key Laboratory of Environment-Friendly Energy Material, School of Materials and Chemistry, Southwest University of Science and Technology, Mianyang, 621010, P. R. China
| | - Fang Huang
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan, 250014, P. R. China
| | - Ping Zhang
- State Key Laboratory of Environment-Friendly Energy Material, School of Materials and Chemistry, Southwest University of Science and Technology, Mianyang, 621010, P. R. China
| | - Ying Xiong
- State Key Laboratory of Environment-Friendly Energy Material, School of Materials and Chemistry, Southwest University of Science and Technology, Mianyang, 621010, P. R. China
| | - Yaping Zhang
- State Key Laboratory of Environment-Friendly Energy Material, School of Materials and Chemistry, Southwest University of Science and Technology, Mianyang, 621010, P. R. China
| | - Fei Li
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, 116024, P. R. China
| | - Lin Chen
- State Key Laboratory of Environment-Friendly Energy Material, School of Materials and Chemistry, Southwest University of Science and Technology, Mianyang, 621010, P. R. China
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3
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Yang Y, Xie F, Chen J, Qiu S, Qiang N, Lu M, Peng Z, Yang J, Liu G. Electrocatalytic Reduction of CO 2 to CO by Molecular Cobalt-Polypyridine Diamine Complexes. Molecules 2024; 29:1694. [PMID: 38675514 PMCID: PMC11051790 DOI: 10.3390/molecules29081694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2024] [Revised: 04/02/2024] [Accepted: 04/08/2024] [Indexed: 04/28/2024] Open
Abstract
Cobalt complexes have previously been reported to exhibit high faradaic efficiency in reducing CO2 to CO. Herein, we synthesized capsule-like cobalt-polypyridine diamine complexes [Co(L1)](BF4)2 (1) and [Co(L2) (CH3CN)](BF4)2 (2) as catalysts for the electrocatalytic reduction of CO2. Under catalytic conditions, complexes 1 and 2 demonstrated the electrocatalytic reduction of CO2 to CO in the presence or absence of CH3OH as a proton source. Experimental and computational studies revealed that complexes 1 and 2 undergo two consecutive reversible one-electron reductions on the cobalt core, followed by the addition of CO2 to form a metallocarboxylate intermediate [CoII(L)-CO22-]0. This crucial reaction intermediate, which governs the catalytic cycle, was successfully detected using high resolution mass spectrometry (HRMS). In situ Fourier-transform infrared spectrometer (FTIR) analysis showed that methanol can enhance the rate of carbon-oxygen bond cleavage of the metallocarboxylate intermediate. DFT studies on [CoII(L)-CO22-]0 have suggested that the doubly reduced species attacks CO2 on the C atom through the dz2 orbital, while the interaction with CO2 is further stabilized by the π interaction between the metal dxz or dxz orbital with p orbitals on the O atoms. Further reductions generate a metal carbonyl intermediate [CoI(L)-CO]+, which ultimately releases CO.
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Affiliation(s)
- Yong Yang
- School of Chemistry and Materials Engineering, Huizhou University, Huizhou 516001, China; (F.X.); (J.C.); (S.Q.); (N.Q.); (M.L.); (Z.P.); (G.L.)
| | - Fang Xie
- School of Chemistry and Materials Engineering, Huizhou University, Huizhou 516001, China; (F.X.); (J.C.); (S.Q.); (N.Q.); (M.L.); (Z.P.); (G.L.)
| | - Jiahui Chen
- School of Chemistry and Materials Engineering, Huizhou University, Huizhou 516001, China; (F.X.); (J.C.); (S.Q.); (N.Q.); (M.L.); (Z.P.); (G.L.)
| | - Si Qiu
- School of Chemistry and Materials Engineering, Huizhou University, Huizhou 516001, China; (F.X.); (J.C.); (S.Q.); (N.Q.); (M.L.); (Z.P.); (G.L.)
| | - Na Qiang
- School of Chemistry and Materials Engineering, Huizhou University, Huizhou 516001, China; (F.X.); (J.C.); (S.Q.); (N.Q.); (M.L.); (Z.P.); (G.L.)
| | - Ming Lu
- School of Chemistry and Materials Engineering, Huizhou University, Huizhou 516001, China; (F.X.); (J.C.); (S.Q.); (N.Q.); (M.L.); (Z.P.); (G.L.)
| | - Zhongli Peng
- School of Chemistry and Materials Engineering, Huizhou University, Huizhou 516001, China; (F.X.); (J.C.); (S.Q.); (N.Q.); (M.L.); (Z.P.); (G.L.)
| | - Jing Yang
- College of Health Science and Environmental Engineering, Shenzhen Technology University, Shenzhen 518118, China
| | - Guocong Liu
- School of Chemistry and Materials Engineering, Huizhou University, Huizhou 516001, China; (F.X.); (J.C.); (S.Q.); (N.Q.); (M.L.); (Z.P.); (G.L.)
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4
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Xiao Y, Xie F, Zhang HT, Zhang MT. Bioinspired Binickel Catalyst for Carbon Dioxide Reduction: The Importance of Metal-ligand Cooperation. JACS AU 2024; 4:1207-1218. [PMID: 38559717 PMCID: PMC10976602 DOI: 10.1021/jacsau.4c00047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Revised: 02/17/2024] [Accepted: 02/21/2024] [Indexed: 04/04/2024]
Abstract
Catalyst design for the efficient CO2 reduction reaction (CO2RR) remains a crucial challenge for the conversion of CO2 to fuels. Natural Ni-Fe carbon monoxide dehydrogenase (NiFe-CODH) achieves reversible conversion of CO2 and CO at nearly thermodynamic equilibrium potential, which provides a template for developing CO2RR catalysts. However, compared with the natural enzyme, most biomimetic synthetic Ni-Fe complexes exhibit negligible CO2RR catalytic activities, which emphasizes the significance of effective bimetallic cooperation for CO2 activation. Enlightened by bimetallic synergy, we herein report a dinickel complex, NiIINiII(bphpp)(AcO)2 (where NiNi(bphpp) is derived from H2bphpp = 2,9-bis(5-tert-butyl-2-hydroxy-3-pyridylphenyl)-1,10-phenanthroline) for electrocatalytic reduction of CO2 to CO, which exhibits a remarkable reactivity approximately 5 times higher than that of the mononuclear Ni catalyst. Electrochemical and computational studies have revealed that the redox-active phenanthroline moiety effectively modulates the electron injection and transfer akin to the [Fe3S4] cluster in NiFe-CODH, and the secondary Ni site facilitates the C-O bond activation and cleavage through electron mediation and Lewis acid characteristics. Our work underscores the significant role of bimetallic cooperation in CO2 reduction catalysis and provides valuable guidance for the rational design of CO2RR catalysts.
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Affiliation(s)
- Yao Xiao
- Center of Basic Molecular
Science (CBMS), Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Fei Xie
- Center of Basic Molecular
Science (CBMS), Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Hong-Tao Zhang
- Center of Basic Molecular
Science (CBMS), Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Ming-Tian Zhang
- Center of Basic Molecular
Science (CBMS), Department of Chemistry, Tsinghua University, Beijing 100084, China
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5
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Yong WW, Zhang HT, Guo YH, Xie F, Zhang MT. Redox-Active Ligand Assisted Multielectron Catalysis: A Case of Electrocatalyzed CO 2-to-CO Conversion. ACS ORGANIC & INORGANIC AU 2023; 3:384-392. [PMID: 38075450 PMCID: PMC10704577 DOI: 10.1021/acsorginorgau.3c00027] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2023] [Revised: 07/31/2023] [Accepted: 08/10/2023] [Indexed: 03/16/2024]
Abstract
The selective reduction of carbon dioxide remains a significant challenge due to the complex multielectron/proton transfer process, which results in a high kinetic barrier and the production of diverse products. Inspired by the electrostatic and H-bonding interactions observed in the second sphere of the [NiFe]-CODH enzyme, researchers have extensively explored these interactions to regulate proton transfer, stabilize intermediates, and ultimately improve the performance of catalytic CO2 reduction. In this work, a series of cobalt(II) tetraphenylporphyrins with varying numbers of redox-active nitro groups were synthesized and evaluated as CO2 reduction electrocatalysts. Analyses of the redox properties of these complexes revealed a consistent relationship between the number of nitro groups and the corresponding accepted electron number of the ligand at -1.59 V vs. Fc+/0. Among the catalysts tested, TNPPCo with four nitro groups exhibited the most efficient catalytic activity with a turnover frequency of 4.9 × 104 s-1 and a catalytic onset potential 820 mV more positive than that of the parent TPPCo. Furthermore, the turnover frequencies of the catalysts increased with a higher number of nitro groups. These results demonstrate the promising design strategy of incorporating multielectron redox-active ligands into CO2 reduction catalysts to enhance catalytic performance.
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Affiliation(s)
- Wen-Wen Yong
- Center
of Basic Molecular Science (CBMS), Department of Chemistry, Tsinghua University, Beijing 100084, China
- Institute
of Materials, China Academy of Engineering Physics (CAEP), Jiangyou 621908, China
| | - Hong-Tao Zhang
- Center
of Basic Molecular Science (CBMS), Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Yu-Hua Guo
- Center
of Basic Molecular Science (CBMS), Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Fei Xie
- Center
of Basic Molecular Science (CBMS), Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Ming-Tian Zhang
- Center
of Basic Molecular Science (CBMS), Department of Chemistry, Tsinghua University, Beijing 100084, China
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6
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Qing Y, Wu Q, He S, Zhang P, Xiong Y, Zhang Y, Huang F, Li F, Chen L. Effects of proton tunneling distance on CO 2 reduction by Mn terpyridine species. Dalton Trans 2023; 52:14309-14313. [PMID: 37779480 DOI: 10.1039/d3dt02081a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/03/2023]
Abstract
Herein, we report two manganese terpyridine dicarbonyl complexes, covalently attached to a proximal (1) or distal (2) amide moiety at the ortho position of the pendent phenyl ring as a proton relay. The isomer 1 achieves a turnover frequency (TOF) of 325 s-1 with a minor overpotential of ca. 200 mV. The performance ranks it among the most efficient molecular catalysts for CO2-to-CO conversion, and it is ca.2 orders faster than isomer 2.
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Affiliation(s)
- Yuhang Qing
- State Key Laboratory of Environment-Friendly Energy Materials, School of Materials and Chemistry, Southwest University of Science and Technology, Mianyang 621010, P. R. China.
| | - Qianqian Wu
- State Key Laboratory of Environment-Friendly Energy Materials, School of Materials and Chemistry, Southwest University of Science and Technology, Mianyang 621010, P. R. China.
| | - Shuanglin He
- State Key Laboratory of Environment-Friendly Energy Materials, School of Materials and Chemistry, Southwest University of Science and Technology, Mianyang 621010, P. R. China.
| | - Ping Zhang
- State Key Laboratory of Environment-Friendly Energy Materials, School of Materials and Chemistry, Southwest University of Science and Technology, Mianyang 621010, P. R. China.
| | - Ying Xiong
- State Key Laboratory of Environment-Friendly Energy Materials, School of Materials and Chemistry, Southwest University of Science and Technology, Mianyang 621010, P. R. China.
| | - Yaping Zhang
- State Key Laboratory of Environment-Friendly Energy Materials, School of Materials and Chemistry, Southwest University of Science and Technology, Mianyang 621010, P. R. China.
| | - Fang Huang
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan 250014, P. R. China
| | - Fei Li
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, P. R. China
| | - Lin Chen
- State Key Laboratory of Environment-Friendly Energy Materials, School of Materials and Chemistry, Southwest University of Science and Technology, Mianyang 621010, P. R. China.
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7
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Gao Z, Hou M, Shi Y, Li L, Sun Q, Yang S, Jiang Z, Yang W, Zhang Z, Hu W. A conductive catecholate-based framework coordinated with unsaturated bismuth boosts CO 2 electroreduction to formate. Chem Sci 2023; 14:6860-6866. [PMID: 37389251 PMCID: PMC10306104 DOI: 10.1039/d3sc01876h] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Accepted: 05/22/2023] [Indexed: 07/01/2023] Open
Abstract
Bismuth-based metal-organic frameworks (Bi-MOFs) have received attention in electrochemical CO2-to-formate conversion. However, the low conductivity and saturated coordination of Bi-MOFs usually lead to poor performance, which severely limits their widespread application. Herein, a conductive catecholate-based framework with Bi-enriched sites (HHTP, 2,3,6,7,10,11-hexahydroxytriphenylene) is constructed and the zigzagging corrugated topology of Bi-HHTP is first unraveled via single-crystal X-ray diffraction. Bi-HHTP possesses excellent electrical conductivity (1.65 S m-1) and unsaturated coordination Bi sites are confirmed by electron paramagnetic resonance spectroscopy. Bi-HHTP exhibited an outstanding performance for selective formate production of 95% with a maximum turnover frequency of 576 h-1 in a flow cell, which surpassed most of the previously reported Bi-MOFs. Significantly, the structure of Bi-HHTP could be well maintained after catalysis. In situ attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR) confirms that the key intermediate is *COOH species. Density functional theory (DFT) calculations reveal that the rate-determining step is *COOH species generation, which is consistent with the in situ ATR-FTIR results. DFT calculations confirmed that the unsaturated coordination Bi sites acted as active sites for electrochemical CO2-to-formate conversion. This work provides new insights into the rational design of conductive, stable, and active Bi-MOFs to improve their performance towards electrochemical CO2 reduction.
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Affiliation(s)
- Zengqiang Gao
- Department of Chemistry, School of Science, Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Tianjin University Tianjin 300072 China
| | - Man Hou
- Department of Chemistry, School of Science, Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Tianjin University Tianjin 300072 China
| | - Yongxia Shi
- Department of Chemistry, School of Science, Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Tianjin University Tianjin 300072 China
| | - Li Li
- Department of Chemistry, School of Science, Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Tianjin University Tianjin 300072 China
| | - Qisheng Sun
- Department of Chemistry, School of Science, Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Tianjin University Tianjin 300072 China
| | - Shuyuan Yang
- Department of Chemistry, School of Science, Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Tianjin University Tianjin 300072 China
| | - Zhiqiang Jiang
- Vanadium and Titanium Resource Comprehensive Utilization Key Laboratory of Sichuan Province, Panzhihua University Panzhihua Sichuan 617000 P. R. China
| | - Wenjuan Yang
- Julong College, Shenzhen Technology University Shenzhen 518118 China
| | - Zhicheng Zhang
- Department of Chemistry, School of Science, Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Tianjin University Tianjin 300072 China
| | - Wenping Hu
- Department of Chemistry, School of Science, Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Tianjin University Tianjin 300072 China
- Haihe Laboratory of Sustainable Chemical Transformations Tianjin 300192 China
- Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University Binhai New City Fuzhou 350207 China
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8
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Molecular Engineering of Metal Complexes for Electrocatalytic Carbon Dioxide Reduction: From Adjustment of Intrinsic Activity to Molecular Immobilization. Angew Chem Int Ed Engl 2022; 61:e202205301. [DOI: 10.1002/anie.202205301] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Indexed: 01/03/2023]
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9
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Scherpf T, Carr CR, Donnelly LJ, Dubrawski ZS, Gelfand BS, Piers WE. A Mesoionic Carbene-Pyridine Bidentate Ligand That Improves Stability in Electrocatalytic CO 2 Reduction by a Molecular Manganese Catalyst. Inorg Chem 2022; 61:13644-13656. [PMID: 35981323 DOI: 10.1021/acs.inorgchem.2c02689] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Tricarbonyl Group 7 complexes have a longstanding history as efficacious CO2 electroreduction catalysts. Typically, these complexes feature an auxiliary 2,2'-bipyridine ligand that assists in redox steps by delocalizing the electron density into the ligand orbitals. While this feature lends to an accessible redox potential for CO2 electroreduction, it also presents challenges for electrocatalysis with Mn because the electron density is removed from metal-ligand bonding orbitals. The results presented here thus introduce a mesoionic carbene (MIC) as a potent ligand platform to promote Mn-based electrocatalysis. The strong σ donation of the N,C-bidentate MIC is shown to help centralize the electron density on the Mn center while also maintaining relevant redox potentials for CO2 electroreduction. Mechanistic investigation supports catalytic turnover at two operative potentials separated by 400 mV. In the low operating potential regime at -1.54 V, Mn(0) species catalyze CO2 to CO and CO32-, which has a maximum rate of 7 ± 5 s-1 and is stable for up to 30.7 h. At higher operating potential at -1.94 V, "Mn(-1)" catalyzes CO2 to CO and H2O with faster turnovers of 200 ± 100 s-1, with the trade-off being less stability at 6.7 h. The relative stabilities of Mn complexes bearing MIC and 4,4'-di-tert-butyl-2,2'-bipyridine were compared by evaluation under the same electrolysis conditions and therefore elucidated that the MIC promotes longevity for CO evolution throughout a 5 h period.
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Affiliation(s)
- Thorsten Scherpf
- Department of Chemistry, University of Calgary, 2500 University Drive N.W., Calgary, Alberta T2N 1N4, Canada
| | - Cody R Carr
- Department of Chemistry, University of Calgary, 2500 University Drive N.W., Calgary, Alberta T2N 1N4, Canada
| | - Laurie J Donnelly
- Department of Chemistry, University of Calgary, 2500 University Drive N.W., Calgary, Alberta T2N 1N4, Canada
| | - Zachary S Dubrawski
- Department of Chemistry, University of Calgary, 2500 University Drive N.W., Calgary, Alberta T2N 1N4, Canada
| | - Benjamin S Gelfand
- Department of Chemistry, University of Calgary, 2500 University Drive N.W., Calgary, Alberta T2N 1N4, Canada
| | - Warren E Piers
- Department of Chemistry, University of Calgary, 2500 University Drive N.W., Calgary, Alberta T2N 1N4, Canada
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10
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Shipp J, Parker S, Spall S, Peralta-Arriaga SL, Robertson CC, Chekulaev D, Portius P, Turega S, Buckley A, Rothman R, Weinstein JA. Photocatalytic Reduction of CO 2 to CO in Aqueous Solution under Red-Light Irradiation by a Zn-Porphyrin-Sensitized Mn(I) Catalyst. Inorg Chem 2022; 61:13281-13292. [PMID: 35960651 PMCID: PMC9446891 DOI: 10.1021/acs.inorgchem.2c00091] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
![]()
This work demonstrates photocatalytic CO2 reduction
by a noble-metal-free photosensitizer-catalyst system in aqueous solution
under red-light irradiation. A water-soluble Mn(I) tricarbonyl diimine
complex, [MnBr(4,4′-{Et2O3PCH2}2-2,2′-bipyridyl)(CO)3] (1), has been fully characterized, including single-crystal X-ray crystallography,
and shown to reduce CO2 to CO following photosensitization
by tetra(N-methyl-4-pyridyl)porphyrin Zn(II) tetrachloride
[Zn(TMPyP)]Cl4 (2) under 625 nm irradiation.
This is the first example of 2 employed as a photosensitizer
for CO2 reduction. The incorporation of −P(O)(OEt)2 groups, decoupled from the core of the catalyst by a −CH2– spacer, afforded water solubility without compromising
the electronic properties of the catalyst. The photostability of the
active Mn(I) catalyst over prolonged periods of irradiation with red
light was confirmed by 1H and 13C{1H} NMR spectroscopy. This first report on Mn(I) species as a homogeneous
photocatalyst, working in water and under red light, illustrates further
future prospects of intrinsically photounstable Mn(I) complexes as
solar-driven catalysts in an aqueous environment. A Mn(I) bipyridyl tricarbonyl complex,
where the diimine
ligand is functionalized with water-solubilizing phosphonate ester
groups, has been prepared and is shown to catalytically convert CO2 to CO in aqueous solution following photosensitization from
a water-soluble Zn(II) porphyrin under red-light irradiation.
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Affiliation(s)
- James Shipp
- Department of Chemistry, University of Sheffield, Sheffield S3 7HF, U.K
| | - Simon Parker
- Department of Chemistry, University of Sheffield, Sheffield S3 7HF, U.K
| | - Steven Spall
- Department of Chemistry, University of Sheffield, Sheffield S3 7HF, U.K
| | | | - Craig C Robertson
- Department of Chemistry, University of Sheffield, Sheffield S3 7HF, U.K
| | - Dimitri Chekulaev
- Department of Chemistry, University of Sheffield, Sheffield S3 7HF, U.K
| | - Peter Portius
- Department of Chemistry, University of Sheffield, Sheffield S3 7HF, U.K
| | - Simon Turega
- Department of Chemistry, Sheffield Hallam University, Sheffield S1 1WB, U.K
| | - Alastair Buckley
- Department of Physics and Astronomy, University of Sheffield, Sheffield S3 7RH, U.K
| | - Rachael Rothman
- Department of Chemical and Biological Engineering, University of Sheffield, Sheffield S1 3JD, U.K
| | - Julia A Weinstein
- Department of Chemistry, University of Sheffield, Sheffield S3 7HF, U.K
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11
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Yang ZW, Chen JM, Qiu LQ, Xie WJ, He LN. Molecular Engineering of Metal Complexes for Electrocatalytic Carbon Dioxide Reduction: From Adjustment of Intrinsic Activity to Molecular Immobilization. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202205301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Zhi-Wen Yang
- Nankai University College of Chemistry Inst. Elemento-Org. Chem. CHINA
| | - Jin-Mei Chen
- Nankai University College of Chemistry Inst. Elemento-Org. Chem. CHINA
| | - Li-Qi Qiu
- Nankai University College of Chemistry Inst. Elemento-Org. Chem. CHINA
| | - Wen-Jun Xie
- Nankai University College of Chemistry Inst. Elemento-Org. Chem. CHINA
| | - Liang-Nian He
- Nankai University College of Chemistry Institute of Elemento-Organic Chemistry Weijin Rd. 94 300071 Tianjin CHINA
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12
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Siritanaratkul B, Eagle C, Cowan AJ. Manganese Carbonyl Complexes as Selective Electrocatalysts for CO 2 Reduction in Water and Organic Solvents. Acc Chem Res 2022; 55:955-965. [PMID: 35285618 PMCID: PMC9007415 DOI: 10.1021/acs.accounts.1c00692] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
![]()
The electrochemical
reduction
of CO2 provides a way
to sustainably generate carbon-based fuels and feedstocks. Molecular
CO2 reduction electrocatalysts provide tunable reaction
centers offering an approach to control the selectivity of catalysis.
Manganese carbonyl complexes, based on [Mn(bpy)(CO)3Br]
and its derivatives (bpy = 2,2′-bipyridine), are particularly
interesting due to their ease of synthesis and the use of a first-row
earth-abundant transition metal. [Mn(bpy)(CO)3Br] was first
shown to be an active and selective catalyst for reducing CO2 to CO in organic solvents in 2011. Since then, manganese carbonyl
catalysts have been widely studied with numerous reports of their
use as electrocatalysts and photocatalysts and studies of their mechanism. This class of Mn catalysts only shows CO2 reduction
activity with the addition of weak Brønsted acids. Perhaps surprisingly,
early reports showed increased turnover frequencies as the acid strength
is increased without a loss in selectivity toward CO evolution. It
may have been expected that the competing hydrogen evolution
reaction could have led to lower selectivity. Inspired by these works
we began to explore if the catalyst would work in protic solvents,
namely, water, and to explore the pH range over which it can operate.
Here we describe the early studies from our laboratory that first
demonstrated the use of manganese carbonyl complexes in water and
then go on to discuss wider developments on the use of these catalysts
in water, highlighting their potential as catalysts for use in aqueous
CO2 electrolyzers. Key to the excellent selectivity
of these catalysts in the presence
of Brønsted acids is a proton-assisted CO2 binding
mechanism, where for the acids widely studied, lower pKa values actually favor CO2 binding over Mn–H
formation, a precursor to H2 evolution. Here we discuss
the wider literature before focusing on our own contributions in validating
this previously proposed mechanism through the use of vibrational
sum frequency generation (VSFG) spectroelectrochemistry. This allowed
us to study [Mn(bpy)(CO)3Br] while it is at, or near, the
electrode surface, which provided a way to identify new catalytic
intermediates and also confirm that proton-assisted CO2 binding operates in both the “dimer” and primary (via
[Mn(bpy)(CO)3]−) pathways. Understanding
the mechanism of how these highly selective catalysts operate is important
as we propose that the Mn complexes will be valuable models to guide
the development of new proton/acid tolerant CO2 reduction
catalysts.
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Affiliation(s)
- Bhavin Siritanaratkul
- Stephenson Institute for Renewable Energy and the Department of Chemistry, University of Liverpool, Liverpool L69 7ZF, U.K
| | - Catherine Eagle
- Stephenson Institute for Renewable Energy and the Department of Chemistry, University of Liverpool, Liverpool L69 7ZF, U.K
| | - Alexander J. Cowan
- Stephenson Institute for Renewable Energy and the Department of Chemistry, University of Liverpool, Liverpool L69 7ZF, U.K
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Homogeneous electrocatalytic CO2 reduction by hexacarbonyl diiron dithiolate complex bearing hydroquinone. J Organomet Chem 2021. [DOI: 10.1016/j.jorganchem.2021.122094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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