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Deacon-Price C, Changeur L, Santana CS, Garcia AC. The Effect of the Tetraalkylammonium Cation in the Electrochemical CO 2 Reduction Reaction on Copper Electrode. ACS Catal 2024; 14:12928-12939. [PMID: 39263546 PMCID: PMC11385355 DOI: 10.1021/acscatal.4c02297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2024] [Revised: 07/22/2024] [Accepted: 08/06/2024] [Indexed: 09/13/2024]
Abstract
Aprotic organic solvents such as acetonitrile offer a potential solution to promote electrochemical CO2 reduction over the competing hydrogen evolution reaction. Tetraalkylammonium cations (TAA+) are widely used as supporting electrolytes in organic media due to their high solubility and conductivity. The alkyl chain length of TAA+ cations is known to influence electron transfer processes in electrochemical systems by the adsorption of TAA+, causing modifications of the double layer. In this work, we elucidate the influence of the cation chain length on the mechanism and selectivity of the CO2RR reaction under controlled dry and wet acetonitrile conditions on copper cathodes. We find that the hydrophobic hydration character of the cation, which can be tuned by the chain length, has an effect on product distribution, altering the reaction pathway. Under dry conditions, smaller cations (TEA+) preferentially promote oxalate production via dimerization of the CO2 ·- intermediate, whereas formate is favored in the presence of water via protonation reaction. Larger cations (TBA+ > TPA+ > TEA+) favor the generation of CO regardless of water content. In situ FTIR analysis showed that TBA+ cations are able to stabilize adsorbed CO more effectively than TEA+, explaining why larger cations generate a higher proportion of CO. Our findings also suggest that higher cation concentrations suppress hydrogen evolution, particularly with larger cations, highlighting the role of cation chain length size and hydrophobic hydration shell.
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Affiliation(s)
- Connor Deacon-Price
- Van't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Louis Changeur
- Van't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Cássia S Santana
- Van't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Amanda C Garcia
- Van't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
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2
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Fernández-Vidal J, Hardwick LJ, Cabello G, Attard GA. Effect of alkali-metal cation on oxygen adsorption at Pt single-crystal electrodes in non-aqueous electrolytes. Faraday Discuss 2024; 248:102-118. [PMID: 37753622 DOI: 10.1039/d3fd00084b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/28/2023]
Abstract
The effect of Group 1 alkali-metal cations (Na+, K+, and Cs+) on the oxygen reduction and evolution reactions (ORR and OER) using dimethyl sulfoxide (DMSO)-based electrolytes was investigated. Cyclic voltammetry (CV) utilising different Pt-electrode surfaces (polycrystalline Pt, Pt(111) and Pt(100)) was undertaken to investigate the influence of surface structure upon the ORR and OER. For K+ and Cs+, negligible variation in the CV response (in contrast to Na+) was observed using Pt(111), Pt(100) and Pt(poly) electrodes, consistent with a weak surface-metal/superoxide complex interaction. Indeed, changes in the half-wave potentials (E1/2) and relative intensities of the redox peaks corresponding to superoxy (O2-) and peroxy (O22-) ion formation were consistent with a solution-mediated mechanism for larger cations, such as Cs+. Support for this finding was obtained via in situ shell-isolated nanoparticle-enhanced Raman spectroscopy (SHINERS). During the ORR and in the presence of Cs+, O2- and weakly adsorbed caesium superoxide (CsO2) species were detected. Because DMSO was found to strongly interact with the surface at potentials associated with the ORR, CsO2 was readily displaced at more negative potentials via increased solvent adsorption at the surface. This finding highlights the important impact of the solvent during ORR/OER reactions.
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Affiliation(s)
- Julia Fernández-Vidal
- Stephenson Institute for Renewable Energy, Department of Chemistry, University of Liverpool, Peach Street, L69 7ZF Liverpool, UK
| | - Laurence J Hardwick
- Stephenson Institute for Renewable Energy, Department of Chemistry, University of Liverpool, Peach Street, L69 7ZF Liverpool, UK
| | - Gema Cabello
- Stephenson Institute for Renewable Energy, Department of Chemistry, University of Liverpool, Peach Street, L69 7ZF Liverpool, UK
| | - Gary A Attard
- Department of Physics, University of Liverpool, Crown Street, L69 7ZD Liverpool, UK.
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3
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Zhang J, Zhang XG, Dong JC, Radjenovic PM, Young DJ, Yao JL, Yuan YX, Tian ZQ, Li JF. Real-Time Monitoring of Surface Effects on the Oxygen Reduction Reaction Mechanism for Aprotic Na-O 2 Batteries. J Am Chem Soc 2021; 143:20049-20054. [PMID: 34812610 DOI: 10.1021/jacs.1c10009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Discharging of aprotic sodium-oxygen (Na-O2) batteries is driven by the cathodic oxygen reduction reaction in the presence of sodium cations (Na+-ORR). However, the mechanism of aprotic Na+-ORR remains ambiguous and is system dependent. In-situ electrochemical Raman spectroscopy has been employed to study the aprotic Na+-ORR processes at three atomically ordered Au(hkl) single-crystal surfaces for the first time, and the structure-intermediates/mechanism relationship has been identified at a molecular level. Direct spectroscopic evidence of superoxide on Au(110) and peroxide on Au(100) and Au(111) as intermediates/products has been obtained. Combining these experimental results with theoretical simulation has revealed that the surface effect of Au(hkl) electrodes on aprotic Na+-ORR activity is mainly caused by the different adsorption of Na+ and O2. This work enhances our understanding of aprotic Na+-ORR on Au(hkl) surfaces and provides further guidance for the design of improved Na-O2 batteries.
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Affiliation(s)
- Jing Zhang
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China.,State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, College of Energy, iChEM, Xiamen University, Xiamen 361005, China
| | - Xia-Guang Zhang
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, College of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, China
| | - Jin-Chao Dong
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, College of Energy, iChEM, Xiamen University, Xiamen 361005, China
| | - Petar M Radjenovic
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, College of Energy, iChEM, Xiamen University, Xiamen 361005, China
| | - David James Young
- College of Engineering, Information Technology and Environment, Charles Darwin University, Casuarina, Northern Territory 0909, Australia
| | - Jian-Lin Yao
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Ya-Xian Yuan
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Zhong-Qun Tian
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, College of Energy, iChEM, Xiamen University, Xiamen 361005, China
| | - Jian-Feng Li
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, College of Energy, iChEM, Xiamen University, Xiamen 361005, China
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Lu YT, Neale AR, Hu CC, Hardwick LJ. Trapped interfacial redox introduces reversibility in the oxygen reduction reaction in a non-aqueous Ca 2+ electrolyte. Chem Sci 2021; 12:8909-8919. [PMID: 34257892 PMCID: PMC8246276 DOI: 10.1039/d0sc06991d] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Accepted: 05/28/2021] [Indexed: 01/14/2023] Open
Abstract
Electrochemical investigations of the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) have been conducted in a Ca2+-containing dimethyl sulfoxide electrolyte. While the ORR appears irreversible, the introduction of a tetrabutylammonium perchlorate (TBAClO4) co-salt in excess concentrations results in the gradual appearance of a quasi-reversible OER process. Combining the results of systematic cyclic voltammetry investigations, the degree of reversibility depends on the ion pair competition between Ca2+ and TBA+ cations to interact with generated superoxide (O2 -). When TBA+ is in larger concentrations, and large reductive overpotentials are applied, a quasi-reversible OER peak emerges with repeated cycling (characteristic of formulations without Ca2+ cations). In situ Raman microscopy and rotating ring-disc electrode (RRDE) experiments revealed more about the nature of species formed at the electrode surface and indicated the progressive evolution of a charge storage mechanism based upon trapped interfacial redox. The first electrochemical step involves generation of O2 -, followed primarily by partial passivation of the surface by Ca x O y product formation (the dominant initial reaction). Once this product matrix develops, the subsequent formation of TBA+--O2 - is contained within the Ca x O y product interlayer at the electrode surface and, consequently, undergoes a facile oxidation reaction to regenerate O2.
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Affiliation(s)
- Yi-Ting Lu
- Stephenson Institute for Renewable Energy, Department of Chemistry, University of Liverpool Liverpool L69 7ZD UK
- Department of Chemical Engineering, National Tsing Hua University Hsin-Chu 300044 Taiwan
| | - Alex R Neale
- Stephenson Institute for Renewable Energy, Department of Chemistry, University of Liverpool Liverpool L69 7ZD UK
| | - Chi-Chang Hu
- Department of Chemical Engineering, National Tsing Hua University Hsin-Chu 300044 Taiwan
| | - Laurence J Hardwick
- Stephenson Institute for Renewable Energy, Department of Chemistry, University of Liverpool Liverpool L69 7ZD UK
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Galloway TA, Dong JC, Li JF, Attard G, Hardwick LJ. Oxygen reactions on Pt{ hkl} in a non-aqueous Na + electrolyte: site selective stabilisation of a sodium peroxy species. Chem Sci 2019; 10:2956-2964. [PMID: 30996874 PMCID: PMC6427968 DOI: 10.1039/c8sc05489d] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2018] [Accepted: 01/17/2019] [Indexed: 01/09/2023] Open
Abstract
The oxygen reduction and evolution reaction in the presence of sodium ions in an organic solvent is studied on well-defined Pt electrode surfaces.
Sodium–oxygen battery cathodes utilise the reversible redox species of oxygen in the presence of sodium ions. However, the oxygen reduction and evolution reaction mechanism is yet to be conclusively determined. In order to examine the part played by surface structure in sodium–oxygen electrochemistry for the development of catalytic materials and structures, a method of preparing clean, well-defined Pt electrode surfaces for adsorption studies in aprotic solvents is described. Using cyclic voltammetry (CV) and in situ electrochemical shell-isolated nanoparticle enhanced Raman spectroscopy (SHINERS), the various stages of oxygen reduction as a function of potential have been determined. It is found that on Pt{111} and Pt{110}-(1 × 1) terraces, a long lived surface sodium peroxide species is formed reversibly, whereas on Pt{100} and polycrystalline electrodes, this species is not detected.
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Affiliation(s)
- Thomas A Galloway
- Stephenson Institute for Renewable Energy , Department of Chemistry , University of Liverpool , UK .
| | - Jin-Chao Dong
- State Key Laboratory of Physical Chemistry and Solid Surfaces , University of Xiamen , China
| | - Jian-Feng Li
- State Key Laboratory of Physical Chemistry and Solid Surfaces , University of Xiamen , China
| | - Gary Attard
- Department of Physics , University of Liverpool , UK
| | - Laurence J Hardwick
- Stephenson Institute for Renewable Energy , Department of Chemistry , University of Liverpool , UK .
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Harlow GS, Aldous IM, Thompson P, Gründer Y, Hardwick LJ, Lucas CA. Adsorption, surface relaxation and electrolyte structure at Pt(111) electrodes in non-aqueous and aqueous acetonitrile electrolytes. Phys Chem Chem Phys 2019; 21:8654-8662. [DOI: 10.1039/c9cp00499h] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Application of synchrotron X-ray scattering to probe the atomic structure of the interface between Pt(111) electrodes and non-aqueous acetonitrile electrolytes.
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Affiliation(s)
- Gary S. Harlow
- Oliver Lodge Laboratory
- Department of Physics
- University of Liverpool
- Liverpool
- UK
| | - Iain M. Aldous
- Department of Chemistry
- University of Liverpool
- Liverpool
- UK
| | - Paul Thompson
- Oliver Lodge Laboratory
- Department of Physics
- University of Liverpool
- Liverpool
- UK
| | - Yvonne Gründer
- Oliver Lodge Laboratory
- Department of Physics
- University of Liverpool
- Liverpool
- UK
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Radjenovic PM, Hardwick LJ. Evaluating chemical bonding in dioxides for the development of metal–oxygen batteries: vibrational spectroscopic trends of dioxygenyls, dioxygen, superoxides and peroxides. Phys Chem Chem Phys 2019; 21:1552-1563. [DOI: 10.1039/c8cp04652b] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Analysis of Raman and IR spectral bands of >200 dioxygen species highlighted the effect of the immediate chemical environment on O–O bonding.
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Affiliation(s)
- Petar M. Radjenovic
- Stephenson Institute for Renewable Energy
- Department of Chemistry
- University of Liverpool
- UK
| | - Laurence J. Hardwick
- Stephenson Institute for Renewable Energy
- Department of Chemistry
- University of Liverpool
- UK
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Radjenovic PM, Hardwick LJ. Time-resolved SERS study of the oxygen reduction reaction in ionic liquid electrolytes for non-aqueous lithium–oxygen cells. Faraday Discuss 2018; 206:379-392. [DOI: 10.1039/c7fd00170c] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
We use the Raman active bands of O2˙− to probe its changing Lewis basicity through its interaction with various ionic liquid electrolytes at the electrode surface.
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Affiliation(s)
- Petar M. Radjenovic
- Stephenson Institute for Renewable Energy
- Department of Chemistry
- University of Liverpool
- UK
| | - Laurence J. Hardwick
- Stephenson Institute for Renewable Energy
- Department of Chemistry
- University of Liverpool
- UK
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9
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Galloway TA, Cabo-Fernandez L, Aldous IM, Braga F, Hardwick LJ. Shell isolated nanoparticles for enhanced Raman spectroscopy studies in lithium–oxygen cells. Faraday Discuss 2017; 205:469-490. [DOI: 10.1039/c7fd00151g] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A critical and detailed assessment of using Shell Isolated Nanoparticles for Enhanced Raman Spectroscopy (SHINERS) on different electrode substrates was carried out, providing relative enhancement factors, as well as an evaluation of the distribution of shell-isolated nanoparticles upon the electrode surfaces. The chemical makeup of surface layers formed upon lithium metal electrodes and the mechanism of the oxygen reduction reaction on carbon substrates relevant to lithium–oxygen cells are studied with the employment of the SHINERS technique. SHINERS enhanced the Raman signal at these surfaces showing a predominant Li2O based layer on lithium metal in a variety of electrolytes. The formation of LiO2and Li2O2, as well as degradation reactions forming Li2CO3, upon planar carbon electrode interfaces and upon composite carbon black electrodes were followed under potential control during the reduction of oxygen in a non-aqueous electrolyte based on dimethyl sulfoxide.
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Affiliation(s)
- Thomas A. Galloway
- Stephenson Institute for Renewable Energy
- Department of Chemistry
- University of Liverpool
- UK
| | - Laura Cabo-Fernandez
- Stephenson Institute for Renewable Energy
- Department of Chemistry
- University of Liverpool
- UK
| | - Iain M. Aldous
- Stephenson Institute for Renewable Energy
- Department of Chemistry
- University of Liverpool
- UK
| | - Filipe Braga
- Stephenson Institute for Renewable Energy
- Department of Chemistry
- University of Liverpool
- UK
| | - Laurence J. Hardwick
- Stephenson Institute for Renewable Energy
- Department of Chemistry
- University of Liverpool
- UK
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10
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Galloway TA, Hardwick LJ. Utilizing in Situ Electrochemical SHINERS for Oxygen Reduction Reaction Studies in Aprotic Electrolytes. J Phys Chem Lett 2016; 7:2119-24. [PMID: 27195529 DOI: 10.1021/acs.jpclett.6b00730] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Spectroscopic detection of reaction intermediates upon a variety of electrode surfaces is of major interest within physical chemistry. A notable technique in the study of the electrochemical interface has been surface-enhanced Raman spectroscopy (SERS). The drawback of SERS is that it is limited to roughened gold and silver substrates. Herein we report that shell-isolated nanoparticles for enhanced Raman spectroscopy (SHINERS) can overcome the limitations of SERS and has followed the oxygen reduction reaction (ORR), within a nonaqueous electrolyte, on glassy carbon, gold, palladium, and platinum disk electrodes. The work presented demonstrates SHINERS for spectroelectrochemical studies for applied and fundamental electrochemistry in aprotic electrolytes, especially for the understanding and development of future metal-oxygen battery applications. In particular, we highlight that with the addition of Li(+), both the electrode surface and solvent influence the ORR mechanism, which opens up the possibility of tailoring surfaces to produce desired reaction pathways.
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Affiliation(s)
- Thomas A Galloway
- Stephenson Institute for Renewable Energy, Department of Chemistry, University of Liverpool , Liverpool L69 7ZD, United Kingdom
| | - Laurence J Hardwick
- Stephenson Institute for Renewable Energy, Department of Chemistry, University of Liverpool , Liverpool L69 7ZD, United Kingdom
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12
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Niu D, Wang H, Li H, Zhang X. The effect of the alkyl chain length of the tetraalkylammonium cation on CO2 electroreduction in an aprotic medium. Electrochem commun 2015. [DOI: 10.1016/j.elecom.2015.01.022] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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