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Suremann NF, McCarthy BD, Gschwind W, Kumar A, Johnson BA, Hammarström L, Ott S. Molecular Catalysis of Energy Relevance in Metal-Organic Frameworks: From Higher Coordination Sphere to System Effects. Chem Rev 2023; 123:6545-6611. [PMID: 37184577 DOI: 10.1021/acs.chemrev.2c00587] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
The modularity and synthetic flexibility of metal-organic frameworks (MOFs) have provoked analogies with enzymes, and even the term MOFzymes has been coined. In this review, we focus on molecular catalysis of energy relevance in MOFs, more specifically water oxidation, oxygen and carbon dioxide reduction, as well as hydrogen evolution in context of the MOF-enzyme analogy. Similar to enzymes, catalyst encapsulation in MOFs leads to structural stabilization under turnover conditions, while catalyst motifs that are synthetically out of reach in a homogeneous solution phase may be attainable as secondary building units in MOFs. Exploring the unique synthetic possibilities in MOFs, specific groups in the second and third coordination sphere around the catalytic active site have been incorporated to facilitate catalysis. A key difference between enzymes and MOFs is the fact that active site concentrations in the latter are often considerably higher, leading to charge and mass transport limitations in MOFs that are more severe than those in enzymes. High catalyst concentrations also put a limit on the distance between catalysts, and thus the available space for higher coordination sphere engineering. As transport is important for MOF-borne catalysis, a system perspective is chosen to highlight concepts that address the issue. A detailed section on transport and light-driven reactivity sets the stage for a concise review of the currently available literature on utilizing principles from Nature and system design for the preparation of catalytic MOF-based materials.
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Affiliation(s)
- Nina F Suremann
- Department of Chemistry - Ångström Laboratory, Uppsala University, Box 523, 75120 Uppsala, Sweden
| | - Brian D McCarthy
- Department of Chemistry - Ångström Laboratory, Uppsala University, Box 523, 75120 Uppsala, Sweden
| | - Wanja Gschwind
- Department of Chemistry - Ångström Laboratory, Uppsala University, Box 523, 75120 Uppsala, Sweden
| | - Amol Kumar
- Department of Chemistry - Ångström Laboratory, Uppsala University, Box 523, 75120 Uppsala, Sweden
| | - Ben A Johnson
- Department of Chemistry - Ångström Laboratory, Uppsala University, Box 523, 75120 Uppsala, Sweden
- Technical University Munich (TUM), Campus Straubing for Biotechnology and Sustainability, Uferstraße 53, 94315 Straubing, Germany
| | - Leif Hammarström
- Department of Chemistry - Ångström Laboratory, Uppsala University, Box 523, 75120 Uppsala, Sweden
| | - Sascha Ott
- Department of Chemistry - Ångström Laboratory, Uppsala University, Box 523, 75120 Uppsala, Sweden
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Chen R, Liu S, Zhang Y. A nanoelectrode-based study of water splitting electrocatalysts. MATERIALS HORIZONS 2023; 10:52-64. [PMID: 36485037 DOI: 10.1039/d2mh01143c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
The development of low-cost and efficient catalytic materials for key reactions like water splitting, CO2 reduction and N2 reduction is crucial for fulfilling the growing energy consumption demands and the pursuit of renewable and sustainable energy. Conventional electrochemical measurements at the macroscale lack the potential to characterize single catalytic entities and nanoscale surface features on the surface of a catalytic material. Recently, promising results have been obtained using nanoelectrodes as ultra-small platforms for the study of the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) on innovative catalytic materials at the nanoscale. In this minireview, we summarize the recent progress in the nanoelectrode-based studies on the HER and OER on various nanostructured catalytic materials. These electrocatalysts can be generally categorized into two groups: 0-dimensional (0D) single atom/molecule/cluster/nanoparticles and 2-dimensional (2D) nanomaterials. Controlled growth as well as the electrochemical characterization of single isolated atoms, molecules, clusters and nanoparticles has been achieved on nanoelectrodes. Moreover, nanoelectrodes greatly enhanced the spatial resolution of scanning probe techniques, which enable studies at the surface features of 2D nanomaterials, including surface defects, edges and nanofacets at the boundary of a phase. Nanoelectrode-based studies on the catalytic materials can provide new insights into the reaction mechanisms and catalytic properties, which will facilitate the pursuit of sustainable energy and help to solve CO2 release issues.
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Affiliation(s)
- Ran Chen
- Jiangsu Province Key Laboratory of Critical Care Medicine, Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, Jiangsu Province Hi-Tech Key Laboratory for Bio-Medical Research, School of Chemistry and Chemical Engineering, Southeast University, Nanjing, 211189, China.
| | - Songqin Liu
- Jiangsu Province Key Laboratory of Critical Care Medicine, Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, Jiangsu Province Hi-Tech Key Laboratory for Bio-Medical Research, School of Chemistry and Chemical Engineering, Southeast University, Nanjing, 211189, China.
| | - Yuanjian Zhang
- Jiangsu Province Key Laboratory of Critical Care Medicine, Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, Jiangsu Province Hi-Tech Key Laboratory for Bio-Medical Research, School of Chemistry and Chemical Engineering, Southeast University, Nanjing, 211189, China.
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3
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A mechanistic approach to the electrografting of carbon surfaces and electrochemical properties of the grafted films – A critical review. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2022.140693] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Ramírez‐Chan DE, Fragoso R, Díaz‐Sánchez BR, González FJ. Role of the Supporting Electrolyte Ions and Additives on the Electron Transport Properties of Electrografted Films Bearing Ferrocenyl Moieties. ChemElectroChem 2021. [DOI: 10.1002/celc.202101014] [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)
- Daniel E. Ramírez‐Chan
- Departamento de Química >Centro de Investigación y de Estudios Avanzados del IPN Av. Instituto Politécnico Nacional 2508 C.P. 07360 Mexico City Mexico
| | - Rogelio Fragoso
- Departamento de Física Centro de Investigación y de Estudios Avanzados del IPN Av. Instituto Politécnico Nacional 2508 C.P. 07360 Mexico City Mexico
| | - Blanca R. Díaz‐Sánchez
- Departamento de Química >Centro de Investigación y de Estudios Avanzados del IPN Av. Instituto Politécnico Nacional 2508 C.P. 07360 Mexico City Mexico
| | - Felipe J. González
- Departamento de Química >Centro de Investigación y de Estudios Avanzados del IPN Av. Instituto Politécnico Nacional 2508 C.P. 07360 Mexico City Mexico
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Costentin C, Limoges B, Robert M, Tard C. A Pioneering Career in Electrochemistry: Jean-Michel Savéant. ACS Catal 2021. [DOI: 10.1021/acscatal.0c05632] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Cyrille Costentin
- Département de Chimie Moléculaire, Université Grenoble-Alpes, CNRS, UMR 5250, 38000 Grenoble, France
- Université de Paris, F-75006 Paris, France
| | - Benoît Limoges
- Université de Paris, Laboratoire d’Electrochimie Moléculaire, CNRS, F-75006 Paris, France
| | - Marc Robert
- Université de Paris, Laboratoire d’Electrochimie Moléculaire, CNRS, F-75006 Paris, France
- Institut Universitaire de France, F-75005 Paris, France
| | - Cédric Tard
- Laboratoire de Chimie Moléculaire (LCM), CNRS, École Polytechnique, Institut Polytechnique de Paris, 91120 Palaiseau, France
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6
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Tuning the reactivity of cobalt-based H2 production electrocatalysts via the incorporation of the peripheral basic functionalities. Coord Chem Rev 2020. [DOI: 10.1016/j.ccr.2020.213335] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Boutin E, Merakeb L, Ma B, Boudy B, Wang M, Bonin J, Anxolabéhère-Mallart E, Robert M. Molecular catalysis of CO 2 reduction: recent advances and perspectives in electrochemical and light-driven processes with selected Fe, Ni and Co aza macrocyclic and polypyridine complexes. Chem Soc Rev 2020; 49:5772-5809. [PMID: 32697210 DOI: 10.1039/d0cs00218f] [Citation(s) in RCA: 134] [Impact Index Per Article: 33.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Earth-abundant Fe, Ni, and Co aza macrocyclic and polypyridine complexes have been thoroughly investigated for CO2 electrochemical and visible-light-driven reduction. Since the first reports in the 1970s, an enormous body of work has been accumulated regarding the two-electron two-proton reduction of the gas, along with mechanistic and spectroscopic efforts to rationalize the reactivity and establish guidelines for structure-reactivity relationships. The ability to fine tune the ligand structure and the almost unlimited possibilities of designing new complexes have led to highly selective and efficient catalysts. Recent efforts toward developing hybrid systems upon combining molecular catalysts with conductive or semi-conductive materials have converged to high catalytic performances in water solutions, to the inclusion of these catalysts into CO2 electrolyzers and photo-electrochemical devices, and to the discovery of catalytic pathways beyond two electrons. Combined with the continuous mechanistic efforts and new developments for in situ and in operando spectroscopic studies, molecular catalysis of CO2 reduction remains a highly creative approach.
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Affiliation(s)
- E Boutin
- Université de Paris, Laboratoire d'Electrochimie Moléculaire, CNRS, F-75006 Paris, France.
| | - L Merakeb
- Université de Paris, Laboratoire d'Electrochimie Moléculaire, CNRS, F-75006 Paris, France.
| | - B Ma
- Université de Paris, Laboratoire d'Electrochimie Moléculaire, CNRS, F-75006 Paris, France.
| | - B Boudy
- Université de Paris, Laboratoire d'Electrochimie Moléculaire, CNRS, F-75006 Paris, France.
| | - M Wang
- Université de Paris, Laboratoire d'Electrochimie Moléculaire, CNRS, F-75006 Paris, France.
| | - J Bonin
- Université de Paris, Laboratoire d'Electrochimie Moléculaire, CNRS, F-75006 Paris, France.
| | - E Anxolabéhère-Mallart
- Université de Paris, Laboratoire d'Electrochimie Moléculaire, CNRS, F-75006 Paris, France.
| | - M Robert
- Université de Paris, Laboratoire d'Electrochimie Moléculaire, CNRS, F-75006 Paris, France. and Institut Universitaire de France (IUF), F-75005 Paris, France
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Johnson BA, Beiler AM, McCarthy BD, Ott S. Transport Phenomena: Challenges and Opportunities for Molecular Catalysis in Metal-Organic Frameworks. J Am Chem Soc 2020; 142:11941-11956. [PMID: 32516534 PMCID: PMC7366383 DOI: 10.1021/jacs.0c02899] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Indexed: 12/17/2022]
Abstract
Metal-organic frameworks (MOFs) are appealing heterogeneous support matrices that can stabilize molecular catalysts for the electrochemical conversion of small molecules. However, moving from a homogeneous environment to a porous film necessitates the transport of both charge and substrate to the catalytic sites in an efficient manner. This presents a significant challenge in the application of such materials at scale, since these two transport phenomena (charge and mass transport) would need to operate faster than the intrinsic catalytic rate in order for the system to function efficiently. Thus, understanding the fundamental kinetics of MOF-based molecular catalysis of electrochemical reactions is of crucial importance. In this Perspective, we quantitatively dissect the interplay between the two transport phenomena and the catalytic reaction rate by applying models from closely related fields to MOF-based catalysis. The identification of the limiting process provides opportunities for optimization that are uniquely suited to MOFs due to their tunable molecular structure. This will help guide the rational design of efficient and high-performing catalytic MOF films with incorporated molecular catalyst for electrochemical energy conversion.
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Affiliation(s)
- Ben A. Johnson
- Department of Chemistry −
Ångström Laboratory, Uppsala
University, Box 523, 751 20 Uppsala, Sweden
| | - Anna M. Beiler
- Department of Chemistry −
Ångström Laboratory, Uppsala
University, Box 523, 751 20 Uppsala, Sweden
| | - Brian D. McCarthy
- Department of Chemistry −
Ångström Laboratory, Uppsala
University, Box 523, 751 20 Uppsala, Sweden
| | - Sascha Ott
- Department of Chemistry −
Ångström Laboratory, Uppsala
University, Box 523, 751 20 Uppsala, Sweden
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9
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Li H, Münchberg U, Oughli AA, Buesen D, Lubitz W, Freier E, Plumeré N. Suppressing hydrogen peroxide generation to achieve oxygen-insensitivity of a [NiFe] hydrogenase in redox active films. Nat Commun 2020; 11:920. [PMID: 32060304 PMCID: PMC7021901 DOI: 10.1038/s41467-020-14673-7] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Accepted: 01/28/2020] [Indexed: 12/11/2022] Open
Abstract
Redox-active films were proposed as protective matrices for preventing oxidative deactivation of oxygen-sensitive catalysts such as hydrogenases for their use in fuel cells. However, the theoretical models predict quasi-infinite protection from oxygen and the aerobic half-life for hydrogenase-catalyzed hydrogen oxidation within redox films lasts only about a day. Here, we employ operando confocal microscopy to elucidate the deactivation processes. The hydrogen peroxide generated from incomplete reduction of oxygen induces the decomposition of the redox matrix rather than deactivation of the biocatalyst. We show that efficient dismutation of hydrogen peroxide by iodide extends the aerobic half-life of the catalytic film containing an oxygen-sensitive [NiFe] hydrogenase to over one week, approaching the experimental anaerobic half-life. Altogether, our data support the theory that redox films make the hydrogenases immune against the direct deactivation by oxygen and highlight the importance of suppressing hydrogen peroxide production in order to reach complete protection from oxidative stress.
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Affiliation(s)
- Huaiguang Li
- Center for Electrochemical Sciences, Ruhr-Universität Bochum, Bochum, Germany
| | - Ute Münchberg
- Leibniz-Institut für Analytische Wissenschaften - ISAS - e.V, 44227, Dortmund, Germany
| | - Alaa A Oughli
- Center for Electrochemical Sciences, Ruhr-Universität Bochum, Bochum, Germany
| | - Darren Buesen
- Center for Electrochemical Sciences, Ruhr-Universität Bochum, Bochum, Germany
| | - Wolfgang Lubitz
- Max-Planck-Institut für Chemische Energiekonversion, Stiftstrasse 34-36, 45470, Mülheim an der Ruhr, Germany
| | - Erik Freier
- Leibniz-Institut für Analytische Wissenschaften - ISAS - e.V, 44227, Dortmund, Germany
| | - Nicolas Plumeré
- Center for Electrochemical Sciences, Ruhr-Universität Bochum, Bochum, Germany.
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10
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McCarthy BD, Beiler AM, Johnson BA, Liseev T, Castner AT, Ott S. Analysis of Electrocatalytic Metal-Organic Frameworks. Coord Chem Rev 2019; 406. [PMID: 32499663 DOI: 10.1016/j.ccr.2019.213137] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The electrochemical analysis of molecular catalysts for the conversion of bulk feedstocks into energy-rich clean fuels has seen dramatic advances in the last decade. More recently, increased attention has focused on the characterization of metal-organic frameworks (MOFs) containing well-defined redox and catalytically active sites, with the overall goal to develop structurally stable materials that are industrially relevant for large-scale solar fuel syntheses. Successful electrochemical analysis of such materials draws heavily on well-established homogeneous techniques, yet the nature of solid materials presents additional challenges. In this tutorial-style review, we cover the basics of electrochemical analysis of electroactive MOFs, including considerations of bulk stability, methods of attaching MOFs to electrodes, interpreting fundamental electrochemical data, and finally electrocatalytic kinetic characterization. We conclude with a perspective of some of the prospects and challenges in the field of electrocatalytic MOFs.
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Affiliation(s)
- Brian D McCarthy
- Department of Chemistry, Ångström Laboratory, Uppsala University, Box 523, 75120 Uppsala, Sweden
| | - Anna M Beiler
- Department of Chemistry, Ångström Laboratory, Uppsala University, Box 523, 75120 Uppsala, Sweden
| | - Ben A Johnson
- Department of Chemistry, Ångström Laboratory, Uppsala University, Box 523, 75120 Uppsala, Sweden
| | - Timofey Liseev
- Department of Chemistry, Ångström Laboratory, Uppsala University, Box 523, 75120 Uppsala, Sweden
| | - Ashleigh T Castner
- Department of Chemistry, Ångström Laboratory, Uppsala University, Box 523, 75120 Uppsala, Sweden
| | - Sascha Ott
- Department of Chemistry, Ångström Laboratory, Uppsala University, Box 523, 75120 Uppsala, Sweden
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11
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Johnson BA, Bhunia A, Fei H, Cohen SM, Ott S. Development of a UiO-Type Thin Film Electrocatalysis Platform with Redox-Active Linkers. J Am Chem Soc 2018; 140:2985-2994. [PMID: 29421875 PMCID: PMC6067658 DOI: 10.1021/jacs.7b13077] [Citation(s) in RCA: 87] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Metal-organic frameworks (MOFs) as electrocatalysis scaffolds are appealing due to the large concentration of catalytic units that can be assembled in three dimensions. To harness the full potential of these materials, charge transport to the redox catalysts within the MOF has to be ensured. Herein, we report the first electroactive MOF with the UiO/PIZOF topology (Zr(dcphOH-NDI)), i.e., one of the most widely used MOFs for catalyst incorporation, by using redox-active naphthalene diimide-based linkers (dcphOH-NDI). Hydroxyl groups were included on the dcphOH-NDI linker to facilitate proton transport through the material. Potentiometric titrations of Zr(dcphOH-NDI) show the proton-responsive behavior via the -OH groups on the linkers and the bridging Zr-μ3-OH of the secondary building units with pKa values of 6.10 and 3.45, respectively. When grown directly onto transparent conductive fluorine-doped tin oxide (FTO), 1 μm thin films of Zr(dcphOH-NDI)@FTO could be achieved. Zr(dcphOH-NDI)@FTO displays reversible electrochromic behavior as a result of the sequential one-electron reductions of the redox-active NDI linkers. Importantly, 97% of the NDI sites are electrochemically active at applied potentials. Charge propagation through the thin film proceeds through a linker-to-linker hopping mechanism that is charge-balanced by electrolyte transport, giving rise to cyclic voltammograms of the thin films that show characteristics of a diffusion-controlled process. The equivalent diffusion coefficient, De, that contains contributions from both phenomena was measured directly by UV/vis spectroelectrochemistry. Using KPF6 as electrolyte, De was determined to be De(KPF6) = (5.4 ± 1.1) × 10-11 cm2 s-1, while an increase in countercation size to n-Bu4N+ led to a significant decrease of De by about 1 order of magnitude (De(n-Bu4NPF6) = (4.0 ± 2.5) × 10-12 cm2 s-1).
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Affiliation(s)
- Ben A. Johnson
- Department of Chemistry Ångström Laboratory, Uppsala University Box 523, 75120 Uppsala (Sweden)
| | - Asamanjoy Bhunia
- Department of Chemistry Ångström Laboratory, Uppsala University Box 523, 75120 Uppsala (Sweden)
| | - Honghan Fei
- Department of Chemistry and Biochemistry, University of California, La Jolla, San Diego, CA, 92023-0358, USA
| | - Seth M. Cohen
- Department of Chemistry and Biochemistry, University of California, La Jolla, San Diego, CA, 92023-0358, USA
| | - Sascha Ott
- Department of Chemistry Ångström Laboratory, Uppsala University Box 523, 75120 Uppsala (Sweden)
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12
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Costentin C, Savéant JM. Heterogeneous Molecular Catalysis of Electrochemical Reactions: Volcano Plots and Catalytic Tafel Plots. ACS APPLIED MATERIALS & INTERFACES 2017; 9:19894-19899. [PMID: 28530798 DOI: 10.1021/acsami.7b04349] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We analyze here, in the framework of heterogeneous molecular catalysis, the reasons for the occurrence or nonoccurrence of volcanoes upon plotting the kinetics of the catalytic reaction versus the stabilization free energy of the primary intermediate of the catalytic process. As in the case of homogeneous molecular catalysis or catalysis by surface-active metallic sites, a strong motivation of such studies relates to modern energy challenges, particularly those involving small molecules, such as water, hydrogen, oxygen, proton, and carbon dioxide. This motivation is particularly pertinent for what concerns heterogeneous molecular catalysis, since it is commonly preferred to homogeneous molecular catalysis by the same molecules if only for chemical separation purposes and electrolytic cell architecture. As with the two other catalysis modes, the main drawback of the volcano plot approach is the basic assumption that the kinetic responses depend on a single descriptor, viz., the stabilization free energy of the primary intermediate. More comprehensive approaches, investigating the responses to the maximal number of experimental factors, and conveniently expressed as catalytic Tafel plots, should clearly be preferred. This is more so in the case of heterogeneous molecular catalysis in that additional transport factors in the supporting film may additionally affect the current-potential responses. This is attested by the noteworthy presence of maxima in catalytic Tafel plots as well as their dependence upon the cyclic voltammetric scan rate.
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Affiliation(s)
- Cyrille Costentin
- Université Paris Diderot, Sorbonne Paris Cité, Laboratoire d'Electrochimie Moléculaire, Unité Mixte de Recherche Université-CNRS 7591, Bâtiment Lavoisier, 15 Rue Jean de Baïf, 75205 Cedex 13, Paris, France
| | - Jean-Michel Savéant
- Université Paris Diderot, Sorbonne Paris Cité, Laboratoire d'Electrochimie Moléculaire, Unité Mixte de Recherche Université-CNRS 7591, Bâtiment Lavoisier, 15 Rue Jean de Baïf, 75205 Cedex 13, Paris, France
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Lee KJ, Elgrishi N, Kandemir B, Dempsey JL. Electrochemical and spectroscopic methods for evaluating molecular electrocatalysts. Nat Rev Chem 2017. [DOI: 10.1038/s41570-017-0039] [Citation(s) in RCA: 123] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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First Air Liquide Awards on Essential Small Molecules: K. Sivula, S.Kitagawa, R. Matsuda, J.-M. Savéant, M. Robert, and C. Costentin / Wolf Prize in Chemistry: R. G. Bergman / Swiss Chemical Society Awards: K. Sivula, C. Sparr, and R. R. Knowles / Knighth. Angew Chem Int Ed Engl 2017; 56:2539-2540. [DOI: 10.1002/anie.201700844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Erste Preise von Air Liquide für essenzielle kleine Moleküle: K. Sivula, S.Kitagawa, R. Matsuda, J.-M. Savéant, M. Robert und C. Costentin / Wolf-Preis für Chemie: R. G. Bergman / Preise der Schweizerischen Chemischen Gesellschaft: K. Sivula, C. Sparr und. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201700844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Affiliation(s)
- Jean-Michel Saveant
- Laboratoire d'Electrochimie Moléculaire, UMR 7591 CNRS; Université Paris Diderot, Sorbonne Paris Cité; 15 rue Jean-Antoine de Baïf 75205 Paris Cedex 13t France
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Gloaguen F. Electrochemistry of Simple Organometallic Models of Iron-Iron Hydrogenases in Organic Solvent and Water. Inorg Chem 2015; 55:390-8. [PMID: 26641526 DOI: 10.1021/acs.inorgchem.5b02245] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Synthetic models of the active site of iron-iron hydrogenases are currently the subjects of numerous studies aimed at developing H2-production catalysts based on cheap and abundant materials. In this context, the present report offers an electrochemist's view of the catalysis of proton reduction by simple binuclear iron(I) thiolate complexes. Although these complexes probably do not follow a biocatalytic pathway, we analyze and discuss the interplay between the reduction potential and basicity and how these antagonist properties impact the mechanisms of proton-coupled electron transfer to the metal centers. This question is central to any consideration of the activity at the molecular level of hydrogenases and related enzymes. In a second part, special attention is paid to iron thiolate complexes holding rigid and unsaturated bridging ligands. The complexes that enjoy mild reduction potentials and stabilized reduced forms are promising iron-based catalysts for the photodriven evolution of H2 in organic solvents and, more importantly, in water.
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Affiliation(s)
- Frederic Gloaguen
- UMR 6521, CNRS, Université de Bretagne Occidentale, CS 93837 , 29238 Brest, France
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