1
|
Rotundo L, Ahmad S, Cappuccino C, Pearce AJ, Nedzbala H, Bottum SR, Mayer JM, Cahoon JF, Grills DC, Ertem MZ, Manbeck GF. Fast Catalysis at Low Overpotential: Designing Efficient Dicationic Re(bpy 2+)(CO) 3I Electrocatalysts for CO 2 Reduction. J Am Chem Soc 2024; 146:24742-24747. [PMID: 39190866 DOI: 10.1021/jacs.4c08084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/29/2024]
Abstract
We report a series of isomeric, dicationic Re(bpy2+)(CO)3I complexes with bpy (2,2'-bipyridine) modified by two phenyl-CH2-(NMe3)+ pendants with cations located at variable distances from the active site for electrocatalytic CO2 reduction in CH3CN/2.8 M H2O. The position of the cationic groups dramatically increases the rate of catalysis by ∼800-fold, from 1.2 to 950 s-1, with only a minor increase in overpotential. Acceleration is due to stabilization of the initial CO2 adduct and lowering of ΔG‡ for C-OH bond cleavage by Coulombic stabilization of anionic charges. Performance may be enhanced by accumulation in the electrochemical double layer. Transition state stabilization in the optimized isomer unlocks the low overpotential "protonation-first" pathway, highlighting the sizable effects of subtle structural optimization.
Collapse
Affiliation(s)
- Laura Rotundo
- Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973-5000, United States
| | - Shahbaz Ahmad
- Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973-5000, United States
| | - Chiara Cappuccino
- Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973-5000, United States
| | - Adam J Pearce
- The Department of Chemistry, Yale University, New Haven, Connecticut 06520, United States
| | - Hannah Nedzbala
- The Department of Chemistry, Yale University, New Haven, Connecticut 06520, United States
| | - Samuel R Bottum
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - James M Mayer
- The Department of Chemistry, Yale University, New Haven, Connecticut 06520, United States
| | - James F Cahoon
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - David C Grills
- Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973-5000, United States
| | - Mehmed Z Ertem
- Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973-5000, United States
| | - Gerald F Manbeck
- Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973-5000, United States
| |
Collapse
|
2
|
Mandal SK, Choudhury J. Three-Way Control on Product Selectivity in Electrocatalytic CO 2 Reduction Reaction Using a Single Molecular Co-NHC Catalyst. Inorg Chem 2024; 63:16327-16336. [PMID: 39175416 DOI: 10.1021/acs.inorgchem.4c02276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/24/2024]
Abstract
For a long time, molecular electrocatalysts have been developed to reduce CO2 efficiently to value-added products such as CO and HCO2H, along with H2; however, selectivity remained as a major issue. Recent work toward addressing this issue showed that several different catalysts could be used to achieve product selectivity. It is desirable that instead of using different catalysts for specific products, a single catalyst should be able to produce the target products by subtle tuning of the reaction conditions. Toward this objective, herein we presented the organometallic Co electrocatalyst Co-NHCU and successfully utilized it in the electrochemical CO2 reduction reaction (CO2RR) to produce CO, H2, and HCO2H with notable selectivity. The reduction of CO2 selectively produced CO with 81 ± 2% Faradaic efficiency (FE) in the presence of 5% H2O as a proton source. The selectivity was changed toward H2 with 80 ± 3% FE when 1.5 M triethylamine was added as an additive in the presence of 10% H2O as a proton source. In the presence of 1.0 M morpholine as an external additive, the CO2-saturated solution containing 10% trifluoroethanol as a proton source generates 55 ± 5% HCO2H as the predominant product, with H2 as a competitive side product. It was found that the combined effect of the proton source and the additive in association with the nature of the Co-NHCU catalyst changed the selectivity of the products in this reaction.
Collapse
Affiliation(s)
- Sanajit Kumar Mandal
- Organometallics & Smart Materials Laboratory, Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal 462 066, India
| | - Joyanta Choudhury
- Organometallics & Smart Materials Laboratory, Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal 462 066, India
| |
Collapse
|
3
|
Saha S, Doughty T, Banerjee D, Patel SK, Mallick D, Iyer ESS, Roy S, Mitra R. Electrocatalytic reduction of CO 2 to CO by a series of organometallic Re(I)-tpy complexes. Dalton Trans 2023; 52:15394-15411. [PMID: 37203345 DOI: 10.1039/d3dt00441d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
A series of organometallic Re(I)(L)(CO)3Br complexes with 4'-substituted terpyridine ligands (L) has been synthesised as electrocatalysts for CO2 reduction. The complexes' spectroscopic characterisation and computationally optimised geometry demonstrate a facial geometry around Re(I) with three cis COs and the terpyridine ligand coordinating in a bidentate mode. The effect of substitution on the 4'-position of terpyridine (Re1-5) on CO2 electroreduction was investigated and compared with a known Lehn-type catalyst, Re(I)(bpy)(CO)3Br (Re7). All complexes catalyse CO evolution in homogeneous organic media at moderate overpotentials (0.75-0.95 V) with faradaic yields of 62-98%. The electrochemical catalytic activity was further evaluated in the presence of three Brønsted acids to demonstrate the influence of the pKa of the proton sources. The TDDFT and ultrafast transient absorption spectroscopy (TAS) studies showed combined charge transfer bands of ILCT and MLCT. Amongst the series, the Re-complex containing a ferrocenyl-substituted terpyridine ligand (Re5) shows an additional intra-ligand charge transfer band and was probed using UV-Vis spectroelectrochemistry.
Collapse
Affiliation(s)
- Shriya Saha
- School of Chemical and Materials Sciences, Indian Institute of Technology Goa, Farmagudi, Goa 403401, India.
| | - Thomas Doughty
- School of Chemistry, University of Lincoln, Green Lane, Lincoln, Lincolnshire, LN6 7DL, UK.
| | - Dibyendu Banerjee
- Department of Chemistry, Presidency University, Kolkata 700073, India.
| | - Sunil K Patel
- School of Chemical and Materials Sciences, Indian Institute of Technology Goa, Farmagudi, Goa 403401, India.
| | - Dibyendu Mallick
- Department of Chemistry, Presidency University, Kolkata 700073, India.
| | - E Siva Subramaniam Iyer
- School of Chemical and Materials Sciences, Indian Institute of Technology Goa, Farmagudi, Goa 403401, India.
| | - Souvik Roy
- School of Chemistry, University of Lincoln, Green Lane, Lincoln, Lincolnshire, LN6 7DL, UK.
| | - Raja Mitra
- School of Chemical and Materials Sciences, Indian Institute of Technology Goa, Farmagudi, Goa 403401, India.
| |
Collapse
|
4
|
Singh KK, Gerke CS, Saund SS, Zito AM, Siegler MA, Thoi VS. CO 2 Activation with Manganese Tricarbonyl Complexes through an H-Atom Responsive Benzimidazole Ligand. Chemistry 2023; 29:e202300796. [PMID: 37519094 DOI: 10.1002/chem.202300796] [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: 03/11/2023] [Revised: 07/20/2023] [Accepted: 07/27/2023] [Indexed: 08/01/2023]
Abstract
Herein, we report the synthesis and characterization of two manganese tricarbonyl complexes, MnI (HL)(CO)3 Br (1 a-Br) and MnI (MeL)(CO)3 Br (1 b-Br) (where HL=2-(2'-pyridyl)benzimidazole; MeL=1-methyl-2-(2'-pyridy)benzimidazole) and assayed their electrocatalytic properties for CO2 reduction. A redox-active pyridine benzimidazole ancillary ligand in complex 1 a-Br displayed unique hydrogen atom transfer ability to facilitate electrocatalytic CO2 conversion at a markedly lower reduction potential than that observed for 1 b-Br. Notably, a one-electron reduction of 1 a-Br yields a structurally characterized H-bonded binuclear Mn(I) adduct (2 a') rather than the typically observed Mn(0)-Mn(0) dimer, suggesting a novel method for CO2 activation. Combining advanced electrochemical, spectroscopic, and single crystal X-ray diffraction techniques, we demonstrate the use of an H-atom responsive ligand may reveal an alternative, low-energy pathway for CO2 activation by an earth-abundant metal complex catalyst.
Collapse
Affiliation(s)
- Kundan K Singh
- Department of Chemistry, Johns Hopkins University, Baltimore, MD, 21218, United States
| | - Carter S Gerke
- Department of Chemistry, Johns Hopkins University, Baltimore, MD, 21218, United States
| | - Simran S Saund
- Department of Chemistry, Johns Hopkins University, Baltimore, MD, 21218, United States
| | - Alessandra M Zito
- Department of Chemistry, Johns Hopkins University, Baltimore, MD, 21218, United States
| | - Maxime A Siegler
- Department of Chemistry, Johns Hopkins University, Baltimore, MD, 21218, United States
| | - V Sara Thoi
- Department of Chemistry, Johns Hopkins University, Baltimore, MD, 21218, United States
- Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD, 21218, United States
| |
Collapse
|
5
|
Liu H, Zou H, Wang D, Wang C, Li F, Dai H, Song T, Wang M, Ji Y, Duan L. Second Sphere Effects Promote Formic Acid Dehydrogenation by a Single-Atom Gold Catalyst Supported on Amino-Substituted Graphdiyne. Angew Chem Int Ed Engl 2023; 62:e202216739. [PMID: 36651658 DOI: 10.1002/anie.202216739] [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: 11/14/2022] [Revised: 01/12/2023] [Accepted: 01/16/2023] [Indexed: 01/19/2023]
Abstract
Regulating the second sphere of homogeneous molecular catalysts is a common and effective method to boost their catalytic activities, while the second sphere effects have rarely been investigated for heterogeneous single-atom catalysts primarily due to the synthetic challenge for installing functional groups in their second spheres. Benefiting from the well-defined and readily tailorable structure of graphdiyne (GDY), an Au single-atom catalyst on amino-substituted GDY is constructed, where the amino group is located in the second sphere of the Au center. The Au atoms on amino-decorated GDY displayed superior activity for formic acid dehydrogenation compared with those on unfunctionalized GDY. The experimental studies, particularly the proton inventory studies, and theoretical calculations revealed that the amino groups adjacent to an Au atom could serve as proton relays and thus facilitate the protonation of an intermediate Au-H to generate H2 . Our study paves the way to precisely constructing the functional second sphere on single-atom catalysts.
Collapse
Affiliation(s)
- Hong Liu
- Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Haiyuan Zou
- Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Dan Wang
- Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Chuancheng Wang
- Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Fan Li
- Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Hao Dai
- Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Tao Song
- Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Mei Wang
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, 116024, China
| | - Yongfei Ji
- School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, Guangdong, 510006, China
| | - Lele Duan
- Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen, 518055, China
| |
Collapse
|
6
|
Hong W, Luthra M, Jakobsen JB, Madsen MR, Castro AC, Hammershøj HCD, Pedersen SU, Balcells D, Skrydstrup T, Daasbjerg K, Nova A. Exploring the Parameters Controlling Product Selectivity in Electrochemical CO 2 Reduction in Competition with Hydrogen Evolution Employing Manganese Bipyridine Complexes. ACS Catal 2023; 13:3109-3119. [PMID: 36910875 PMCID: PMC9990071 DOI: 10.1021/acscatal.2c05951] [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: 12/02/2022] [Revised: 01/30/2023] [Indexed: 02/18/2023]
Abstract
Selective reduction of CO2 is an efficient solution for producing nonfossil-based chemical feedstocks and simultaneously alleviating the increasing atmospheric concentration of this greenhouse gas. With this aim, molecular electrocatalysts are being extensively studied, although selectivity remains an issue. In this work, a combined experimental-computational study explores how the molecular structure of Mn-based complexes determines the dominant product in the reduction of CO2 to HCOOH, CO, and H2. In contrast to previous Mn(bpy-R)(CO)3Br catalysts containing alkyl amines in the vicinity of the Br ligand, here, we report that bpy-based macrocycles locking these amines at the side opposite to the Br ligand change the product selectivity from HCOOH to H2. Ab initio molecular dynamics simulations of the active species showed that free rotation of the Mn(CO)3 moiety allows for the approach of the protonated amine to the reactive center yielding a Mn-hydride intermediate, which is the key in the formation of H2 and HCOOH. Additional studies with DFT methods showed that the macrocyclic moiety hinders the insertion of CO2 to the metal hydride favoring the formation of H2 over HCOOH. Further, our results suggest that the minor CO product observed experimentally is formed when CO2 adds to Mn on the side opposite to the amine ligand before protonation. These results show how product selectivity can be modulated by ligand design in Mn-based catalysts, providing atomistic details that can be leveraged in the development of a fully selective system.
Collapse
Affiliation(s)
- Wanwan Hong
- Carbon Dioxide Activation Center (CADIAC), Interdisciplinary Nanoscience Center, Department of Chemistry, Aarhus University, Gustav Wieds Vej 14, 8000 Aarhus C, Denmark
| | - Mahika Luthra
- Hylleraas Centre for Quantum Molecular Sciences, Department of Chemistry, University of Oslo, 0315 Oslo, Norway
| | - Joakim B Jakobsen
- Carbon Dioxide Activation Center (CADIAC), Interdisciplinary Nanoscience Center, Department of Chemistry, Aarhus University, Gustav Wieds Vej 14, 8000 Aarhus C, Denmark
| | - Monica R Madsen
- Carbon Dioxide Activation Center (CADIAC), Interdisciplinary Nanoscience Center, Department of Chemistry, Aarhus University, Gustav Wieds Vej 14, 8000 Aarhus C, Denmark
| | - Abril C Castro
- Hylleraas Centre for Quantum Molecular Sciences, Department of Chemistry, University of Oslo, 0315 Oslo, Norway
| | - Hans Christian D Hammershøj
- Carbon Dioxide Activation Center (CADIAC), Interdisciplinary Nanoscience Center, Department of Chemistry, Aarhus University, Gustav Wieds Vej 14, 8000 Aarhus C, Denmark
| | - Steen U Pedersen
- Interdisciplinary Nanoscience Center, Department of Chemistry, Aarhus University, Langelandsgade 140, 8000 Aarhus C, Denmark
| | - David Balcells
- Hylleraas Centre for Quantum Molecular Sciences, Department of Chemistry, University of Oslo, 0315 Oslo, Norway
| | - Troels Skrydstrup
- Carbon Dioxide Activation Center (CADIAC), Novo Nordisk Foundation (NNF) CO2 Research Center, Interdisciplinary Nanoscience Center, Department of Chemistry, Aarhus University, Gustav Wieds Vej 14, 8000 Aarhus C, Denmark
| | - Kim Daasbjerg
- Novo Nordisk Foundation (NNF) CO2 Research Center, Interdisciplinary Nanoscience Center, Department of Chemistry, Aarhus University, Gustav Wieds Vej 10C, 8000 Aarhus C, Denmark
| | - Ainara Nova
- Hylleraas Centre for Quantum Molecular Sciences, Department of Chemistry, University of Oslo, 0315 Oslo, Norway.,Centre for Materials Science and Nanotechnology, Department of Chemistry, University of Oslo, 0315 Oslo, Norway
| |
Collapse
|
7
|
Rhenium(I)-tricarbonyl complexes with methimazole and its selenium analogue: Syntheses, characterization and cell toxicity. J Inorg Biochem 2023; 240:112092. [PMID: 36549168 DOI: 10.1016/j.jinorgbio.2022.112092] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 11/24/2022] [Accepted: 12/02/2022] [Indexed: 12/12/2022]
Abstract
This study explores the effect of a thione/selone ligand on the cell toxicity (in vitro) and light activity of diimine Re(CO)3+ complexes. Six rhenium(I) complexes with general formula fac-[Re(CO)3(N,N')X]+ were prepared, where X = 2-mercapto-1-methylimidazole (methimazole; MMI), and 1-methylimidazole-2-selone (MSeI); N,N' = 2,2'-bipyridine (bpy), 1,10-phenanthroline (phen) and 2,9-dimethyl-1,10-phenanthroline (dmphen). Their triflate salts were characterized using single-crystal X-ray diffraction, 1H, 13C and 2D NMR, UV-vis and vibrational spectroscopy. Their cytotoxic properties were tested, showing significant cytotoxicity (IC50 = 8.0-55 μM) towards the human breast cancer cell line MDA-MB-231. The half-inhibitory concentration (IC50) for fac-[Re(CO)3(dmphen)(MMI)]+, the most toxic complex in this series (8.0 ± 0.2 μM), was comparable to that of the corresponding aqua complex fac-[Re(CO)3(dmphen)(H2O)]+ with IC50 = 6.0 ± 0.1 μM. The fac-[Re(CO)3(bpy)(MMI/MSeI)]+ complexes were somewhat less toxic towards the human embryonic kidney cell line HEK-293 T after 48 h of exposure. The stability of the complexes upon irradiation was monitored using UV-vis spectroscopy, with no CO released when exposed to UV-A light (λ = 365 nm).
Collapse
|
8
|
Song S, Lee W, Lee Y, Cho KB, Lee J, Seo J. Two-Electron-Induced Reorganization of Cobalt Coordination and Metal-Ligand Cooperative Redox Shifting Co(I) Reactivity toward CO 2 Reduction. Inorg Chem 2023; 62:2326-2333. [PMID: 36691700 DOI: 10.1021/acs.inorgchem.2c04071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Electrochemical reorganization of complex structures is directly related to catalytic reactivity; thus, the geometric changes of catalysts induced by electron transfer should be considered to scrutinize the reaction mechanism. Herein, we studied electron-induced reorganization patterns of six-coordinate Co complexes with neutral N-donor ligands. Upon two-electron transfer into a Co center enclosed within a bulky π-acceptor ligand, the catalytic site exhibited different reorganization patterns depending on the ligand characteristics. While a bipyridyl ligand released Co-bound solvent (CH3CN) to open a reaction site, a phenanthroline ligand caused Co-Narm (side "arm" of NNN-ligand) bond dissociation. The first electron transfer occurred in the Co(II/I) reduction step and the second electron entered the bulky π-acceptor, of which redox steps were assigned from cyclic voltammograms, magnetic moment measurements, and DFT calculations. In comparison, the Co complex of [NNNNCH3-Co(CH3CN)3](PF6)2 ([1-(CH3CN)3](PF6)2) showed a high H2 evolution reactivity (HER), whereas a series of Co complexes with bulky π-acceptors such as [NNNNCH3-Co(L)(CH3CN)](PF6)2 (L = phen ([2-CH3CN](PF6)2), bpy ([3-CH3CN](PF6)2), [NNNNCH3-Co(tpy)](PF6)2 ([4](PF6)2), and [NNNCH2-Co(phen)(CH3CN)](PF6)2 ([5-CH3CN](PF6)2)) suppressed the HER but rather enhanced the CO2 reduction reaction. The metal-ligand cooperative redox steps enabled the shift of Co(I) reactivity toward CO2 reduction. Additionally, the amine pendant attached to the NNNNCH3-ligand could stabilize the CO2 reduction intermediate through the hydrogen-bonding interaction with the Co-CO2H adduct.
Collapse
Affiliation(s)
- Seungjin Song
- Department of Chemistry, Gwangju Institute of Science and Technology; Gwangju61005, Republic of Korea.,Research Center for Innovative Energy and Carbon Optimized Synthesis for Chemicals(Inn-ECOSysChem), Gwangju Institute of Science and Technology; Gwangju61005, Republic of Korea
| | - Wonjung Lee
- Department of Chemistry, Gwangju Institute of Science and Technology; Gwangju61005, Republic of Korea.,Research Center for Innovative Energy and Carbon Optimized Synthesis for Chemicals(Inn-ECOSysChem), Gwangju Institute of Science and Technology; Gwangju61005, Republic of Korea
| | - Youngseob Lee
- Department of Chemistry, Jeonbuk National University, Jeonju54896, Republic of Korea
| | - Kyung-Bin Cho
- Department of Chemistry, Jeonbuk National University, Jeonju54896, Republic of Korea
| | - Junseong Lee
- Department of Chemistry, Chonnam National University; Gwangju61186, Republic of Korea
| | - Junhyeok Seo
- Department of Chemistry, Gwangju Institute of Science and Technology; Gwangju61005, Republic of Korea.,Research Center for Innovative Energy and Carbon Optimized Synthesis for Chemicals(Inn-ECOSysChem), Gwangju Institute of Science and Technology; Gwangju61005, Republic of Korea
| |
Collapse
|
9
|
Xia W, Wang F. Molecular catalysts design: Intramolecular supporting site assisting to metal center for efficient CO2 photo- and electroreduction. MOLECULAR CATALYSIS 2023. [DOI: 10.1016/j.mcat.2022.112884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
|
10
|
Photoinduced Processes in Rhenium(I) Terpyridine Complexes Bearing Remote Amine Groups: New Insights from Transient Absorption Spectroscopy. Molecules 2022; 27:molecules27217147. [DOI: 10.3390/molecules27217147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Revised: 10/18/2022] [Accepted: 10/19/2022] [Indexed: 11/07/2022] Open
Abstract
Photophysical properties of two Re(I) complexes [ReCl(CO)3(R-C6H4-terpy-κ2N)] with remote amine groups, N-methyl-piperazinyl (1) and (2-cyanoethyl)methylamine (2), were investigated. The complexes show strong absorption in the visible region corresponding to metal-to-ligand charge transfer (1MLCT) and intraligand-charge-transfer (1ILCT) transitions. The energy levels of 3MLCT and 3ILCT excited-states, and thus photoluminescence properties of 1 and 2, were found to be strongly affected by the solvent polarity. Compared to the parent chromophore [ReCl(CO)3(C6H5-terpy-κ2N)] (3), both designed complexes show significantly prolonged (by 1–2 orders of magnitude) phosphorescence lifetimes in acetonitrile and dimethylformamide, contrary to their lifetimes in less polar chloroform and tetrahydrofuran, which are comparable to those for 3. The femtosecond transient absorption (fsTA) measurements confirmed the interconversion between the 3MLCT and 3ILCT excited-states in polar solvents. In contrast, the emissive state of 1 and 2 in less polar environments is of predominant 3MLCT nature.
Collapse
|
11
|
Zhang YQ, Wang ZH, Li M, Liao RZ. Understanding the chemoselectivity switch in CO2 reduction catalyzed by Co and Fe complexes bearing a pentadentate N5 ligand. J Catal 2022. [DOI: 10.1016/j.jcat.2022.09.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
12
|
Nguyen P, Dao TBN, Tran TT, Tran NAT, Nguyen TA, Phan TDL, Nguyen LP, Dang VQ, Nguyen TM, Dang NN. Electrocatalytic CO 2 Reduction by [Re(CO) 3Cl(3-(pyridin-2-yl)-5-phenyl-1,2,4-triazole)] and [Re(CO) 3Cl(3-(2-pyridyl)-1,2,4-triazole)]. ACS OMEGA 2022; 7:34089-34097. [PMID: 36188295 PMCID: PMC9520745 DOI: 10.1021/acsomega.2c03278] [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: 05/31/2022] [Accepted: 09/05/2022] [Indexed: 06/16/2023]
Abstract
The exploration of novel electrocatalysts for CO2 reduction is necessary to overcome global warming and the depletion of fossil fuels. In the current study, the electrocatalytic CO2 reduction of [Re(CO)3Cl(N-N)], where N-N represents 3-(2-pyridyl)-1,2,4-triazole (Hpy), 3-(pyridin-2-yl)-5-phenyl-l,2,4-triazole (Hph), and 2,2'-bipyridine-4,4' dicarboxylic acidic (bpy-COOH) ligands, was investigated. In CO2-saturated electrolytes, cyclic voltammograms showed an enhancement of the current at the second reduction wave for all complexes. In the presence of triethanolamine (TEOA), the currents of Re(Hpy), Re(Hph), and Re(bpy-COOH) enhanced significantly by approximately 4-, 2-, and 5-fold at peak potentials of -1.60, -150, and -1.69 VAg/Ag+, respectively (in comparison to without TEOA). The reduction potential of Re(Hph) was less negative than those of Re(Hpy) and Re(COOH), which was suggested to cause its least efficiency for CO2 reduction. Chronoamperometry measurements showed the stability of the cathodic current at the second reduction wave for at least 300 s, and Re(COOH) was the most stable in the CO2-catalyzed reduction. The appearance and disappearance of the absorption band in the UV/vis spectra indicated the reaction of the catalyst with molecular CO2 and its conversion to new species, which were proposed to be Re-DMF + and Re-TEOA and were supposed to react with CO2 molecules. The CO2 molecules were claimed to be captured and inserted into the oxygen bond of Re-TEOA, resulting in the enhancement of the CO2 reduction efficiency. The results indicate a new way of using these complexes in electrocatalytic CO2 reduction.
Collapse
Affiliation(s)
- Phuong
N. Nguyen
- Institute
of Applied Materials Science, Vietnam Academy of Science and Technology
(VAST), 29TL Street, Thanh Loc Ward, District 12, Ho Chi Minh City 700000, Vietnam
- Graduate
University of Science and Technology, VAST, 18 Hoang Quoc Viet Street, Cau
Giay, Ha Noi 100000, Vietnam
| | - Thi-Bich-Ngoc Dao
- Future
Materials & Devices Lab., Institute of Fundamental and Applied
Sciences, Duy Tan University, Ho Chi Minh City 700000, Vietnam
- The
Faculty of Environmental and Chemical Engineering, Duy Tan University, Danang 550000, Vietnam
| | - Trang T. Tran
- Institute
of Applied Materials Science, Vietnam Academy of Science and Technology
(VAST), 29TL Street, Thanh Loc Ward, District 12, Ho Chi Minh City 700000, Vietnam
- Department
Materials Science and Technology, University
of Science, Ward 4, District 5, Ho Chi Minh City 700000, Vietnam
| | - Ngoc-Anh T. Tran
- Institute
of Applied Materials Science, Vietnam Academy of Science and Technology
(VAST), 29TL Street, Thanh Loc Ward, District 12, Ho Chi Minh City 700000, Vietnam
- Department
Materials Science and Technology, University
of Science, Ward 4, District 5, Ho Chi Minh City 700000, Vietnam
| | - Tu A. Nguyen
- Institute
of Applied Materials Science, Vietnam Academy of Science and Technology
(VAST), 29TL Street, Thanh Loc Ward, District 12, Ho Chi Minh City 700000, Vietnam
- Department
Materials Science and Technology, University
of Science, Ward 4, District 5, Ho Chi Minh City 700000, Vietnam
| | - Thao-Dang L. Phan
- Institute
of Applied Materials Science, Vietnam Academy of Science and Technology
(VAST), 29TL Street, Thanh Loc Ward, District 12, Ho Chi Minh City 700000, Vietnam
- Department
Materials Science and Technology, University
of Science, Ward 4, District 5, Ho Chi Minh City 700000, Vietnam
| | - Loc P. Nguyen
- Institute
of Applied Materials Science, Vietnam Academy of Science and Technology
(VAST), 29TL Street, Thanh Loc Ward, District 12, Ho Chi Minh City 700000, Vietnam
- Department
Materials Science and Technology, University
of Science, Ward 4, District 5, Ho Chi Minh City 700000, Vietnam
| | - Vinh Q. Dang
- Department
Materials Science and Technology, University
of Science, Ward 4, District 5, Ho Chi Minh City 700000, Vietnam
- Vietnam
National University, Ho Chi Minh (VNU-HCM), Linh Trung Ward, Thu Duc District, Ho Chi Minh City, Vietnam
| | - Tuan M. Nguyen
- Institute
of Applied Materials Science, Vietnam Academy of Science and Technology
(VAST), 29TL Street, Thanh Loc Ward, District 12, Ho Chi Minh City 700000, Vietnam
- Graduate
University of Science and Technology, VAST, 18 Hoang Quoc Viet Street, Cau
Giay, Ha Noi 100000, Vietnam
| | - Nam N. Dang
- Future
Materials & Devices Lab., Institute of Fundamental and Applied
Sciences, Duy Tan University, Ho Chi Minh City 700000, Vietnam
- The
Faculty of Environmental and Chemical Engineering, Duy Tan University, Danang 550000, Vietnam
| |
Collapse
|
13
|
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]
|
14
|
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
| |
Collapse
|
15
|
Electrochemical and Light-driven CO2 reduction by Amine-Functionalized rhenium Catalysts: A comparison between primary and tertiary amine substitutions. Polyhedron 2022. [DOI: 10.1016/j.poly.2022.115976] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
16
|
Hellman AN, Intrator JA, Choate J, Velazquez DA, Marinescu SC. Primary- and secondary-sphere effects of amine substituent position on rhenium bipyridine electrocatalysts for CO2 reduction. Polyhedron 2022. [DOI: 10.1016/j.poly.2022.115933] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
17
|
Akhter SS, Padhi SK. Electro‐catalytic CO2 Reduction to Syngas and HCOOH by Homogeneous Fc‐NAP2. Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202200206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Sk Samim Akhter
- Indian Institute of Technology (Indian School of Mines): Indian Institute of Technology Chemistry and Chemical Biology INDIA
| | - Sumanta Kumar Padhi
- Indian Institute of Technology (Indian School of Mines), Dhanbad Department of Chemistry and Chemical Biology Science BlockDepartment of Chemistry and Chemical Biology 826004 Dhanbad INDIA
| |
Collapse
|
18
|
Fujita E, Grills DC, Manbeck GF, Polyansky DE. Understanding the Role of Inter- and Intramolecular Promoters in Electro- and Photochemical CO 2 Reduction Using Mn, Re, and Ru Catalysts. Acc Chem Res 2022; 55:616-628. [PMID: 35133133 DOI: 10.1021/acs.accounts.1c00616] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Recycling of carbon dioxide to fuels and chemicals is a promising strategy for renewable energy storage. Carbon dioxide conversion can be achieved by (i) artificial photosynthesis using photoinduced electrons; (ii) electrolysis using electricity produced by photovoltaics; and (iii) thermal CO2 hydrogenation using renewable H2. The focus of our group's research is on molecular catalysts, in particular coordination complexes of transition metals (e.g., Mn, Re, and Ru), which offer versatile platforms for mechanistic studies of photo- and electrochemical CO2 reduction. The interactions of catalytic intermediates with Lewis or Brønsted acids, hydrogen-bonding moieties, solvents, cations, etc., that function as promoters or cofactors have become increasingly important for efficient catalysis. These interactions may have dramatic effects on selectivity and rates by stabilizing intermediates or lowering transition state barriers, but they are difficult to elucidate and challenging to predict. We have been carrying out experimental and theoretical studies of CO2 reduction using molecular catalysts toward addressing mechanisms of efficient CO2 reduction systems with emphasis on those containing intramolecular (or pendent) and intermolecular (solution phase) additives. This Account describes the identification of reaction intermediates produced during CO2 reduction in the presence of triethanolamine or ionic liquids, the benefits of hydrogen-bonding interactions among intermediates or cofactors, and the complications of pendent phenolic donors/phenoxide bases under electrochemical conditions.Triethanolamine (TEOA) is a common sacrificial electron donor for photosensitizer excited state reductive quenching and has a long history of use in photocatalytic CO2 reduction. It also functions as a Brønsted base in conjunction with more potent sacrificial electron donors, such as 1,3-dimethyl-2-phenyl-2,3-dihydro-1H-benzo[d]imidazole (BIH). Deprotonation of the BIH•+ cation radical promotes irreversible photoinduced electron transfer by preventing charge recombination. Despite its wide use, most research to date has not considered the broader reactions of TEOA, including its direct interaction with CO2 or its influence on catalytic intermediates. We found that in acetonitrile, TEOA captures CO2 in the form of a zwitterionic adduct without any metal catalyst. In the presence of ruthenium carbonyl catalysts bearing α-diimine ligands, it participates in metal hydride formation, accelerates hydride transfer to CO2 to form the bound formate intermediate, and assists in the dissociation of formate anion from the catalyst ( J. Am. Chem. Soc. 2020, 142, 2413-2428).Hydrogen bonding and acid/base promoters are understood to interact with key catalytic intermediates, such as the metallocarboxylate or metallocarboxylic acid during CO2 reduction. The former is a high energy species, and hydrogen-bonding or Lewis acid-stabilization are beneficial. We have found that imidazolium-based ionic liquid cations can stabilize the doubly reduced form of the [ReCl(bpy)(CO)3] (bpy = 2,2'-bipyridine) electrocatalyst through both hydrogen-bonding and π-π interactions, resulting in CO2 reduction occurring at a more positive potential with a higher catalytic current ( J. Phys. Chem. Lett. 2014, 5, 2033-2038). Hydrogen bonding interactions between Lewis basic methoxy groups in the second coordination sphere of a Mn-based catalyst and the OH group of the Mn-COOH intermediate in the presence of a Brønsted acid were also found to promote C-(OH) bond cleavage, enabling access to a low-energy protonation-first pathway for CO2 reduction ( J. Am. Chem. Soc. 2017, 139, 2604-2618).The kinetics of forming the metallocarboxylic acid can be enhanced by internal acids, and its proton-induced C-OH bond cleavage to the metallocarbonyl and H2O is often the rate-limiting step. Therefore, proton movement organized by pendent hydrogen-bonding networks may also accelerate this step. In contrast, during electrolysis, OH groups in the second coordination sphere are deprotonated to the oxyanions, which deter catalytic CO2 reduction by directly binding CO2 to form the carbonate or by making an M-O bond in competition with CO2 binding ( Inorg. Chem. 2016, 55, 4582-4594). Our results emphasize that detailed mechanistic research is critical in discovering the design principles for improved catalysts.
Collapse
Affiliation(s)
- Etsuko Fujita
- Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973-5000, United States
| | - David C. Grills
- Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973-5000, United States
| | - Gerald F. Manbeck
- Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973-5000, United States
| | - Dmitry E. Polyansky
- Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973-5000, United States
| |
Collapse
|
19
|
Siewert I. Electrochemical CO 2 Reduction Catalyzed by Binuclear LRe 2(CO) 6Cl 2 and LMn 2(CO) 6Br 2 Complexes with an Internal Proton Source. Acc Chem Res 2022; 55:473-483. [PMID: 35077152 DOI: 10.1021/acs.accounts.1c00609] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The synthesis of certain commodity chemicals, e.g., methanol and acetic acid, relies on CO, which is currently mainly produced by the combustion of carbon or natural gas. Photo- or electrochemical conversion of atmospheric CO2 to CO represents an attractive alternative strategy as this approach is carbon-neutral. Such photo- or electrochemically formed CO can also be used in the Fischer-Tropsch process forming liquid hydrocarbons for energy storage applications. The multiple electroreduction of CO2 is preferably coupled with proton transfer steps as this requires less energy than the single outer-sphere 1e- reduction of CO2.In 1984 and 2011, it was shown that [(Lbpy)Re(CO)3Cl] (1) and [(Lbpy)Mn(CO)3Br] (2), respectively, mediate the electrochemical 2e-/2H+ reduction of CO2 forming CO and water (Lbpy = 2,2'-bipyridine). Since proton management is crucial for catalysis, recently the impact of internal proton sources close to the axial position in such complexes has been investigated. However, binuclear complexes have been used rarely as mediators although it has been shown very early for 1 that electron management is also important: the 2e-/2H+ reduction pathway with 1 exhibits a higher reaction rate than going via the singly reduced species, though the pathway requires a higher overpotential. In this Account, we focus on recent developments of binuclear LMn2(CO)6 and LRe2(CO)6 mediators with an internal phenol group in the electroreduction of CO2. In contrast to mononuclear derivatives, for which the impact of the internal proton source on catalysis is very diverse, we always observed a higher reaction rate and for the Mn complexes also a lower overpotential with the binuclear complexes compared to the mononuclear variants. Spectroscopic, electrochemical, and computational studies on the mono- and binuclear complexes shed light on their reactivity under reductive conditions, elucidated the structure of reduced species, unraveled the kinetics for catalytically productive and unproductive (side) reactions, and allowed us to derive some hypothesis on the CO2 reduction mechanism. Finally, I emphasize that the electrohydrogenation of the polar double bonds by the binuclear complex LMn2(CO)6 with a central phenol unit is not restricted to CO2 but is also applicable to organic compounds with C═O bonds.
Collapse
Affiliation(s)
- Inke Siewert
- Universität Göttingen, Institut für Anorganische Chemie, Tammannstr. 4, 37077 Göttingen, Germany
| |
Collapse
|
20
|
Li X, Panetier JA. Mechanistic Study of Tungsten Bipyridyl Tetracarbonyl Electrocatalysts for CO 2 Fixation: Exploring the Roles of Explicit Proton Sources and Substituent Effects. Top Catal 2022; 65:325-340. [PMID: 37645456 PMCID: PMC10465121 DOI: 10.1007/s11244-021-01529-7] [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] [Accepted: 11/02/2021] [Indexed: 10/19/2022]
Abstract
Tungsten bipyridyl tetracarbonyl complexes were shown to reduce CO2 to CO in acetonitrile [Chem. Sci., 2014, 5, 1894-1900]. Here, we employ density functional theory (DFT) calculations to investigate the electronic structure and reactivity of a series of tungsten electrocatalysts, [W(bpy-R)(CO)4] (where R = H, CH3, tBu, OCH3, CF3, and CN), for the CO2 reduction reaction (CO2RR). Our proposed mechanism suggests that initial reduction of the starting material by two electrons is required to access the active catalyst upon CO dissociation, which is slightly endergonic, consistent with the slow product release observed experimentally. The doubly reduced species, which has a closed-shell singlet ground state, can bind CO2 via an η2-CO2 binding mode to yield the metallocarboxylate intermediate. Based on the energy span model, CO2 addition is the TOF-determining transition state (TDTS) in the presence of water as the proton source. Different substituents at the 4,4'-positions of the bipyridine ligand in [W(bpy-R)(CO)4] (R = H, CH3, tBu, OCH3, CF3, and CN) were considered to comprehend the substituent effects for CO2RR. DFT results show that electron-withdrawing substituents, such as CN and CF3, do not yield efficient CO2 reduction catalysts due to the necessity of forming high energy intermediates for the protonation steps, resulting in low TOFs and high overpotentials. Among electron-donating groups, the parent compound and tert-butyl substituted complex are the most active catalysts for CO2RR due to higher TOFs at low overpotentials. Overall, based on the energy span model and theoretical Tafel plots, our computational approach provides quantitative information for designing CO2 reduction electrocatalysts.
Collapse
Affiliation(s)
- Xiaohui Li
- Department of Chemistry, State University of New York at Binghamton, Binghamton, NY 13902, USA
| | - Julien A. Panetier
- Department of Chemistry, State University of New York at Binghamton, Binghamton, NY 13902, USA
| |
Collapse
|
21
|
Dubrawski ZS, Chang CY, Carr CR, Gelfand BS, Piers WE. Electrocatalyst decomposition pathways: torsional strain in a second sphere proton relay shuts off CO 2RR in a Re(2,2′-bipyridyl)(CO) 3X type electrocatalyst. Dalton Trans 2022; 51:17381-17390. [DOI: 10.1039/d2dt02876j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Group 7 tris(carbonyl) bipyridine complexes have been well explored as important CO2 reduction reaction (CO2RR) electrocatalysts and now represent an excellent platform for catalyst design.
Collapse
Affiliation(s)
- Zachary S. Dubrawski
- University of Calgary, Department of Chemistry, 2500 University Drive N.W., Calgary, Alberta, T2N 1N4, Canada
| | - Chia Yun Chang
- University of Calgary, Department of Chemistry, 2500 University Drive N.W., Calgary, Alberta, T2N 1N4, Canada
| | - Cody R. Carr
- University of Calgary, Department of Chemistry, 2500 University Drive N.W., Calgary, Alberta, T2N 1N4, Canada
| | - Benjamin S. Gelfand
- University of Calgary, Department of Chemistry, 2500 University Drive N.W., Calgary, Alberta, T2N 1N4, Canada
| | - Warren E. Piers
- University of Calgary, Department of Chemistry, 2500 University Drive N.W., Calgary, Alberta, T2N 1N4, Canada
| |
Collapse
|
22
|
Koenig JDB, Piers WE, Welch GC. Promoting photocatalytic CO2 reduction through facile electronic modification of N-annulated perylene diimide rhenium bipyridine dyads. Chem Sci 2022; 13:1049-1059. [PMID: 35211271 PMCID: PMC8790914 DOI: 10.1039/d1sc05465a] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Accepted: 12/28/2021] [Indexed: 11/24/2022] Open
Abstract
The development of CO2 conversion catalysts has become paramount in the effort to close the carbon loop. Herein, we report the synthesis, characterization, and photocatalytic CO2 reduction performance for a series of N-annulated perylene diimide (NPDI) tethered Re(bpy) supramolecular dyads [Re(bpy-C2-NPDI-R)], where R = –H, –Br, –CN, –NO2, –OPh, –NH2, or pyrrolidine (–NR2). The optoelectronic properties of these Re(bpy-C2-NPDI-R) dyads were heavily influenced by the nature of the R-group, resulting in significant differences in photocatalytic CO2 reduction performance. Although some R-groups (i.e. –Br and –OPh) did not influence the performance of CO2 photocatalysis (relative to –H; TONco ∼60), the use of an electron-withdrawing –CN was found to completely deactivate the catalyst (TONco < 1) while the use of an electron-donating –NH2 improved CO2 photocatalysis four-fold (TONco = 234). Despite being the strongest EWG, the –NO2 derivative exhibited good photocatalytic CO2 reduction abilities (TONco = 137). Using a combination of CV and UV-vis-nIR SEC, it was elucidated that the –NO2 derivative undergoes an in situ transformation to –NH2 under reducing conditions, thereby generating a more active catalyst that would account for the unexpected activity. A photocatalytic CO2 mechanism was proposed for these Re(bpy-C2-NPDI-R) dyads (based on molecular orbital descriptions), where it is rationalized that the photoexcitation pathway, as well as the electronic driving-force for NPDI2− to Re(bpy) electron-transfer both significantly influence photocatalytic CO2 reduction. These results help provide rational design principles for the future development of related supramolecular dyads. Seven N-annulated perylene diimide tethered rhenium (2,2′-bipyridine) supramolecular dyads are evaluated as photocatalysts for the reduction for carbon dioxide, highlighting the importance of photoexcitation pathway and electronic driving-force.![]()
Collapse
Affiliation(s)
- Josh D. B. Koenig
- 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
| | - Gregory C. Welch
- Department of Chemistry, University of Calgary, 2500 University Drive N.W., Calgary, Alberta, T2N 1N4, Canada
| |
Collapse
|
23
|
Zhang X, Shang L, Yang Z, Zhang T. A Rhenium Single-Atom Catalyst for the Electrocatalytic Oxygen Reduction Reaction. Chempluschem 2021; 86:1635-1639. [PMID: 34921594 DOI: 10.1002/cplu.202100424] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 12/02/2021] [Indexed: 12/11/2022]
Abstract
Single atom catalysts (SACs) have received a great deal of attention due to their extremely high active site utilization and superior activities. The exploration of metal SACs has been carried out by screening the elemental periodic table from first-row to second-row, and even third-row transition metals. However, Re SACs have not been reported, even if Re metal sites also play essential roles in catalyzing many important reactions. The construction of Re SACs may maximize Re catalytic sites and provide new Re active sites for higher activity. Herein, we used 1,10-phenanthroline to complex Re cations on carbon black, followed by heat treatment to obtain Re SAC. The Re SAC exhibited an oxygen reduction reaction (ORR) half-wave potential of 0.72 V versus reversible hydrogen electrode (RHE) in 0.1 M KOH, superior to Re nanoparticles catalyst (0.67 V vs. RHE). Re SAC exhibited better stability at 0.5 V vs. RHE than Pt/C, showing potential as a new electrocatalyst for ORR.
Collapse
Affiliation(s)
- Xiaohan Zhang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.,Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Lu Shang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
| | - Zhaojun Yang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.,Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Tierui Zhang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.,Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
| |
Collapse
|
24
|
Gonell S, Assaf EA, Lloret-Fillol J, Miller AJM. An Iron Bis(carbene) Catalyst for Low Overpotential CO 2 Electroreduction to CO: Mechanistic Insights from Kinetic Zone Diagrams, Spectroscopy, and Theory. ACS Catal 2021. [DOI: 10.1021/acscatal.1c04414] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Sergio Gonell
- University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Avinguda Països Catalans, 16, Tarragona 43007, Spain
| | - Eric A. Assaf
- University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
| | - Julio Lloret-Fillol
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Avinguda Països Catalans, 16, Tarragona 43007, Spain
- Catalan Institution for Research and Advanced Studies (ICREA), Passeig Lluïs Companys, 23, Barcelona 08010, Spain
| | - Alexander J. M. Miller
- University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
| |
Collapse
|
25
|
Liu JJ, Chapovetsky A, Haiges R, Marinescu SC. Effects of Protonation State on Electrocatalytic CO 2 Reduction by a Cobalt Aminopyridine Macrocyclic Complex. Inorg Chem 2021; 60:17517-17528. [PMID: 34761920 DOI: 10.1021/acs.inorgchem.1c01977] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A critical component in the reduction of CO2 to CO and H2O is the delivery of 2 equiv of protons and electrons to the CO2 molecule. The timing and sequencing of these proton and electron transfer steps are essential factors in directing the activity and selectivity for catalytic CO2 reduction. In previous studies, we have reported a series of macrocyclic aminopyridine cobalt complexes capable of reducing CO2 to CO with high faradaic efficiencies. Kinetic investigations reveal a relationship between the observed rate constant (kobs) and the number of pendant amine hydrogen bond donors minus one, suggesting the presence of a deprotonated active catalytic state. Herein, we investigate the feasibility of these proposed deprotonated complexes toward CO2 reduction. Two deprotonated derivatives, Co(L4-) and Co(L2-), of the tetraamino macrocycle Co(L) were independently synthesized and structurally characterized revealing extensive delocalization of the negative charge upon deprotonation. 1H nuclear magnetic resonance spectroscopy and ultraviolet-visible titration studies confirm that under catalytic conditions, the active form of the catalyst gradually becomes deprotonated, supporting thus the ndonor - 1 relationship with kobs. Electrochemical studies of Co(L4-) reveal that this deprotonated analogue is competent for electrocatalysis upon addition of an exogenous weak acid source, such as 2,2,2-trifluoroethanol, resulting in faradaic efficiencies for CO2-to-CO conversion identical to those observed with the fully protonated derivative (>98%).
Collapse
Affiliation(s)
- Jeffrey J Liu
- Department of Chemistry, University of Southern California, Los Angeles, California 90089, United States
| | - Alon Chapovetsky
- Department of Chemistry, University of Southern California, Los Angeles, California 90089, United States
| | - Ralf Haiges
- Department of Chemistry, University of Southern California, Los Angeles, California 90089, United States
| | - Smaranda C Marinescu
- Department of Chemistry, University of Southern California, Los Angeles, California 90089, United States
| |
Collapse
|
26
|
Mechanistic insight into electrocatalytic CO2 reduction using Lewis acid-base pairs. Inorganica Chim Acta 2021. [DOI: 10.1016/j.ica.2021.120528] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
|
27
|
Saund SS, Siegler MA, Thoi VS. Electrochemical Degradation of a Dicationic Rhenium Complex via Hoffman-Type Elimination. Inorg Chem 2021; 60:13011-13020. [PMID: 34492759 DOI: 10.1021/acs.inorgchem.1c01427] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Electrocatalytic reduction of carbon dioxide (CO2) by transition-metal catalysts is an attractive means for storing renewably sourced electricity in chemical bonds. Metal coordination compounds represent highly tunable platforms ideal for studying the fundamental stepwise transformations of CO2 into its reduced products. However, metal complexes can decompose upon extended electrolysis and form chemically distinct molecular species or, in some cases, catalytically active electrode deposits. Deciphering the degradative pathways is important for understanding the nature of the active catalyst and designing robust metal complexes for small-molecule activation. Herein, we present a new dicationic rhenium bipyridyl complex capable of multielectron ligand-centered reductions electrochemically. Our in-depth experimental and computational study provides mechanistic insight into an unusual reductively induced Hoffman-type elimination. We identify benzylic tertiary ammonium groups as an electrolytically susceptible moiety and propose key intermediates in the degradative pathway. This investigation highlights the complex interplay between the ligand and metal ion and will guide the future design of metal-organic catalysts.
Collapse
Affiliation(s)
- Simran S Saund
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Maxime A Siegler
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - V Sara Thoi
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States.,Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, Maryland 21218, United States
| |
Collapse
|
28
|
Ramuglia AR, Budhija V, Ly KH, Marquardt M, Schwalbe M, Weidinger IM. An Iron Porphyrin Complex with Pendant Pyridine Substituents Facilitates Electrocatalytic CO
2
Reduction via Second Coordination Sphere Effects. ChemCatChem 2021. [DOI: 10.1002/cctc.202100625] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Anthony R. Ramuglia
- Fakultät Chemie und Lebensmittelchemie Technische Universität Dresden Zellescher Weg 19 01069 Dresden Germany
| | - Vishal Budhija
- Institute of Chemistry Humboldt-Universität zu Berlin Brook-Taylor-Strasse 2 12489 Berlin Germany
| | - Khoa H. Ly
- Fakultät Chemie und Lebensmittelchemie Technische Universität Dresden Zellescher Weg 19 01069 Dresden Germany
| | - Michael Marquardt
- Institute of Chemistry Humboldt-Universität zu Berlin Brook-Taylor-Strasse 2 12489 Berlin Germany
| | - Matthias Schwalbe
- Institute of Chemistry Humboldt-Universität zu Berlin Brook-Taylor-Strasse 2 12489 Berlin Germany
| | - Inez M. Weidinger
- Fakultät Chemie und Lebensmittelchemie Technische Universität Dresden Zellescher Weg 19 01069 Dresden Germany
| |
Collapse
|
29
|
|
30
|
Hellman AN, Haiges R, Marinescu SC. Influence of Intermolecular Hydrogen Bonding Interactions on the Electrocatalytic Reduction of CO
2
to CO by 6,6′‐Amine Substituted Rhenium Bipyridine Complexes. ChemElectroChem 2021. [DOI: 10.1002/celc.202100306] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Ashley N. Hellman
- Department of Chemistry University of Southern California Los Angeles California 90089 United States
| | - Ralf Haiges
- Department of Chemistry University of Southern California Los Angeles California 90089 United States
| | - Smaranda C. Marinescu
- Department of Chemistry University of Southern California Los Angeles California 90089 United States
| |
Collapse
|
31
|
Kinzel NW, Werlé C, Leitner W. Transition Metal Complexes as Catalysts for the Electroconversion of CO 2 : An Organometallic Perspective. Angew Chem Int Ed Engl 2021; 60:11628-11686. [PMID: 33464678 PMCID: PMC8248444 DOI: 10.1002/anie.202006988] [Citation(s) in RCA: 115] [Impact Index Per Article: 38.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Revised: 08/11/2020] [Indexed: 12/17/2022]
Abstract
The electrocatalytic transformation of carbon dioxide has been a topic of interest in the field of CO2 utilization for a long time. Recently, the area has seen increasing dynamics as an alternative strategy to catalytic hydrogenation for CO2 reduction. While many studies focus on the direct electron transfer to the CO2 molecule at the electrode material, molecular transition metal complexes in solution offer the possibility to act as catalysts for the electron transfer. C1 compounds such as carbon monoxide, formate, and methanol are often targeted as the main products, but more elaborate transformations are also possible within the coordination sphere of the metal center. This perspective article will cover selected examples to illustrate and categorize the currently favored mechanisms for the electrochemically induced transformation of CO2 promoted by homogeneous transition metal complexes. The insights will be corroborated with the concepts and elementary steps of organometallic catalysis to derive potential strategies to broaden the molecular diversity of possible products.
Collapse
Affiliation(s)
- Niklas W. Kinzel
- Max Planck Institute for Chemical Energy ConversionStiftstr. 34–3645470Mülheim an der RuhrGermany
- Institut für Technische und Makromolekulare Chemie (ITMC)RWTH Aachen UniversityWorringer Weg 252074AachenGermany
| | - Christophe Werlé
- Max Planck Institute for Chemical Energy ConversionStiftstr. 34–3645470Mülheim an der RuhrGermany
- Ruhr University BochumUniversitätsstr. 15044801BochumGermany
| | - Walter Leitner
- Max Planck Institute for Chemical Energy ConversionStiftstr. 34–3645470Mülheim an der RuhrGermany
- Institut für Technische und Makromolekulare Chemie (ITMC)RWTH Aachen UniversityWorringer Weg 252074AachenGermany
| |
Collapse
|
32
|
Gerschel P, Cordes AL, Bimmermann S, Siegmund D, Metzler‐Nolte N, Apfel U. Investigation of Cyclam Based Re‐Complexes as Potential Electrocatalysts for the CO
2
Reduction Reaction. Z Anorg Allg Chem 2021. [DOI: 10.1002/zaac.202000450] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Philipp Gerschel
- Inorganic Chemistry I Ruhr-Universität Bochum Universitätsstraße 150 44801 Bochum Germany
| | - Anna L. Cordes
- Inorganic Chemistry I Ruhr-Universität Bochum Universitätsstraße 150 44801 Bochum Germany
| | - Sarah Bimmermann
- Inorganic Chemistry I Ruhr-Universität Bochum Universitätsstraße 150 44801 Bochum Germany
| | - Daniel Siegmund
- Department of Electrosynthesis Fraunhofer UMSICHT Osterfelder Straße 3 46047 Oberhausen Germany
| | - Nils Metzler‐Nolte
- Inorganic Chemistry I Ruhr-Universität Bochum Universitätsstraße 150 44801 Bochum Germany
| | - Ulf‐Peter Apfel
- Inorganic Chemistry I Ruhr-Universität Bochum Universitätsstraße 150 44801 Bochum Germany
- Department of Electrosynthesis Fraunhofer UMSICHT Osterfelder Straße 3 46047 Oberhausen Germany
| |
Collapse
|
33
|
Yang J, He S, Wu Q, Zhang P, Chen L, Huang F, Li F. A bio-inspired mononuclear manganese catalyst for high-rate electrochemical hydrogen production. Dalton Trans 2021; 50:4783-4788. [PMID: 33725080 DOI: 10.1039/d1dt00672j] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
[FeFe]-hydrogenase (H2ase) catalyzes hydrogen evolution reactions (HERs), with an excellent performance that rivals that of platinum, the active site of which is built with crucial structural features required for efficient H-H bond formation. Herein, we report a mononuclear manganese complex (1) that contains a square pyramid coordination sphere and an intramolecular aniline as the proton relay, consistent with the crucial features of the active site in H2ase. Benefitting from these features, complex 1 electrocatalyzes the HER with a turnover frequency (TOF) exceeding 10 000 s-1 at -1.45 V (versus the ferrocenium/ferrocene couple) using anilinium tetrafluoroborate as a proton source. This work provides the first Mn-based functional model of H2ase, serving as a new paradigm for a high performance, low cost, environmentally benign hydrogen production electrocatalyst.
Collapse
Affiliation(s)
- Jie Yang
- State Key Laboratory of Environment-Friendly Energy Material, School of Materials Science and Engineering. Southwest University of Science and Technology, Mianyang 621010, P. R. China.
| | | | | | | | | | | | | |
Collapse
|
34
|
Nganga JK, Wolf LM, Mullick K, Reinheimer E, Saucedo C, Wilson ME, Grice KA, Ertem MZ, Angeles-Boza AM. Methane Generation from CO 2 with a Molecular Rhenium Catalyst. Inorg Chem 2021; 60:3572-3584. [PMID: 33616393 DOI: 10.1021/acs.inorgchem.0c02579] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The atomic-level tunability of molecular structures is a compelling reason to develop homogeneous catalysts for challenging reactions such as the electrochemical reduction of carbon dioxide to valuable C1-Cn products. Of particular interest is methane, the largest component of natural gas. Herein, we report a series of three isomeric rhenium tricarbonyl complexes coordinated by the asymmetric diimine ligands 2-(isoquinolin-1-yl)-4,5-dihydrooxazole (quin-1-oxa), 2-(quinolin-2-yl)-4,5-dihydrooxazole (quin-2-oxa), and 2-(isoquinolin-3-yl)-4,5-dihydrooxazole (quin-3-oxa) that catalyze the reduction of CO2 to carbon monoxide and methane, albeit the latter with a low efficiency. To our knowledge, these complexes are the first examples of rhenium(I) catalysts capable of converting carbon dioxide into methane. Re(quin-1-oxa)(CO)3Cl (1), Re(quin-2-oxa)(CO)3Cl (2), and Re(quin-3-oxa)(CO)3Cl (3) were characterized and studied using a variety of electrochemical and spectroscopic techniques. In bulk electrolysis experiments, the three complexes reduce CO2 to CO and CH4. When the controlled-potential electrolysis experiments are performed at -2.5 V (vs Fc+/0) and in the presence of the Brønsted acid 2,2,2-trifluoroethanol, methane is produced with turnover numbers that range from 1.3 to 1.8. Isotope labeling experiments using 13CO2 atmosphere produce 13CH4 (m/z = 17) confirming that methane originates from CO2 reduction. Theoretical calculations are performed to investigate the mechanistic aspects of the 8e-/8H+ reduction of CO2 to CH4. A ligand-assisted pathway is proposed to be an efficient pathway in the formation of CH4. Delocalization of the electron density on the (iso)quinoline moiety upon reduction stabilizes the key carbonyl intermediate leading to additional reactivity of this ligand. These results should aid the development of more robust catalytic systems that produce CH4 from CO2.
Collapse
Affiliation(s)
- John K Nganga
- Department of Chemistry, University of Connecticut, Storrs, Connecticut 06269-30602, United States
| | - Lucienna M Wolf
- Department of Chemistry and Biochemistry, DePaul University, Chicago, Illinois 60614, United States
| | - Kankana Mullick
- Department of Chemistry, University of Connecticut, Storrs, Connecticut 06269-30602, United States
| | - Eric Reinheimer
- Rigaku, 9009 New Trails Drive, The Woodlands, Texas 77381, United States
| | - Cesar Saucedo
- Department of Chemistry and Biochemistry, DePaul University, Chicago, Illinois 60614, United States
| | - Megan E Wilson
- Department of Chemistry and Biochemistry, DePaul University, Chicago, Illinois 60614, United States
| | - Kyle A Grice
- Department of Chemistry and Biochemistry, DePaul University, Chicago, Illinois 60614, United States
| | - Mehmed Z Ertem
- Chemistry Division, Energy & Photon Sciences Directorate, Brookhaven National Laboratory, Building 555A, Upton, New York 11973, United States
| | - Alfredo M Angeles-Boza
- Department of Chemistry, University of Connecticut, Storrs, Connecticut 06269-30602, United States.,Institute of Materials Science, University of Connecticut, Storrs, Connecticut 06269-3060, United States
| |
Collapse
|
35
|
Rotundo L, Grills DC, Gobetto R, Priola E, Nervi C, Polyansky DE, Fujita E. Photochemical CO
2
Reduction Using Rhenium(I) Tricarbonyl Complexes with Bipyridyl‐Type Ligands with and without Second Coordination Sphere Effects. CHEMPHOTOCHEM 2021. [DOI: 10.1002/cptc.202000307] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Laura Rotundo
- Chemistry Department University of Torino Via P. Giuria 7 10125 Torino Italy
- CIRCC Via Celso Ulpiani 27, 70126 Bari Italy
| | - David C. Grills
- Chemistry Division Brookhaven National Laboratory Upton NY 11973–5000 USA
| | - Roberto Gobetto
- Chemistry Department University of Torino Via P. Giuria 7 10125 Torino Italy
- CIRCC Via Celso Ulpiani 27, 70126 Bari Italy
| | - Emanuele Priola
- Chemistry Department University of Torino Via P. Giuria 7 10125 Torino Italy
- CIRCC Via Celso Ulpiani 27, 70126 Bari Italy
| | - Carlo Nervi
- Chemistry Department University of Torino Via P. Giuria 7 10125 Torino Italy
- CIRCC Via Celso Ulpiani 27, 70126 Bari Italy
| | | | - Etsuko Fujita
- Chemistry Division Brookhaven National Laboratory Upton NY 11973–5000 USA
| |
Collapse
|
36
|
Roy SS, Talukdar K, Jurss JW. Electro- and Photochemical Reduction of CO 2 by Molecular Manganese Catalysts: Exploring the Positional Effect of Second-Sphere Hydrogen-Bond Donors. CHEMSUSCHEM 2021; 14:662-670. [PMID: 33124150 DOI: 10.1002/cssc.202001940] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Revised: 10/20/2020] [Indexed: 06/11/2023]
Abstract
A series of molecular Mn catalysts featuring aniline groups in the second-coordination sphere has been developed for electrochemical and photochemical CO2 reduction. The arylamine moieties were installed at the 6 position of 2,2'-bipyridine (bpy) to generate a family of isomers in which the primary amine is located at the ortho- (1-Mn), meta- (2-Mn), or para-site (3-Mn) of the aniline ring. The proximity of the second-sphere functionality to the active site is a critical factor in determining catalytic performance. Catalyst 1-Mn, possessing the shortest distance between the amine and the active site, significantly outperformed the rest of the series and exhibited a 9-fold improvement in turnover frequency relative to parent catalyst Mn(bpy)(CO)3 Br (901 vs. 102 s-1 , respectively) at 150 mV lower overpotential. The electrocatalysts operated with high faradaic efficiencies (≥70 %) for CO evolution using trifluoroethanol as a proton source. Notably, under photocatalytic conditions, a concentration-dependent shift in product selectivity from CO (at high [catalyst]) to HCO2 H (at low [catalyst]) was observed with turnover numbers up to 4760 for formic acid and high selectivities for reduced carbon products.
Collapse
Affiliation(s)
- Sayontani Sinha Roy
- Department of Chemistry and Biochemistry, University of Mississippi University, Mississippi, 38677, USA
| | - Kallol Talukdar
- Department of Chemistry and Biochemistry, University of Mississippi University, Mississippi, 38677, USA
| | - Jonah W Jurss
- Department of Chemistry and Biochemistry, University of Mississippi University, Mississippi, 38677, USA
| |
Collapse
|
37
|
Kinzel NW, Werlé C, Leitner W. Übergangsmetallkomplexe als Katalysatoren für die elektrische Umwandlung von CO
2
– eine metallorganische Perspektive. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202006988] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Niklas W. Kinzel
- Max-Planck-Institut für Chemische Energiekonversion Stiftstraße 34–36 45470 Mülheim an der Ruhr Deutschland
- Institut für Technische und Makromolekulare Chemie (ITMC) RWTH Aachen University Worringer Weg 2 52074 Aachen Deutschland
| | - Christophe Werlé
- Max-Planck-Institut für Chemische Energiekonversion Stiftstraße 34–36 45470 Mülheim an der Ruhr Deutschland
- Ruhr-Universität Bochum Universitätsstraße 150 44801 Bochum Deutschland
| | - Walter Leitner
- Max-Planck-Institut für Chemische Energiekonversion Stiftstraße 34–36 45470 Mülheim an der Ruhr Deutschland
- Institut für Technische und Makromolekulare Chemie (ITMC) RWTH Aachen University Worringer Weg 2 52074 Aachen Deutschland
| |
Collapse
|
38
|
Saha S, Sahil ST, Mazumder MMR, Stephens AM, Cronin B, Duin EC, Jurss JW, Farnum BH. Synthesis, characterization, and electrocatalytic activity of bis(pyridylimino)isoindoline Cu(ii) and Ni(ii) complexes. Dalton Trans 2021; 50:926-935. [DOI: 10.1039/d0dt03030a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Similar structure observed between Cu(ii) and Ni(ii) based bis(pyridylimino)isoindole complexes, yet greatly different levels of catalytic activity.
Collapse
Affiliation(s)
- Soumen Saha
- Department of Chemistry and Biochemistry
- Auburn University
- Auburn
- USA
| | - Sha Tamanna Sahil
- Department of Chemistry and Biochemistry
- University of Mississippi
- University
- USA
| | | | | | - Bryan Cronin
- Department of Chemistry and Biochemistry
- Auburn University
- Auburn
- USA
| | - Evert C. Duin
- Department of Chemistry and Biochemistry
- Auburn University
- Auburn
- USA
| | - Jonah W. Jurss
- Department of Chemistry and Biochemistry
- University of Mississippi
- University
- USA
| | - Byron H. Farnum
- Department of Chemistry and Biochemistry
- Auburn University
- Auburn
- USA
| |
Collapse
|
39
|
Kiernicki JJ, Norwine EE, Lovasz MA, Zeller M, Szymczak NK. Mobility of Lewis acids within the secondary coordination sphere: toward a model for cooperative substrate binding. Chem Commun (Camb) 2020; 56:13105-13108. [PMID: 33016291 PMCID: PMC7606458 DOI: 10.1039/d0cc05121g] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Distance dependence of appended Lewis acids in N2H4 binding and deprotonation was evaluated within a series of zinc complexes. Variation of spacer-length to a tethered trialkylborane Lewis acid revealed distinct preferences for binding and stabilization of the resulting deprotonated N2H3- unit.
Collapse
Affiliation(s)
- John J Kiernicki
- University of Michigan, 930 N. University, Ann Arbor, MI 48109, USA.
| | | | | | | | | |
Collapse
|
40
|
Mukherjee J, Siewert I. Manganese and Rhenium Tricarbonyl Complexes Equipped with Proton Relays in the Electrochemical CO
2
Reduction Reaction. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000738] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Jyotima Mukherjee
- Institut für Anorganische Chemie Universität Göttingen Tammannstr. 4 37077 Göttingen Germany
| | - Inke Siewert
- Institut für Anorganische Chemie Universität Göttingen Tammannstr. 4 37077 Göttingen Germany
| |
Collapse
|
41
|
Ye Y, Liu Y, Li Z, Zou X, Wu H, Lin S. Highly selective and active Cu-In 2O 3/C nanocomposite for electrocatalytic reduction of CO 2 to CO. J Colloid Interface Sci 2020; 586:528-537. [PMID: 33198976 DOI: 10.1016/j.jcis.2020.10.118] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2020] [Revised: 10/23/2020] [Accepted: 10/26/2020] [Indexed: 01/27/2023]
Abstract
The Cu-In2O3/C nanocomposite was prepared by a simple solid-phase reduction method. The introduction of In2O3 into Cu/C to form the Cu-In2O3/C nanocomposite evidently enhances the electrocatalytic activity for the selective reduction of CO2 to CO. Specifically, the Cu-In2O3/C nanocomposite exhibits higher Faraday efficiency (FE = 86.7%) at -0.48 V vs. the reversible hydrogen electrode (RHE) in the electrocatalytic reduction of CO2 to CO and larger current densities (55 mA cm-2) under a low overpotential (-1.08 V vs. RHE). These indicate its superior performance over many of the reported Cu-based catalysts [1-4]. It was also found that by rationally adjusting the applied potential, tunable syngas can be formed, which can be used to synthesize formic acid, methyl ether, methanol, synthetic fuels, or other bulk chemicals through appropriate industrial processes. Furthermore, the Cu-In2O3/C nanocomposite maintains good stability in the electrocatalytic reduction of CO2. This work demonstrates a novel strategy to convert CO2 into desired products with high energy efficiency and large current density under low overpotential by the rational designing of non-precious metal catalysts.
Collapse
Affiliation(s)
- Yanzhu Ye
- College of Chemistry & Materials Science, Fujian Normal University, Fuzhou 350007, China; Department of Science Research and Training, Fujian Institute of Education, Fuzhou 350001, China
| | - Ying Liu
- College of Chemistry & Materials Science, Fujian Normal University, Fuzhou 350007, China
| | - Zhongshui Li
- College of Chemistry & Materials Science, Fujian Normal University, Fuzhou 350007, China
| | - Xiaohuan Zou
- College of Chemistry & Materials Science, Fujian Normal University, Fuzhou 350007, China
| | - Hui Wu
- College of Chemistry & Materials Science, Fujian Normal University, Fuzhou 350007, China
| | - Shen Lin
- College of Chemistry & Materials Science, Fujian Normal University, Fuzhou 350007, China.
| |
Collapse
|
42
|
Merillas B, Cuéllar E, Diez-Varga A, Torroba T, García-Herbosa G, Fernández S, Lloret-Fillol J, Martín-Alvarez JM, Miguel D, Villafañe F. Luminescent Rhenium(I)tricarbonyl Complexes Containing Different Pyrazoles and Their Successive Deprotonation Products: CO 2 Reduction Electrocatalysts. Inorg Chem 2020; 59:11152-11165. [PMID: 32705866 DOI: 10.1021/acs.inorgchem.0c01654] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Cationic fac-[Re(CO)3(pz*H)(pypzH)]OTf (pz*H = pyrazole, pzH; 3,5-dimethylpyrazole, dmpzH; indazole, indzH; 3-(2-pyridyl)pyrazole, pypzH) were obtained from fac-[ReBr(CO)3(pypzH)] by halide abstraction with AgOTf and subsequent addition of the corresponding pyrazole. Successive deprotonation with Na2CO3 and NaOH gave neutral fac-[Re(CO)3(pz*H)(pypz)] and anionic Na{fac-[Re(CO)3(pz*)(pypz)]} complexes, respectively. Cationic fac-[Re(CO)3(pz*H)(pypzH)]OTf, neutral complexes fac-[Re(CO)3(pz*H)(pypz)], and fac-[Re(CO)3(pypz)2Na] were subjected to photophysical and electrochemical studies. They exhibit phosphorescent decays from a prevalently 3MLCT excited state with quantum yields (Φ) in the range between 0.03 and 0.58 and long lifetimes (τ from 220 to 869 ns). The electrochemical behavior in Ar atmosphere of cationic and neutral complexes indicates that the oxidation processes assigned to ReI → ReII occurs at lower potentials for the neutral complex compared to cationic complex. The reduction processes occur at the ligands and do not depend on the charge of the complexes. The electrochemical behavior in CO2 saturated media is consistent with CO2 electrocatalyzed reduction, where the values of the catalytic activity [icat(CO2)/icat(Ar)] ranged from 2.7 to 11.5 (compared to 8.1 for fac-[Re(CO)3Cl(bipy)] studied as a reference). Controlled potential electrolysis for the pyrazole cationic (3a) and neutral (4a) complexes after 1 h affords CO in faraday yields of 61 and 89%, respectively. These values are higher for indazole complexes and may be related to the acidity of the coordinated pyrazole.
Collapse
Affiliation(s)
- Beatriz Merillas
- GIR MIOMeT-IU Cinquima-Química Inorgánica, Facultad de Ciencias, Campus Miguel Delibes, Universidad de Valladolid, 47011 Valladolid, Spain
| | - Elena Cuéllar
- GIR MIOMeT-IU Cinquima-Química Inorgánica, Facultad de Ciencias, Campus Miguel Delibes, Universidad de Valladolid, 47011 Valladolid, Spain
| | - Alberto Diez-Varga
- Departamento de Química, Facultad de Ciencias, Universidad de Burgos, 09001 Burgos, Spain
| | - Tomás Torroba
- Departamento de Química, Facultad de Ciencias, Universidad de Burgos, 09001 Burgos, Spain
| | - Gabriel García-Herbosa
- Departamento de Química, Facultad de Ciencias, Universidad de Burgos, 09001 Burgos, Spain
| | - Sergio Fernández
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Avinguda Països Catalans 16, 43007 Tarragona, Spain
| | - Julio Lloret-Fillol
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Avinguda Països Catalans 16, 43007 Tarragona, Spain.,Catalan Institution for Research and Advanced Studies (ICREA), Passeig Lluïs Companys, 23, 08010 Barcelona, Spain
| | - Jose M Martín-Alvarez
- GIR MIOMeT-IU Cinquima-Química Inorgánica, Facultad de Ciencias, Campus Miguel Delibes, Universidad de Valladolid, 47011 Valladolid, Spain
| | - Daniel Miguel
- GIR MIOMeT-IU Cinquima-Química Inorgánica, Facultad de Ciencias, Campus Miguel Delibes, Universidad de Valladolid, 47011 Valladolid, Spain
| | - Fernando Villafañe
- GIR MIOMeT-IU Cinquima-Química Inorgánica, Facultad de Ciencias, Campus Miguel Delibes, Universidad de Valladolid, 47011 Valladolid, Spain
| |
Collapse
|