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Rodríguez-Jiménez S, Song H, Lam E, Wright D, Pannwitz A, Bonke SA, Baumberg JJ, Bonnet S, Hammarström L, Reisner E. Self-Assembled Liposomes Enhance Electron Transfer for Efficient Photocatalytic CO 2 Reduction. J Am Chem Soc 2022; 144:9399-9412. [PMID: 35594410 PMCID: PMC9164230 DOI: 10.1021/jacs.2c01725] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Light-driven conversion of CO2 to chemicals provides a sustainable alternative to fossil fuels, but homogeneous systems are typically limited by cross reactivity between different redox half reactions and inefficient charge separation. Herein, we present the bioinspired development of amphiphilic photosensitizer and catalyst pairs that self-assemble in lipid membranes to overcome some of these limitations and enable photocatalytic CO2 reduction in liposomes using precious metal-free catalysts. Using sodium ascorbate as a sacrificial electron source, a membrane-anchored alkylated cobalt porphyrin demonstrates higher catalytic CO production (1456 vs 312 turnovers) and selectivity (77 vs 11%) compared to its water-soluble nonalkylated counterpart. Time-resolved and steady-state spectroscopy revealed that self-assembly facilitates this performance enhancement by enabling a charge-separation state lifetime increase of up to two orders of magnitude in the dye while allowing for a ninefold faster electron transfer to the catalyst. Spectroelectrochemistry and density functional theory calculations of the alkylated Co porphyrin catalyst support a four-electron-charging mechanism that activates the catalyst prior to catalysis, together with key catalytic intermediates. Our molecular liposome system therefore benefits from membrane immobilization and provides a versatile and efficient platform for photocatalysis.
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Affiliation(s)
| | - Hongwei Song
- Department of Chemistry - Angstrom Laboratory, Uppsala University, Box 523, 751 20 Uppsala, Sweden
| | - Erwin Lam
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, U.K
| | - Demelza Wright
- Nanophotonics Centre, Department of Physics, Cavendish Laboratory, University of Cambridge, Cambridge CB3 0HE, U.K
| | - Andrea Pannwitz
- Leiden Institute of Chemistry, Leiden University, Einsteinweg 55, 2333 CC Leiden, The Netherlands
| | - Shannon A Bonke
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, U.K
| | - Jeremy J Baumberg
- Nanophotonics Centre, Department of Physics, Cavendish Laboratory, University of Cambridge, Cambridge CB3 0HE, U.K
| | - Sylvestre Bonnet
- Leiden Institute of Chemistry, Leiden University, Einsteinweg 55, 2333 CC Leiden, The Netherlands
| | - Leif Hammarström
- Department of Chemistry - Angstrom Laboratory, Uppsala University, Box 523, 751 20 Uppsala, Sweden
| | - Erwin Reisner
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, U.K
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Ly KH, Weidinger IM. Understanding active sites in molecular (photo)electrocatalysis through complementary vibrational spectroelectrochemistry. Chem Commun (Camb) 2021; 57:2328-2342. [DOI: 10.1039/d0cc07376h] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Highlighting vibrational spectroelectrochemistry for the investigation of synthetic molecular (photo) electrocatalysts for key energy conversion reactions.
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Affiliation(s)
- Khoa H. Ly
- Lehrstuhl für Elektrochemie
- Fakultät für Chemie und Lebensmittelchemie
- Technische Universität Dresden
- Andreas-Schubert-Bau
- Zellescher Weg 19
| | - Inez M. Weidinger
- Lehrstuhl für Elektrochemie
- Fakultät für Chemie und Lebensmittelchemie
- Technische Universität Dresden
- Andreas-Schubert-Bau
- Zellescher Weg 19
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A pyridinic Fe-N 4 macrocycle models the active sites in Fe/N-doped carbon electrocatalysts. Nat Commun 2020; 11:5283. [PMID: 33077736 PMCID: PMC7572418 DOI: 10.1038/s41467-020-18969-6] [Citation(s) in RCA: 134] [Impact Index Per Article: 33.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Accepted: 09/22/2020] [Indexed: 11/09/2022] Open
Abstract
Iron- and nitrogen-doped carbon (Fe-N-C) materials are leading candidates to replace platinum catalysts for the oxygen reduction reaction (ORR) in fuel cells; however, their active site structures remain poorly understood. A leading postulate is that the iron-containing active sites exist primarily in a pyridinic Fe-N4 ligation environment, yet, molecular model catalysts generally feature pyrrolic coordination. Herein, we report a molecular pyridinic hexaazacyclophane macrocycle, (phen2N2)Fe, and compare its spectroscopic, electrochemical, and catalytic properties for ORR to a typical Fe-N-C material and prototypical pyrrolic iron macrocycles. N 1s XPS and XAS signatures for (phen2N2)Fe are remarkably similar to those of Fe-N-C. Electrochemical studies reveal that (phen2N2)Fe has a relatively high Fe(III/II) potential with a correlated ORR onset potential within 150 mV of Fe-N-C. Unlike the pyrrolic macrocycles, (phen2N2)Fe displays excellent selectivity for four-electron ORR, comparable to Fe-N-C materials. The aggregate spectroscopic and electrochemical data demonstrate that (phen2N2)Fe is a more effective model of Fe-N-C active sites relative to the pyrrolic iron macrocycles, thereby establishing a new molecular platform that can aid understanding of this important class of catalytic materials.
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4
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Efficient Reduction of Dioxygen with Ferrocene Catalyzed by Thiocarbohydrazone Tetranuclear Cobalt(III) Coordination Compound. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.5833] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Götz R, Ly KH, Wrzolek P, Dianat A, Croy A, Cuniberti G, Hildebrandt P, Schwalbe M, Weidinger IM. Influence of Mesityl and Thiophene Peripheral Substituents on Surface Attachment, Redox Chemistry, and ORR Activity of Molecular Iron Porphyrin Catalysts on Electrodes. Inorg Chem 2019; 58:10637-10647. [DOI: 10.1021/acs.inorgchem.9b00043] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Robert Götz
- Faculty of Chemistry and Food Chemistry, Dresden University of Technology, 01062 Dresden, Germany
| | - Khoa H. Ly
- Faculty of Chemistry and Food Chemistry, Dresden University of Technology, 01062 Dresden, Germany
| | - Pierre Wrzolek
- Institute of Chemistry, Humboldt-Universität zu Berlin, 12489 Berlin, Germany
| | - Arezoo Dianat
- Institute for Materials Science and Max Bergmann Center of Biomaterials, Dresden University of Technology, 01062 Dresden, Germany
| | - Alexander Croy
- Institute for Materials Science and Max Bergmann Center of Biomaterials, Dresden University of Technology, 01062 Dresden, Germany
| | - Giancarlo Cuniberti
- Center for Advancing Electronics, Dresden Center for Computational Materials Science, Dresden University of Technology, 01062 Dresden, Germany
| | - Peter Hildebrandt
- Institute of Chemistry, Technische Universität Berlin, 10623 Berlin, Germany
| | - Matthias Schwalbe
- Institute of Chemistry, Humboldt-Universität zu Berlin, 12489 Berlin, Germany
| | - Inez M. Weidinger
- Faculty of Chemistry and Food Chemistry, Dresden University of Technology, 01062 Dresden, Germany
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6
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Neumann B, Götz R, Wrzolek P, Scheller FW, Weidinger IM, Schwalbe M, Wollenberger U. Enhancement of the Electrocatalytic Activity of Thienyl‐Substituted Iron Porphyrin Electropolymers by a Hangman Effect. ChemCatChem 2018. [DOI: 10.1002/cctc.201800934] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Bettina Neumann
- Institute for Biochemistry and BiologyUniversity Potsdam Karl-Liebknecht-Str. 24–25 Potsdam 14476 Germany
| | - Robert Götz
- Department of Chemistry and Food ChemistryTechnische Universität Dresden Zellescher Weg 19 Dresden 01069 Germany
| | - Pierre Wrzolek
- Institute for ChemistryHumboldt-Universität zu Berlin Brook-Taylor-Str. 2 Berlin 12489 Germany
| | - Frieder W. Scheller
- Institute for Biochemistry and BiologyUniversity Potsdam Karl-Liebknecht-Str. 24–25 Potsdam 14476 Germany
| | - Inez M. Weidinger
- Department of Chemistry and Food ChemistryTechnische Universität Dresden Zellescher Weg 19 Dresden 01069 Germany
| | - Matthias Schwalbe
- Institute for ChemistryHumboldt-Universität zu Berlin Brook-Taylor-Str. 2 Berlin 12489 Germany
| | - Ulla Wollenberger
- Institute for Biochemistry and BiologyUniversity Potsdam Karl-Liebknecht-Str. 24–25 Potsdam 14476 Germany
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Kielb P, Horch M, Wrzolek P, Goetz R, Ly KH, Kozuch J, Schwalbe M, Weidinger IM. Hydrogen evolution by cobalt hangman porphyrins under operating conditions studied by vibrational spectro-electrochemistry. Catal Sci Technol 2018. [DOI: 10.1039/c7cy02253k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The structure of cobalt hangman complexes adsorbed on electrodes during HER was analysed via surface enhanced Raman spectroscopy.
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Affiliation(s)
- Patrycja Kielb
- Department of Chemistry
- Technische Universität Berlin
- 10623 Berlin
- Germany
- Division of Chemistry and Chemical Engineering
| | - Marius Horch
- Department of Chemistry
- Technische Universität Berlin
- 10623 Berlin
- Germany
| | - Pierre Wrzolek
- Department of Chemistry
- Humboldt Universität zu Berlin
- 12489 Berlin
- Germany
| | - Robert Goetz
- Department of Chemistry and Food Chemistry
- Technische Universität Dresden
- 01062 Dresden
- Germany
| | - Khoa H. Ly
- Department of Chemistry
- University of Cambridge
- Cambridge CB2 1EW
- UK
| | - Jacek Kozuch
- Department of Chemistry
- Stanford University
- Stanford
- USA
| | - Matthias Schwalbe
- Department of Chemistry
- Humboldt Universität zu Berlin
- 12489 Berlin
- Germany
| | - Inez M. Weidinger
- Department of Chemistry and Food Chemistry
- Technische Universität Dresden
- 01062 Dresden
- Germany
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