1
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Bieniasz LK. While educating electrochemists, do not forget we live in a computer era. J Solid State Electrochem 2023. [DOI: 10.1007/s10008-023-05457-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/19/2023]
Abstract
AbstractThe appearance of computers has led to considerable changes in research practices of natural sciences, including electrochemistry. The current status of the computerization in electrochemistry is briefly discussed, with the conclusion that the progress in this area is not as fast as in other natural science disciplines. Some postulates are formulated, referring to the education of young generations of electrochemists, that might bring improvements.
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2
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Bieniasz L. Efficient and highly accurate calculation of chronoamperometric currents for the CrevErev and ErevCrev reaction mechanisms at planar, spherical, and cylindrical electrodes. Electrochim Acta 2023. [DOI: 10.1016/j.electacta.2023.141894] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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3
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Snitkoff-Sol RZ, Elbaz L. Assessing and measuring the active site density of PGM-free ORR catalysts. J Solid State Electrochem 2022. [DOI: 10.1007/s10008-022-05236-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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4
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Bieniasz LK, Vynnycky M, McKee S. Integral equation-based simulation of transient experiments for an EC2 mechanism: Beyond the steady state simplification. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2022.140896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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5
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Hodgetts RY, Du HL, Nguyen TD, MacFarlane D, Simonov AN. Electrocatalytic Oxidation of Hydrogen as an Anode Reaction for the Li-Mediated N 2 Reduction to Ammonia. ACS Catal 2022. [DOI: 10.1021/acscatal.2c00538] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Rebecca Y. Hodgetts
- School of Chemistry and the ARC Centre of Excellence for Electromaterials Science, Monash University, Clayton, Victoria 3800, Australia
| | - Hoang-Long Du
- School of Chemistry and the ARC Centre of Excellence for Electromaterials Science, Monash University, Clayton, Victoria 3800, Australia
| | - Tam D. Nguyen
- School of Chemistry and the ARC Centre of Excellence for Electromaterials Science, Monash University, Clayton, Victoria 3800, Australia
| | - Douglas MacFarlane
- School of Chemistry and the ARC Centre of Excellence for Electromaterials Science, Monash University, Clayton, Victoria 3800, Australia
| | - Alexandr N. Simonov
- School of Chemistry and the ARC Centre of Excellence for Electromaterials Science, Monash University, Clayton, Victoria 3800, Australia
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6
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Quantifying the electrochemical active site density of precious metal-free catalysts in situ in fuel cells. Nat Catal 2022. [DOI: 10.1038/s41929-022-00748-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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7
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Guo SX, Bentley CL, Kang M, Bond AM, Unwin PR, Zhang J. Advanced Spatiotemporal Voltammetric Techniques for Kinetic Analysis and Active Site Determination in the Electrochemical Reduction of CO 2. Acc Chem Res 2022; 55:241-251. [PMID: 35020363 DOI: 10.1021/acs.accounts.1c00617] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
ConspectusElectrochemical reduction of the greenhouse gas CO2 offers prospects for the sustainable generation of fuels and industrially useful chemicals when powered by renewable electricity. However, this electrochemical process requires the use of highly stable, selective, and active catalysts. The development of such catalysts should be based on a detailed kinetic and mechanistic understanding of the electrochemical CO2 reduction reaction (eCO2RR), ideally through the resolution of active catalytic sites in both time (i.e., temporally) and space (i.e., spatially). In this Account, we highlight two advanced spatiotemporal voltammetric techniques for electrocatalytic studies and describe the considerable insights they provide on the eCO2RR. First, Fourier transformed large-amplitude alternating current voltammetry (FT ac voltammetry), as applied by the Monash Electrochemistry Group, enables the resolution of rapid underlying electron-transfer processes in complex reactions, free from competing processes, such as the background double-layer charging current, slow catalytic reactions, and solvent/electrolyte electrolysis, which often mask conventional voltammetric measurements of the eCO2RR. Crucially, FT ac voltammetry allows details of the catalytically active sites or the rate-determining step to be revealed under catalytic turnover conditions. This is well illustrated in investigations of the eCO2RR catalyzed by Bi where formate is the main product. Second, developments in scanning electrochemical cell microscopy (SECCM) by the Warwick Electrochemistry and Interfaces Group provide powerful methods for obtaining high-resolution activity maps and potentiodynamic movies of the heterogeneous surface of a catalyst. For example, by coupling SECCM data with colocated microscopy from electron backscatter diffraction (EBSD) or atomic force microscopy, it is possible to develop compelling correlations of (precatalyst) structure-activity at the nanoscale level. This correlative electrochemical multimicroscopy strategy allows the catalytically more active region of a catalyst, such as the edge plane of two-dimensional materials and the grain boundaries between facets in a polycrystalline metal, to be highlighted. The attributes of SECCM-EBSD are well-illustrated by detailed studies of the eCO2RR on polycrystalline gold, where carbon monoxide is the main product. Comparing SECCM maps and movies with EBSD images of the same region reveals unambiguously that the eCO2RR is enhanced at surface-terminating dislocations, which accumulate at grain boundaries and slip bands. Both FT ac voltammetry and SECCM techniques greatly enhance our understanding of the eCO2RR, significantly boosting the electrochemical toolbox and the information available for the development and testing of theoretical models and rational catalyst design. In the future, it may be possible to further enhance insights provided by both techniques through their integration with in situ and in operando spectroscopy and microscopy methods.
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Affiliation(s)
| | | | - Minkyung Kang
- Institute for Frontier Materials, Deakin University, Burwood, Victoria 3125, Australia
| | | | - Patrick R. Unwin
- Department of Chemistry, University of Warwick, Coventry CV4 7AL, U.K
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8
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Gundry L, Kennedy G, Keith J, Robinson M, Gavaghan D, Bond AM, Zhang J. A Comparison of Bayesian Inference Strategies for Parameterisation of Large Amplitude AC Voltammetry Derived from Total Current and Fourier Transformed Versions. ChemElectroChem 2021. [DOI: 10.1002/celc.202100391] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Luke Gundry
- School of Chemistry Monash University Clayton Vic. 3800 Australia
| | - Gareth Kennedy
- School of Chemistry Monash University Clayton Vic. 3800 Australia
| | - Jonathan Keith
- School of Mathematics Monash University Clayton Vic. 3800 Australia
| | - Martin Robinson
- Department of Computer Science University of Oxford, Wolfson Building Parks Road Oxford OX1 3QD United Kingdom
| | - David Gavaghan
- Department of Computer Science University of Oxford, Wolfson Building Parks Road Oxford OX1 3QD United Kingdom
| | - Alan M. Bond
- School of Chemistry Monash University Clayton Vic. 3800 Australia
| | - Jie Zhang
- School of Chemistry Monash University Clayton Vic. 3800 Australia
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10
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Gundry L, Guo SX, Kennedy G, Keith J, Robinson M, Gavaghan D, Bond AM, Zhang J. Recent advances and future perspectives for automated parameterisation, Bayesian inference and machine learning in voltammetry. Chem Commun (Camb) 2021; 57:1855-1870. [PMID: 33529293 DOI: 10.1039/d0cc07549c] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Advanced data analysis tools such as mathematical optimisation, Bayesian inference and machine learning have the capability to revolutionise the field of quantitative voltammetry. Nowadays such approaches can be implemented routinely with widely available, user-friendly modern computing languages, algorithms and high speed computing to provide accurate and robust methods for quantitative comparison of experimental data with extensive simulated data sets derived from models proposed to describe complex electrochemical reactions. While the methodology is generic to all forms of dynamic electrochemistry, including the widely used direct current cyclic voltammetry, this review highlights advances achievable in the parameterisation of large amplitude alternating current voltammetry. One significant advantage this technique offers in terms of data analysis is that Fourier transformation provides access to the higher order harmonics that are almost devoid of background current. Perspectives on the technical advances needed to develop intelligent data analysis strategies and make them generally available to users of voltammetry are provided.
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Affiliation(s)
- Luke Gundry
- School of Chemistry, Monash University, Clayton, Vic. 3800, Australia.
| | - Si-Xuan Guo
- School of Chemistry, Monash University, Clayton, Vic. 3800, Australia.
| | - Gareth Kennedy
- School of Chemistry, Monash University, Clayton, Vic. 3800, Australia.
| | - Jonathan Keith
- School of Mathematics, Monash University, Clayton, Vic. 3800, Australia
| | - Martin Robinson
- Department of Computer Science, University of Oxford, Wolfson Building, Parks Road, Oxford, OX1 3QD, UK
| | - David Gavaghan
- Department of Computer Science, University of Oxford, Wolfson Building, Parks Road, Oxford, OX1 3QD, UK
| | - Alan M Bond
- School of Chemistry, Monash University, Clayton, Vic. 3800, Australia.
| | - Jie Zhang
- School of Chemistry, Monash University, Clayton, Vic. 3800, Australia.
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11
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Lloyd-Laney HO, Yates NDJ, Robinson MJ, Hewson AR, Firth JD, Elton DM, Zhang J, Bond AM, Parkin A, Gavaghan DJ. Using Purely Sinusoidal Voltammetry for Rapid Inference of Surface-Confined Electrochemical Reaction Parameters. Anal Chem 2021; 93:2062-2071. [PMID: 33417431 DOI: 10.1021/acs.analchem.0c03774] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Alternating current (AC) voltammetric techniques are experimentally powerful as they enable Faradaic current to be isolated from non-Faradaic contributions. Finding the best global fit between experimental voltammetric data and simulations based on reaction models requires searching a substantial parameter space at high resolution. In this paper, we estimate parameters from purely sinusoidal voltammetry (PSV) experiments, investigating the redox reactions of a surface-confined ferrocene derivative. The advantage of PSV is that a complete experiment can be simulated relatively rapidly, compared to other AC voltammetric techniques. In one example involving thermodynamic dispersion, a PSV parameter inference effort requiring 7,500,000 simulations was completed in 7 h, whereas the same process for our previously used technique, ramped Fourier transform AC voltammetry (ramped FTACV), would have taken 4 days. Using both synthetic and experimental data with a surface confined diazonium substituted ferrocene derivative, it is shown that the PSV technique can be used to recover the key chemical and physical parameters. By applying techniques from Bayesian inference and Markov chain Monte Carlo methods, the confidence, distribution, and degree of correlation of the recovered parameters was visualized and quantified.
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Affiliation(s)
- Henry O Lloyd-Laney
- Department of Computer Science, University of Oxford, Wolfson Building, Parks Road, Oxford, OX1 3QD United Kingdom
| | - Nicholas D J Yates
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, United Kingdom
| | - Martin J Robinson
- Department of Computer Science, University of Oxford, Wolfson Building, Parks Road, Oxford, OX1 3QD United Kingdom
| | - Alice R Hewson
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, United Kingdom
| | - Jack D Firth
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, United Kingdom
| | - Darrell M Elton
- School of Engineering and Mathematical Sciences, La Trobe University, Bundoora, Victoria 3086, Australia
| | - Jie Zhang
- School of Chemistry and the ARC Centre of Excellence for Electromaterials Science, Monash University, Clayton, Victoria, 3800 Australia
| | - Alan M Bond
- School of Chemistry and the ARC Centre of Excellence for Electromaterials Science, Monash University, Clayton, Victoria, 3800 Australia
| | - Alison Parkin
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, United Kingdom
| | - David J Gavaghan
- Department of Computer Science, University of Oxford, Wolfson Building, Parks Road, Oxford, OX1 3QD United Kingdom
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12
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Dawkins MJC, Simonov AN, Jones C. 2,6-Diiminopyridine complexes of group 2 metals: synthesis, characterisation and redox behaviour. Dalton Trans 2020; 49:6627-6634. [PMID: 32363367 DOI: 10.1039/d0dt01278e] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Treatment of the 2,6-diiminopyridine, NC5H3{C(Ph)[double bond, length as m-dash]N(Dip)}2-2,6 (PhDimpy, Dip = 2,6-diisopropylphenyl) with [MgI2(OEt2)2] gives the adduct complex [(PhDimpy)MgI2] in which the PhDimpy ligand is neutral. This complex can be singly reduced by KC8 or a magnesium(i) complex to give [(PhDimpy˙)MgI], in which PhDimpy acts as a radical anion. Double reduction of [(PhDimpy)MgI2] in diethyl ether yields [(PhDimpy)Mg(OEt2)], in which the magnesium centre is ligated by dianionic [PhDimpy]2-. [(PhDimpy)Mg(OEt2)] can alternatively be prepared by the simple, high yielding reaction between PhDimpy and activated magnesium. A comproportionation reaction occurs between [(PhDimpy)MgI2] and [(PhDimpy)Mg(OEt2)], leading to the quantitative formation of [(PhDimpy˙)MgI]. The heavier group 2 metal dimeric complexes [{(PhDimpy)M}2] (M = Ca, Sr, Ba) can be similarly accessed by reaction of PhDimpy with the activated metal, or by KC8 reduction of in situ generated [(PhDimpy)MI2] (M = Ca, Sr). All prepared complexes have been characterised by X-ray crystallography and NMR spectroscopy. Electrochemical investigations into the complexes incorporating [PhDimpy]2- ligands reveal that they can undergo quasi-reversible 1- and 2-electron reduction processes, quasi-reversible 1-electron oxidations, and largely irreversible 2-electron oxidation events. These studies suggest that the compounds hold promise as soluble reducing agents in organic and inorganic synthesis.
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Affiliation(s)
| | - Alexandr N Simonov
- School of Chemistry, PO Box 23, Monash University, VIC 3800, Australia. and ARC Centre for Electromaterials Science, Monash University, VIC 3800, Australia
| | - Cameron Jones
- School of Chemistry, PO Box 23, Monash University, VIC 3800, Australia.
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13
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MacFarlane DR, Choi J, Suryanto BHR, Jalili R, Chatti M, Azofra LM, Simonov AN. Liquefied Sunshine: Transforming Renewables into Fertilizers and Energy Carriers with Electromaterials. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e1904804. [PMID: 31762106 DOI: 10.1002/adma.201904804] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Revised: 09/30/2019] [Indexed: 06/10/2023]
Abstract
It has become apparent that renewable energy sources are plentiful in many, often remote, parts of the world, such that storing and transporting that energy has become the key challenge. For long-distance transportation by pipeline and bulk tanker, a liquid form of energy carrier is ideal, focusing attention on liquid hydrogen and ammonia. Development of high-activity and selectivity electrocatalyst materials to produce these energy carriers by reductive electrochemistry has therefore become an important area of research. Here, recent developments and challenges in the field of electrocatalytic materials for these processes are discussed, including the hydrogen evolution reaction (HER), the oxygen evolution reaction (OER), and the nitrogen reduction reaction (NRR). Some of the mis-steps currently plaguing the nitrogen reduction to ammonia field are highlighted. The rapidly growing roles that in situ/operando and quantum chemical studies can play in new electromaterials discovery are also surveyed.
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Affiliation(s)
- Douglas R MacFarlane
- ARC Centre of Excellence for Electromaterials Science, School of Chemistry, Monash University, Clayton, VIC, 3800, Australia
| | - Jaecheol Choi
- ARC Centre of Excellence for Electromaterials Science, School of Chemistry, Monash University, Clayton, VIC, 3800, Australia
| | - Bryan H R Suryanto
- ARC Centre of Excellence for Electromaterials Science, School of Chemistry, Monash University, Clayton, VIC, 3800, Australia
| | - Rouhollah Jalili
- School of Chemical Engineering, University of New South Wales (UNSW), Sydney, NSW, 2052, Australia
| | - Manjunath Chatti
- ARC Centre of Excellence for Electromaterials Science, School of Chemistry, Monash University, Clayton, VIC, 3800, Australia
| | - Luis Miguel Azofra
- Departamento de Química, Universidad de Las Palmas de Gran Canaria (ULPGC), Campus de Tafira, 35017, Las Palmas de Gran Canaria, Spain
- CIDIA-FEAM (Unidad Asociada al Consejo Superior de Investigaciones Científicas, CSIC, avalada por el Instituto de Ciencia de Materiales de Sevilla, Universidad de Sevilla), Instituto de Estudios Ambientales y Recursos Naturales (i-UNAT), Universidad de Las Palmas de Gran Canaria (ULPGC), Campus de Tafira, 35017, Las Palmas de Gran Canaria, Spain
| | - Alexandr N Simonov
- ARC Centre of Excellence for Electromaterials Science, School of Chemistry, Monash University, Clayton, VIC, 3800, Australia
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14
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Guin SK, Ambolikar AS, Das S, Poswal AK. Advantage of Fractional Calculus Based Hybrid‐Theoretical‐Computational‐Experimental Approach for Alternating Current Voltammetry. ELECTROANAL 2020. [DOI: 10.1002/elan.201900552] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Saurav K. Guin
- Fuel Chemistry DivisionBhabha Atomic Research Centre, Trombay Mumbai 400085 India
| | - Arvind S. Ambolikar
- Fuel Chemistry DivisionBhabha Atomic Research Centre, Trombay Mumbai 400085 India
- Homi Bhabha National InstituteAnushakti Nagar Mumbai 400094 India
| | - Shantanu Das
- Reactor Contol System Design SectionBhabha Atomic Research Centre, Trombay Mumbai 400085 India
| | - Ashwini K. Poswal
- Atomic & Molecular Physics DivisionBhabha Atomic Research Centre, Trombay Mumbai 400085 India
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15
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Caldwell AH, Allanore A. Alternating current voltammetry of electrode reactions with constant surface activity: Application to electrolysis of molten electrolytes. J Electroanal Chem (Lausanne) 2020. [DOI: 10.1016/j.jelechem.2019.113709] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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16
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Robinson M, Ounnunkad K, Zhang J, Gavaghan D, Bond AM. Models and Their Limitations in the Voltammmetric Parameterization of the Six‐Electron Surface‐Confined Reduction of [PMo
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at Glassy Carbon and Boron‐Doped Diamond Electrodes. ChemElectroChem 2019. [DOI: 10.1002/celc.201901415] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Martin Robinson
- Department of Computer Science University of Oxford Wolfson Building Parks Road Oxford OX1 3QD United Kingdom
| | - Kontad Ounnunkad
- School of Chemistry Monash University, Clayton Vic. 3800 Australia
- Department of Chemistry Faculty of Science Chiang Mai University Chiang Mai 50200 Thailand
| | - Jie Zhang
- School of Chemistry Monash University, Clayton Vic. 3800 Australia
| | - David Gavaghan
- Department of Computer Science University of Oxford Wolfson Building Parks Road Oxford OX1 3QD United Kingdom
| | - Alan M. Bond
- School of Chemistry Monash University, Clayton Vic. 3800 Australia
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17
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Kennedy GF, Zhang J, Bond AM. Automatically Identifying Electrode Reaction Mechanisms Using Deep Neural Networks. Anal Chem 2019; 91:12220-12227. [PMID: 31466438 DOI: 10.1021/acs.analchem.9b01891] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
At present, electrochemical mechanisms are most commonly identified subjectively based on the experience of the researcher. This subjectivity is reflected in bias to particular mechanisms as well as lack of quantifiable confidence in the chosen mechanism compared to potential alternative mechanisms. In this paper we demonstrate that a deep neural network trained to recognize dc cyclic voltammograms for three commonly encountered mechanisms provides correct classifications within 5 ms without the problem of subjectivity. To mimic experimental data, the impact of noise, uncompensated resistance, and dependence on scan rate, factors that are relevant to practical studies, has also been investigated. Outcomes with two experimental data sets are also presented.
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Affiliation(s)
- Gareth F Kennedy
- School of Chemistry , Monash University , Clayton , Victoria 3800 , Australia
| | - Jie Zhang
- School of Chemistry , Monash University , Clayton , Victoria 3800 , Australia.,ARC Centre of Excellence for Electromaterials Science, School of Chemistry , Monash University , Clayton , Victoria 3800 , Australia
| | - Alan M Bond
- School of Chemistry , Monash University , Clayton , Victoria 3800 , Australia.,ARC Centre of Excellence for Electromaterials Science, School of Chemistry , Monash University , Clayton , Victoria 3800 , Australia
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18
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Li J, Kennedy GF, Gundry L, Bond AM, Zhang J. Application of Bayesian Inference in Fourier-Transformed Alternating Current Voltammetry for Electrode Kinetic Mechanism Distinction. Anal Chem 2019; 91:5303-5309. [DOI: 10.1021/acs.analchem.9b00129] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jiezhen Li
- School of Chemistry, Monash University, Victoria 3800, Australia
| | | | - Luke Gundry
- School of Chemistry, Monash University, Victoria 3800, Australia
| | - Alan M. Bond
- School of Chemistry, Monash University, Victoria 3800, Australia
- ARC Centre of Excellence for Electromaterials Science, School of Chemistry, Monash University, Victoria 3800, Australia
| | - Jie Zhang
- School of Chemistry, Monash University, Victoria 3800, Australia
- ARC Centre of Excellence for Electromaterials Science, School of Chemistry, Monash University, Victoria 3800, Australia
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19
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Amin HM, Uchida Y, Kätelhön E, Compton RG. Semi-circular potential sweep voltammetry: Experimental verification and determination of the formal potential of a reversible redox couple. J Electroanal Chem (Lausanne) 2019. [DOI: 10.1016/j.jelechem.2019.01.058] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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20
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Zheng F, Lawrence NS, Hartshorne RS, Fisher AC. Voltammetric and electrosynthetic triggered gel formation. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2018.11.146] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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21
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Zanello P. Structure and electrochemistry of proteins harboring iron-sulfur clusters of different nuclearities. Part IV. Canonical, non-canonical and hybrid iron-sulfur proteins. J Struct Biol 2019; 205:103-120. [PMID: 30677521 DOI: 10.1016/j.jsb.2019.01.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Revised: 01/11/2019] [Accepted: 01/11/2019] [Indexed: 12/26/2022]
Abstract
A plethora of proteins are able to express iron-sulfur clusters, but have a clear picture of the different types of proteins and the different iron-sulfur clusters they harbor it is not easy. In the last five years we have reviewed structure/electrochemistry of metalloproteins expressing: (i) single types of iron-sulfur clusters (namely: {Fe(Cys)4}, {[Fe2S2](Cys)4}, {[Fe2S2](Cys)3(X)} (X = Asp, Arg, His), {[Fe2S2](Cys)2(His)2}, {[Fe3S4](Cys)3}, {[Fe4S4](Cys)4} and {[Fe4S4](Cys)3(nonthiolate ligand)} cores); (ii) metalloproteins harboring iron-sulfur centres of different nuclearities (namely: [4Fe-4S] and [2Fe-2S], [4Fe-4S] and [3Fe-4S], and [4Fe-4S], [3Fe-4S] and [2Fe-2S] clusters. Our target is now to review structure and electrochemistry of proteins harboring canonical, non-canonical and hybrid iron-sulfur proteins.
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Affiliation(s)
- Piero Zanello
- Dipartimento di Biotecnologie, Chimica e Farmacia dell'Università di Siena, Via A. De Gasperi 2, 53100 Siena, Italy
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Chen J, Zheng F, Zhang SJ, Fisher A, Zhou Y, Wang Z, Li Y, Xu BB, Li JT, Sun SG. Interfacial Interaction between FeOOH and Ni–Fe LDH to Modulate the Local Electronic Structure for Enhanced OER Electrocatalysis. ACS Catal 2018. [DOI: 10.1021/acscatal.8b03489] [Citation(s) in RCA: 279] [Impact Index Per Article: 46.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Jiande Chen
- College of Energy, Xiamen University, Xiamen 361005, China
| | - Feng Zheng
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge CB30AS, United Kingdom
| | | | - Adrian Fisher
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge CB30AS, United Kingdom
| | - Yao Zhou
- College of Energy, Xiamen University, Xiamen 361005, China
| | - Zeyu Wang
- Pen-tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen 361005, China
| | - Yuyang Li
- College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Bin-Bin Xu
- College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Jun-Tao Li
- College of Energy, Xiamen University, Xiamen 361005, China
| | - Shi-Gang Sun
- College of Energy, Xiamen University, Xiamen 361005, China
- College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
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Robinson M, Ounnunkad K, Zhang J, Gavaghan D, Bond A. Integration of Heuristic and Automated Parametrization of Three Unresolved Two-Electron Surface-Confined Polyoxometalate Reduction Processes by AC Voltammetry. ChemElectroChem 2018. [DOI: 10.1002/celc.201800950] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Martin Robinson
- Department of Computer Science; University of Oxford; Wolfson Building Parks Road Oxford OX1 3QD United Kingdom
| | - Kontad Ounnunkad
- School of Chemistry; Monash University; Clayton, Vic. 3800 Australia
- Department of Chemistry Faculty of Science; Chiang Mai University; Chiang Mai 50200 Thailand
| | - Jie Zhang
- School of Chemistry; Monash University; Clayton, Vic. 3800 Australia
| | - David Gavaghan
- Department of Computer Science; University of Oxford; Wolfson Building Parks Road Oxford OX1 3QD United Kingdom
| | - Alan Bond
- School of Chemistry; Monash University; Clayton, Vic. 3800 Australia
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24
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Zhang Y, Zhang X, Ling Y, Li F, Bond AM, Zhang J. Controllable Synthesis of Few‐Layer Bismuth Subcarbonate by Electrochemical Exfoliation for Enhanced CO
2
Reduction Performance. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201807466] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Ying Zhang
- School of Chemistry Monash University Wellington Road Clayton 3800 VIC Australia
- ARC Centre of Excellence for Electromaterials Science Monash University Wellington Road Clayton 3800 VIC Australia
| | - Xiaolong Zhang
- School of Chemistry Monash University Wellington Road Clayton 3800 VIC Australia
| | - Yunzhi Ling
- Department of Chemical Engineering Monash University Wellington Road Clayton 3800 VIC Australia
| | - Fengwang Li
- School of Chemistry Monash University Wellington Road Clayton 3800 VIC Australia
- ARC Centre of Excellence for Electromaterials Science Monash University Wellington Road Clayton 3800 VIC Australia
| | - Alan M. Bond
- School of Chemistry Monash University Wellington Road Clayton 3800 VIC Australia
- ARC Centre of Excellence for Electromaterials Science Monash University Wellington Road Clayton 3800 VIC Australia
| | - Jie Zhang
- School of Chemistry Monash University Wellington Road Clayton 3800 VIC Australia
- ARC Centre of Excellence for Electromaterials Science Monash University Wellington Road Clayton 3800 VIC Australia
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25
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Zhang Y, Zhang X, Ling Y, Li F, Bond AM, Zhang J. Controllable Synthesis of Few‐Layer Bismuth Subcarbonate by Electrochemical Exfoliation for Enhanced CO
2
Reduction Performance. Angew Chem Int Ed Engl 2018; 57:13283-13287. [DOI: 10.1002/anie.201807466] [Citation(s) in RCA: 104] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Indexed: 01/15/2023]
Affiliation(s)
- Ying Zhang
- School of Chemistry Monash University Wellington Road Clayton 3800 VIC Australia
- ARC Centre of Excellence for Electromaterials Science Monash University Wellington Road Clayton 3800 VIC Australia
| | - Xiaolong Zhang
- School of Chemistry Monash University Wellington Road Clayton 3800 VIC Australia
| | - Yunzhi Ling
- Department of Chemical Engineering Monash University Wellington Road Clayton 3800 VIC Australia
| | - Fengwang Li
- School of Chemistry Monash University Wellington Road Clayton 3800 VIC Australia
- ARC Centre of Excellence for Electromaterials Science Monash University Wellington Road Clayton 3800 VIC Australia
| | - Alan M. Bond
- School of Chemistry Monash University Wellington Road Clayton 3800 VIC Australia
- ARC Centre of Excellence for Electromaterials Science Monash University Wellington Road Clayton 3800 VIC Australia
| | - Jie Zhang
- School of Chemistry Monash University Wellington Road Clayton 3800 VIC Australia
- ARC Centre of Excellence for Electromaterials Science Monash University Wellington Road Clayton 3800 VIC Australia
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26
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Li J, Bentley CL, Ueda T, Bond AM, Zhang J. Electrolyte cation dependence of the electron transfer kinetics associated with the [SVW11O40]3–/4– (VV/IV) and [SVW11O40]4–/5– (WVI/V) processes in propylene carbonate. J Electroanal Chem (Lausanne) 2018. [DOI: 10.1016/j.jelechem.2017.10.028] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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27
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Facile electrochemical co-deposition of metal (Cu, Pd, Pt, Rh) nanoparticles on reduced graphene oxide for electrocatalytic reduction of nitrate/nitrite. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2018.03.005] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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28
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Non-triangular potential sweep cyclic voltammetry of reversible electron transfer: Experiment meets theory. J Electroanal Chem (Lausanne) 2018. [DOI: 10.1016/j.jelechem.2018.03.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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29
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Gavaghan DJ, Cooper J, Daly AC, Gill C, Gillow K, Robinson M, Simonov AN, Zhang J, Bond AM. Use of Bayesian Inference for Parameter Recovery in DC and AC Voltammetry. ChemElectroChem 2017. [DOI: 10.1002/celc.201700678] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- David J. Gavaghan
- Department of Computer Science University of Oxford Wolfson Building, Parks Road Oxford OX1 3QD United Kingdom
| | - Jonathan Cooper
- Department of Computer Science University of Oxford Wolfson Building, Parks Road Oxford OX1 3QD United Kingdom
| | - Aidan C. Daly
- Department of Computer Science University of Oxford Wolfson Building, Parks Road Oxford OX1 3QD United Kingdom
| | - Christopher Gill
- Department of Statistics University of Oxford 24–29 St Giles' Oxford OX1 3LB United Kingdom
| | - Kathryn Gillow
- Mathematical Institute University of Oxford, Andrew Wiles Building Radcliffe Observatory Quarter Woodstock Road Oxford OX2 6GG United Kingdom
| | - Martin Robinson
- Department of Computer Science University of Oxford Wolfson Building, Parks Road Oxford OX1 3QD United Kingdom
| | - Alexandr N. Simonov
- School of Chemistry and the ARC Centre of Excellence for Electromaterials Science Monash University, Clayton Vic. 3800 Australia
| | - Jie Zhang
- School of Chemistry and the ARC Centre of Excellence for Electromaterials Science Monash University, Clayton Vic. 3800 Australia
| | - Alan M. Bond
- School of Chemistry and the ARC Centre of Excellence for Electromaterials Science Monash University, Clayton Vic. 3800 Australia
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30
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Song P, Ma H, Meng L, Wang Y, Nguyen HV, Lawrence NS, Fisher AC. Fourier transform large amplitude alternating current voltammetry investigations of the split wave phenomenon in electrocatalytic mechanisms. Phys Chem Chem Phys 2017; 19:24304-24315. [PMID: 28849830 DOI: 10.1039/c7cp03510a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Fourier transform large amplitude alternating current voltammetry (FTACV) studies are reported on an electrocatalytic (EC') mechanistic system which exhibits split wave behavior on both macro- and micro-size working electrodes. The electrochemical characteristics of the EC' mechanism were analysed using the fundamental to fourth harmonic components deduced by the Fourier transform algorithm. The effects of the sinusoidal frequencies of the applied potential, electrode geometry and substrate concentrations are investigated. The split wave phenomenon was observed and explored particularly.
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Affiliation(s)
- Peng Song
- Beijing Key Laboratory for Green Catalysis and Separation, Department of Chemistry and Chemical Engineering, Beijing University of Technology, Beijing 100124, China
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31
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Adamson H, Bond AM, Parkin A. Probing biological redox chemistry with large amplitude Fourier transformed ac voltammetry. Chem Commun (Camb) 2017; 53:9519-9533. [PMID: 28804798 PMCID: PMC5708363 DOI: 10.1039/c7cc03870d] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2017] [Accepted: 06/12/2017] [Indexed: 12/17/2022]
Abstract
Biological electron-exchange reactions are fundamental to life on earth. Redox reactions underpin respiration, photosynthesis, molecular biosynthesis, cell signalling and protein folding. Chemical, biomedical and future energy technology developments are also inspired by these natural electron transfer processes. Further developments in techniques and data analysis are required to gain a deeper understanding of the redox biochemistry processes that power Nature. This review outlines the new insights gained from developing Fourier transformed ac voltammetry as a tool for protein film electrochemistry.
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Affiliation(s)
- Hope Adamson
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, UK.
| | - Alan M Bond
- School of Chemistry, Monash University, Clayton, VIC 3800, Australia.
| | - Alison Parkin
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, UK.
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32
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Tao L, Simonov AN, Romano CA, Butterfield CN, Tebo BM, Bond AM, Spiccia L, Martin LL, Casey WH. Probing Electron Transfer in the Manganese‐Oxide‐Forming MnxEFG Protein Complex using Fourier Transformed AC Voltammetry: Understanding the Oxidative Priming Effect. ChemElectroChem 2017. [DOI: 10.1002/celc.201700563] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Lizhi Tao
- Department of Chemistry University of California One Shields Avenue Davis California 95616 United States
| | - Alexandr N. Simonov
- A School of Chemistry Monash University Victoria 3800 Australia
- ARC Centre of Excellence for Electromaterials Science Monash University Victoria 3800 Australia
| | - Christine A. Romano
- Division of Environmental and Biomolecular Systems Institute of Environmental Health Oregon Health & Science University Portland Oregon 97239 United States
| | - Cristina N. Butterfield
- Division of Environmental and Biomolecular Systems Institute of Environmental Health Oregon Health & Science University Portland Oregon 97239 United States
| | - Bradley M. Tebo
- Division of Environmental and Biomolecular Systems Institute of Environmental Health Oregon Health & Science University Portland Oregon 97239 United States
| | - Alan M. Bond
- A School of Chemistry Monash University Victoria 3800 Australia
- ARC Centre of Excellence for Electromaterials Science Monash University Victoria 3800 Australia
| | - Leone Spiccia
- A School of Chemistry Monash University Victoria 3800 Australia
- ARC Centre of Excellence for Electromaterials Science Monash University Victoria 3800 Australia
| | | | - William H. Casey
- Department of Chemistry University of California One Shields Avenue Davis California 95616 United States
- Department of Earth and Planetary Sciences University of California One Shields Avenue Davis California 95616 United States
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33
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Adamson H, Robinson M, Wright JJ, Flanagan LA, Walton J, Elton D, Gavaghan DJ, Bond AM, Roessler MM, Parkin A. Retuning the Catalytic Bias and Overpotential of a [NiFe]-Hydrogenase via a Single Amino Acid Exchange at the Electron Entry/Exit Site. J Am Chem Soc 2017; 139:10677-10686. [PMID: 28697596 PMCID: PMC5562392 DOI: 10.1021/jacs.7b03611] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The redox chemistry of the electron entry/exit site in Escherichia coli hydrogenase-1 is shown to play a vital role in tuning biocatalysis. Inspired by nature, we generate a HyaA-R193L variant to disrupt a proposed Arg-His cation-π interaction in the secondary coordination sphere of the outermost, "distal", iron-sulfur cluster. This rewires the enzyme, enhancing the relative rate of H2 production and the thermodynamic efficiency of H2 oxidation catalysis. On the basis of Fourier transformed alternating current voltammetry measurements, we relate these changes in catalysis to a shift in the distal [Fe4S4]2+/1+ redox potential, a previously experimentally inaccessible parameter. Thus, metalloenzyme chemistry is shown to be tuned by the second coordination sphere of an electron transfer site distant from the catalytic center.
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Affiliation(s)
- Hope Adamson
- Department of Chemistry, University of York , Heslington, York YO10 5DD, U.K
| | - Martin Robinson
- Department of Computer Science, University of Oxford , Oxford, OX1 3QD, U.K
| | - John J Wright
- School of Biological and Chemical Sciences, Queen Mary University of London , Mile End Road, London, E1 4NS, U.K
| | - Lindsey A Flanagan
- Department of Chemistry, University of York , Heslington, York YO10 5DD, U.K
| | - Julia Walton
- Department of Chemistry, University of York , Heslington, York YO10 5DD, U.K
| | - Darrell Elton
- Department of Engineering, School of Engineering and Mathematical Sciences, La Trobe University , Melbourne, Victoria 3086, Australia
| | - David J Gavaghan
- Department of Computer Science, University of Oxford , Oxford, OX1 3QD, U.K
| | - Alan M Bond
- School of Chemistry, Monash University , Clayton, Victoria 3800, Australia
| | - Maxie M Roessler
- School of Biological and Chemical Sciences, Queen Mary University of London , Mile End Road, London, E1 4NS, U.K
| | - Alison Parkin
- Department of Chemistry, University of York , Heslington, York YO10 5DD, U.K
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34
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Zhang Y, Chen L, Li F, Easton CD, Li J, Bond AM, Zhang J. Direct Detection of Electron Transfer Reactions Underpinning the Tin-Catalyzed Electrochemical Reduction of CO2 using Fourier-Transformed ac Voltammetry. ACS Catal 2017. [DOI: 10.1021/acscatal.7b01305] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ying Zhang
- School
of Chemistry, Monash University, Wellington Road, Clayton 3800, Victoria, Australia
- ARC
Centre of Excellence for Electromaterials Science, Monash University, Wellington Road, Clayton 3800, Victoria, Australia
| | - Lu Chen
- School
of Chemistry, Monash University, Wellington Road, Clayton 3800, Victoria, Australia
| | - Fengwang Li
- School
of Chemistry, Monash University, Wellington Road, Clayton 3800, Victoria, Australia
- ARC
Centre of Excellence for Electromaterials Science, Monash University, Wellington Road, Clayton 3800, Victoria, Australia
| | | | - Jiezhen Li
- School
of Chemistry, Monash University, Wellington Road, Clayton 3800, Victoria, Australia
| | - Alan. M. Bond
- School
of Chemistry, Monash University, Wellington Road, Clayton 3800, Victoria, Australia
- ARC
Centre of Excellence for Electromaterials Science, Monash University, Wellington Road, Clayton 3800, Victoria, Australia
| | - Jie Zhang
- School
of Chemistry, Monash University, Wellington Road, Clayton 3800, Victoria, Australia
- ARC
Centre of Excellence for Electromaterials Science, Monash University, Wellington Road, Clayton 3800, Victoria, Australia
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35
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Chen L, Li F, Bentley CL, Horne M, Bond AM, Zhang J. Electrochemical Reduction of CO2
with an Oxide-Derived Lead Nano-Coralline Electrode in Dimcarb. ChemElectroChem 2017. [DOI: 10.1002/celc.201700217] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Lu Chen
- School of Chemistry and ARC Centre of Excellence for Electromaterials Science; Monash University; Clayton, Vic 3800 Australia
| | - Fengwang Li
- School of Chemistry and ARC Centre of Excellence for Electromaterials Science; Monash University; Clayton, Vic 3800 Australia
| | | | - Mike Horne
- CSIRO Minerals Resources; Clayton, Vic 3168 Australia
| | - Alan M. Bond
- School of Chemistry and ARC Centre of Excellence for Electromaterials Science; Monash University; Clayton, Vic 3800 Australia
| | - Jie Zhang
- School of Chemistry and ARC Centre of Excellence for Electromaterials Science; Monash University; Clayton, Vic 3800 Australia
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36
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Tan SY, Unwin PR, Macpherson JV, Zhang J, Bond AM. Probing Electrode Heterogeneity Using Fourier-Transformed Alternating Current Voltammetry: Application to a Dual-Electrode Configuration. Anal Chem 2017; 89:2830-2837. [DOI: 10.1021/acs.analchem.6b03924] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sze-yin Tan
- School
of Chemistry, Monash University, Clayton, Victoria 3800, Australia
- Department
of Chemistry, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Patrick R. Unwin
- Department
of Chemistry, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Julie V. Macpherson
- Department
of Chemistry, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Jie Zhang
- School
of Chemistry, Monash University, Clayton, Victoria 3800, Australia
| | - Alan M. Bond
- School
of Chemistry, Monash University, Clayton, Victoria 3800, Australia
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37
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Martin LL, Kubeil C, Simonov AN, Kuznetsov VL, Corbin CJ, Auchus RJ, Conley AJ, Bond AM, Rodgers RJ. Electrochemistry of cytochrome P450 17α-hydroxylase/17,20-lyase (P450c17). Mol Cell Endocrinol 2017; 441:62-67. [PMID: 27702589 DOI: 10.1016/j.mce.2016.09.034] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Revised: 09/14/2016] [Accepted: 09/30/2016] [Indexed: 01/06/2023]
Abstract
Within the superfamily of cytochrome P450 enzymes (P450s), there is a small class which is functionally employed for steroid biosynthesis. The enzymes in this class appear to have a small active site to accommodate the steroid substrates specifically and snuggly, prior to the redox transformation or hydroxylation to form a product. Cytochrome P450c17 is one of these and is also a multi-functional P450, with two activities, the first 17α-hydroxylation of pregnenolone is followed by a subsequent 17,20-lyase transformation to dehydroepiandrosterone (DHEA) as the dominant pathways to cortisol precursors or androgens in humans, respectively. How P450c17 regulates these two redox reactions is of special interest. There is a paucity of direct electrochemical studies on steroidogenic P450s, and in this mini-review we provide an overview of these studies with P450c17. Historical consideration as to the difficulties in obtaining reliable electrochemistry due to issues of handling proteins on an electrode, together with advances in the electrochemical techniques are addressed. Recent work using Fourier transformed alternating current voltammetry is highlighted as this technique can provide both catalytic information simultaneously with the underlying redox transfer with the P450 haem.
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Affiliation(s)
- Lisandra L Martin
- School of Chemistry, Monash University, Clayton, Victoria, 3800, Australia.
| | - Clemens Kubeil
- School of Chemistry, Monash University, Clayton, Victoria, 3800, Australia
| | - Alexandr N Simonov
- School of Chemistry, Monash University, Clayton, Victoria, 3800, Australia; ARC Centre of Excellence for Electromaterials Science, Monash University, Clayton, Victoria, 3800, Australia
| | - Vladimir L Kuznetsov
- Boreskov Institute of Catalysis, Prospekt Lavrentieva 5, Novosibirsk, 630090, Russia
| | - C Jo Corbin
- School of Veterinary Medicine, University of California, Davis, CA, 95616, USA
| | - Richard J Auchus
- Division of Metabolism, Endocrinology and Diabetes, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Alan J Conley
- School of Veterinary Medicine, University of California, Davis, CA, 95616, USA
| | - Alan M Bond
- School of Chemistry, Monash University, Clayton, Victoria, 3800, Australia; ARC Centre of Excellence for Electromaterials Science, Monash University, Clayton, Victoria, 3800, Australia
| | - Raymond J Rodgers
- Discipline of Obstetrics and Gynaecology, School of Medicine, Robinson Research Institute, University of Adelaide, Adelaide, South Australia, 5005, Australia
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38
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Adamson H, Robinson M, Bond PS, Soboh B, Gillow K, Simonov AN, Elton DM, Bond AM, Sawers RG, Gavaghan DJ, Parkin A. Analysis of HypD Disulfide Redox Chemistry via Optimization of Fourier Transformed ac Voltammetric Data. Anal Chem 2017; 89:1565-1573. [PMID: 28029041 DOI: 10.1021/acs.analchem.6b03589] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Rapid disulfide bond formation and cleavage is an essential mechanism of life. Using large amplitude Fourier transformed alternating current voltammetry (FTacV) we have measured previously uncharacterized disulfide bond redox chemistry in Escherichia coli HypD. This protein is representative of a class of assembly proteins that play an essential role in the biosynthesis of the active site of [NiFe]-hydrogenases, a family of H2-activating enzymes. Compared to conventional electrochemical methods, the advantages of the FTacV technique are the high resolution of the faradaic signal in the higher order harmonics and the fact that a single electrochemical experiment contains all the data needed to estimate the (very fast) electron transfer rates (both rate constants ≥ 4000 s-1) and quantify the energetics of the cysteine disulfide redox-reaction (reversible potentials for both processes approximately -0.21 ± 0.01 V vs SHE at pH 6). Previously, deriving such data depended on an inefficient manual trial-and-error approach to simulation. As a highly advantageous alternative, we describe herein an automated multiparameter data optimization analysis strategy where the simulated and experimental faradaic current data are compared for both the real and imaginary components in each of the 4th to 12th harmonics after quantifying the charging current data using the time-domain response.
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Affiliation(s)
- Hope Adamson
- Department of Chemistry, University of York , Heslington, York, YO10 5DD, United Kingdom
| | - Martin Robinson
- Department of Computer Science, University of Oxford , Wolfson Building, Parks Road, Oxford, OX1 3QD, United Kingdom
| | - Paul S Bond
- Department of Chemistry, University of York , Heslington, York, YO10 5DD, United Kingdom
| | - Basem Soboh
- Experimental Molecular Biophysics, Freie Universität Berlin , Arnimalle 14, 14195 Berlin, Germany
| | - Kathryn Gillow
- Mathematical Institute, Andrew Wiles Building, University of Oxford , Radcliffe Observatory Quarter, Woodstock Road, Oxford, OX2 6GG, United Kingdom
| | - Alexandr N Simonov
- School of Chemistry and the ARC Centre of Excellence for Electromaterials Science, Monash University , Clayton, Victoria 3800, Australia
| | - Darrell M Elton
- School of Engineering and Mathematical Sciences, La Trobe University , Bundoora, Victoria 3086, Australia
| | - Alan M Bond
- School of Chemistry and the ARC Centre of Excellence for Electromaterials Science, Monash University , Clayton, Victoria 3800, Australia
| | - R Gary Sawers
- Institute for Biology/Microbiology, Martin Luther University Halle-Wittenberg , Halle (Saale), Germany
| | - David J Gavaghan
- Department of Computer Science, University of Oxford , Wolfson Building, Parks Road, Oxford, OX1 3QD, United Kingdom
| | - Alison Parkin
- Department of Chemistry, University of York , Heslington, York, YO10 5DD, United Kingdom
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39
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Tao L, Simonov AN, Romano CA, Butterfield CN, Fekete M, Tebo BM, Bond AM, Spiccia L, Martin LL, Casey WH. Biogenic Manganese-Oxide Mineralization is Enhanced by an Oxidative Priming Mechanism for the Multi-Copper Oxidase, MnxEFG. Chemistry 2016; 23:1346-1352. [PMID: 27726210 DOI: 10.1002/chem.201603803] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2016] [Indexed: 11/07/2022]
Abstract
In a natural geochemical cycle, manganese-oxide minerals (MnOx ) are principally formed through a microbial process, where a putative multicopper oxidase MnxG plays an essential role. Recent success in isolating the approximately 230 kDa, enzymatically active MnxEFG protein complex, has advanced our understanding of biogenic MnOx mineralization. Here, the kinetics of MnOx formation catalyzed by MnxEFG are examined using a quartz crystal microbalance (QCM), and the first electrochemical characterization of the MnxEFG complex is reported using Fourier transformed alternating current voltammetry. The voltammetric studies undertaken using near-neutral solutions (pH 7.8) establish the apparent reversible potentials for the Type 2 Cu sites in MnxEFG immobilized on a carboxy-terminated monolayer to be in the range 0.36-0.40 V versus a normal hydrogen electrode. Oxidative priming of the MnxEFG protein complex substantially enhances the enzymatic activity, as found by in situ electrochemical QCM analysis. The biogeochemical significance of this enzyme is clear, although the role of an oxidative priming of catalytic activity might be either an evolutionary advantage or an ancient relic of primordial existence.
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Affiliation(s)
- Lizhi Tao
- Department of Chemistry and Department of Earth and Planetary Sciences, University of California, One Shields Avenue, Davis, California, 95616, USA
| | - Alexandr N Simonov
- School of Chemistry, Monash University, Victoria, 3800, Australia.,ARC Centre of Excellence for Electromaterials Science, Monash University, Victoria, 3800, Australia
| | - Christine A Romano
- Division of Environmental and Biomolecular Systems, Institute of Environmental Health, Oregon Health & Science University, Portland, Oregon, 97239, USA
| | - Cristina N Butterfield
- Division of Environmental and Biomolecular Systems, Institute of Environmental Health, Oregon Health & Science University, Portland, Oregon, 97239, USA.,Current address: Department of Earth and Planetary Science, University of California Berkeley, Berkeley, California, 94720, USA
| | - Monika Fekete
- School of Chemistry, Monash University, Victoria, 3800, Australia
| | - Bradley M Tebo
- Division of Environmental and Biomolecular Systems, Institute of Environmental Health, Oregon Health & Science University, Portland, Oregon, 97239, USA
| | - Alan M Bond
- School of Chemistry, Monash University, Victoria, 3800, Australia
| | - Leone Spiccia
- School of Chemistry, Monash University, Victoria, 3800, Australia.,ARC Centre of Excellence for Electromaterials Science, Monash University, Victoria, 3800, Australia
| | | | - William H Casey
- Department of Chemistry and Department of Earth and Planetary Sciences, University of California, One Shields Avenue, Davis, California, 95616, USA
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40
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Bonke SA, Bond AM, Spiccia L, Simonov AN. Parameterization of Water Electrooxidation Catalyzed by Metal Oxides Using Fourier Transformed Alternating Current Voltammetry. J Am Chem Soc 2016; 138:16095-16104. [DOI: 10.1021/jacs.6b10304] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Shannon A. Bonke
- School of Chemistry and the
ARC Centre of Excellence for Electromaterials Science, Monash University, Clayton, Victoria 3800, Australia
| | - Alan M. Bond
- School of Chemistry and the
ARC Centre of Excellence for Electromaterials Science, Monash University, Clayton, Victoria 3800, Australia
| | - Leone Spiccia
- School of Chemistry and the
ARC Centre of Excellence for Electromaterials Science, Monash University, Clayton, Victoria 3800, Australia
| | - Alexandr N. Simonov
- School of Chemistry and the
ARC Centre of Excellence for Electromaterials Science, Monash University, Clayton, Victoria 3800, Australia
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41
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Mirceski V, Guziejewski D, Bozem M, Bogeski I. Characterizing electrode reactions by multisampling the current in square-wave voltammetry. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2016.07.128] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
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42
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Electrode Material Dependence of the Electron Transfer Kinetics Associated with the [SVW11O40]3−/4− (VV/IV) and [SVW11O40]4−/5− (WVI/V) Processes in Dimethylformamide. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2016.03.107] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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43
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Simonov AN, Morris GP, Mashkina E, Bethwaite B, Gillow K, Baker RE, Gavaghan DJ, Bond AM. Multiparameter Estimation in Voltammetry When an Electron Transfer Process Is Coupled to a Chemical Reaction. Anal Chem 2016; 88:4724-32. [PMID: 27041344 DOI: 10.1021/acs.analchem.5b04820] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Estimation of thermodynamic and kinetic parameters in electrochemical studies is usually undertaken via comparison of the experimental results with theory based on a model that mimics the experiment. The present study examines the credibility of transient d.c. and a.c. voltammetric theory-experiment comparisons for recovery of the parameters needed to model the ubiquitous mechanism when an electron transfer (E) reaction is followed by a chemical (C) step in the EC process ([Formula: see text]). The data analysis has been undertaken using optimization methods facilitated in some cases by grid computing. These techniques have been applied to the simulated (5% noise added) and experimental (reduction of trans-stilbene) voltammograms to assess the capabilities of parameter recovery of E(0) (reversible potential for the E step), k(0) (heterogeneous electron transfer rate constant at E(0)), α (charge transfer coefficient for the E step), and k(f) and k(b) (forward and backward rate constants for the C step) under different kinetic regimes. The advantages provided by the use of a.c. instead of d.c. voltammetry and data optimization methods over heuristic approaches to "experiment"-theory comparisons are discussed, as are the limitations in the efficient recovery of a unique set of parameters for the EC mechanism. In the particular experimental case examined herein, results for the protonation of the electrochemically generated stilbene dianion demonstrate that, notwithstanding significant advances in experiment and theory of voltammetric analysis, reliable recovery of the parameters for the EC mechanism with a fast chemical process remains a stiff problem.
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Affiliation(s)
- Alexandr N Simonov
- School of Chemistry, Monash University , Clayton, Victoria 3800, Australia
| | - Graham P Morris
- Mathematical Institute, University of Oxford , Radcliffe Observatory Quarter, Woodstock Road, Oxford, OX2 6GG, United Kingdom
| | - Elena Mashkina
- School of Chemistry, Monash University , Clayton, Victoria 3800, Australia
| | - Blair Bethwaite
- Monash eResearch Centre, Monash University , Clayton, Victoria 3800, Australia
| | - Kathryn Gillow
- Mathematical Institute, University of Oxford , Radcliffe Observatory Quarter, Woodstock Road, Oxford, OX2 6GG, United Kingdom
| | - Ruth E Baker
- Mathematical Institute, University of Oxford , Radcliffe Observatory Quarter, Woodstock Road, Oxford, OX2 6GG, United Kingdom
| | - David J Gavaghan
- Department of Computer Science, University of Oxford , Wolfson Building, Parks Road, Oxford, OX1 3QD, United Kingdom
| | - Alan M Bond
- School of Chemistry, Monash University , Clayton, Victoria 3800, Australia
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Liu Y, Zhao SF, Guo SX, Bond AM, Zhang J, Zhu G, Hill CL, Geletii YV. Electrooxidation of Ethanol and Methanol Using the Molecular Catalyst [{Ru4O4(OH)2(H2O)4}(γ-SiW10O36)2]10–. J Am Chem Soc 2016; 138:2617-28. [DOI: 10.1021/jacs.5b11408] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- YuPing Liu
- School of Chemistry and ARC
Centre of Excellence for Electromaterials Science, Monash University, Clayton, Victoria 3800, Australia
| | - Shu-Feng Zhao
- School of Chemistry and ARC
Centre of Excellence for Electromaterials Science, Monash University, Clayton, Victoria 3800, Australia
| | - Si-Xuan Guo
- School of Chemistry and ARC
Centre of Excellence for Electromaterials Science, Monash University, Clayton, Victoria 3800, Australia
| | - Alan M. Bond
- School of Chemistry and ARC
Centre of Excellence for Electromaterials Science, Monash University, Clayton, Victoria 3800, Australia
| | - Jie Zhang
- School of Chemistry and ARC
Centre of Excellence for Electromaterials Science, Monash University, Clayton, Victoria 3800, Australia
| | - Guibo Zhu
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - Craig L. Hill
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - Yurii V. Geletii
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
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Li J, Bentley CL, Bond AM, Zhang J. Dual-Frequency Alternating Current Designer Waveform for Reliable Voltammetric Determination of Electrode Kinetics Approaching the Reversible Limit. Anal Chem 2016; 88:2367-74. [DOI: 10.1021/acs.analchem.5b04354] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jiezhen Li
- School of Chemistry and Australian
Research Council Centre of Excellence for Electromaterials Science, Monash University, Clayton, Victoria 3800, Australia
| | - Cameron L. Bentley
- School of Chemistry and Australian
Research Council Centre of Excellence for Electromaterials Science, Monash University, Clayton, Victoria 3800, Australia
| | - Alan M. Bond
- School of Chemistry and Australian
Research Council Centre of Excellence for Electromaterials Science, Monash University, Clayton, Victoria 3800, Australia
| | - Jie Zhang
- School of Chemistry and Australian
Research Council Centre of Excellence for Electromaterials Science, Monash University, Clayton, Victoria 3800, Australia
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Simonov AN, Holien JK, Yeung JCI, Nguyen AD, Corbin CJ, Zheng J, Kuznetsov VL, Auchus RJ, Conley AJ, Bond AM, Parker MW, Rodgers RJ, Martin LL. Mechanistic Scrutiny Identifies a Kinetic Role for Cytochrome b5 Regulation of Human Cytochrome P450c17 (CYP17A1, P450 17A1). PLoS One 2015; 10:e0141252. [PMID: 26587646 PMCID: PMC4654539 DOI: 10.1371/journal.pone.0141252] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2015] [Accepted: 10/06/2015] [Indexed: 01/12/2023] Open
Abstract
Cytochrome P450c17 (P450 17A1, CYP17A1) is a critical enzyme in the synthesis of androgens and is now a target enzyme for the treatment of prostate cancer. Cytochrome P450c17 can exhibit either one or two physiological enzymatic activities differentially regulated by cytochrome b5. How this is achieved remains unknown. Here, comprehensive in silico, in vivo and in vitro analyses were undertaken. Fluorescence Resonance Energy Transfer analysis showed close interactions within living cells between cytochrome P450c17 and cytochrome b5. In silico modeling identified the sites of interaction and confirmed that E48 and E49 residues in cytochrome b5 are essential for activity. Quartz crystal microbalance studies identified specific protein-protein interactions in a lipid membrane. Voltammetric analysis revealed that the wild type cytochrome b5, but not a mutated, E48G/E49G cyt b5, altered the kinetics of electron transfer between the electrode and the P450c17. We conclude that cytochrome b5 can influence the electronic conductivity of cytochrome P450c17 via allosteric, protein-protein interactions.
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Affiliation(s)
| | - Jessica K. Holien
- ACRF Rational Drug Discovery Centre, St. Vincent's Institute of Medical Research, Fitzroy, Victoria, Australia
| | | | - Ann D. Nguyen
- School of Veterinary Medicine, University of California Davis, Davis, California, United States of America
| | - C. Jo Corbin
- School of Veterinary Medicine, University of California Davis, Davis, California, United States of America
| | - Jie Zheng
- Department of Physiology and Membrane Biology, School of Medicine, University of California Davis, Davis, California, United States of America
| | | | - Richard J. Auchus
- Division of Metabolism, Endocrinology and Diabetes, Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan, United States of America
| | - Alan J. Conley
- School of Veterinary Medicine, University of California Davis, Davis, California, United States of America
| | - Alan M. Bond
- School of Chemistry, Monash University, Clayton, Victoria, Australia
| | - Michael W. Parker
- ACRF Rational Drug Discovery Centre, St. Vincent's Institute of Medical Research, Fitzroy, Victoria, Australia
- Department of Biochemistry and Molecular Biology, Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, Parkville, Victoria, Australia
| | - Raymond J. Rodgers
- Discipline of Obstetrics and Gynaecology, School of Paediatrics and Reproductive Health, Robinson Research Institute, University of Adelaide, Adelaide, South Australia, Australia
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Electrochemical evidence that pyranopterin redox chemistry controls the catalysis of YedY, a mononuclear Mo enzyme. Proc Natl Acad Sci U S A 2015; 112:14506-11. [PMID: 26561582 DOI: 10.1073/pnas.1516869112] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A long-standing contradiction in the field of mononuclear Mo enzyme research is that small-molecule chemistry on active-site mimic compounds predicts ligand participation in the electron transfer reactions, but biochemical measurements only suggest metal-centered catalytic electron transfer. With the simultaneous measurement of substrate turnover and reversible electron transfer that is provided by Fourier-transformed alternating-current voltammetry, we show that Escherichia coli YedY is a mononuclear Mo enzyme that reconciles this conflict. In YedY, addition of three protons and three electrons to the well-characterized "as-isolated" Mo(V) oxidation state is needed to initiate the catalytic reduction of either dimethyl sulfoxide or trimethylamine N-oxide. Based on comparison with earlier studies and our UV-vis redox titration data, we assign the reversible one-proton and one-electron reduction process centered around +174 mV vs. standard hydrogen electrode at pH 7 to a Mo(V)-to-Mo(IV) conversion but ascribe the two-proton and two-electron transition occurring at negative potential to the organic pyranopterin ligand system. We predict that a dihydro-to-tetrahydro transition is needed to generate the catalytically active state of the enzyme. This is a previously unidentified mechanism, suggested by the structural simplicity of YedY, a protein in which Mo is the only metal site.
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