Electrochemical CO2 reduction on Au cluster-based electrodes: investigating the role of nafion ionomer

Simple item page
dc.contributor.authorSharma, SKen_AU
dc.contributor.authorJohannessen, Ben_AU
dc.contributor.authorGolovko, VBen_AU
dc.contributor.authorMarshall, ATen_AU
dc.date.accessioned2025-02-28T01:50:23Zen_AU
dc.date.available2025-02-28T01:50:23Zen_AU
dc.date.issued2023-07-25en_AU
dc.date.statistics2025-02-19en_AU
dc.description.abstractThe performance of electrocatalytic CO2 reduction (CO2RR) depends not only on the catalytic material but also on the neighbouring chemical environment around the active sites. The surrounding local environment can perturb the electronic properties of active sites and alter the adsorption/desorption behaviour of reactant/intermediate/product, thus changing CO2RR characteristics. Herein, we studied electrochemical reduction of CO2 onto supported atomically precise [Au9(PPh3)8](NO3)3 clusters and observed an unusual increase in catalytic activity over time. Additionally, electrochemical activation of the electrodes by applying a more negative potential was found to improve activity of the electrode. Investigations using UV–vis and X-ray absorption spectroscopy revealed that these observations may be attributed to the interaction of the Nafion ionomer with the catalytic Au9 clusters. These interactions may cause partial blocking of the Au9 active sites, and the prolonged application of negative potentials leads to favourable interface reconstructions. In addition, a method was developed to minimise the interaction between the Au9 clusters and Nafion ionomer by first depositing a layer of carbon black followed by dropcasting the active catalyst. Our study highlights that polymeric binders modulate the electronic properties of the electrocatalysts, which can change the product distribution during CO2 electrolysis. © 2023 The Author(s). Published on behalf of The Electrochemical Society by IOP Publishing Limited.en_AU
dc.identifier.articlenumber076509en_AU
dc.identifier.citationSharma, S. K., Johannessen, B., Golovko, V. B., & Marshall, A. T. (2023). Electrochemical CO2 reduction on Au cluster-based electrodes: investigating the role of nafion ionomer. Journal of The Electrochemical Society, 170(7), 076509. doi:10.1149/1945-7111/ace12een_AU
dc.identifier.issn0013-4651en_AU
dc.identifier.issn1945-7111en_AU
dc.identifier.issue7en_AU
dc.identifier.journaltitleJournal of The Electrochemical Societyen_AU
dc.identifier.urihttps://doi.org/10.1149/1945-7111/ace12een_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/16007en_AU
dc.identifier.volume170en_AU
dc.language.isoenen_AU
dc.publisherThe Electrochemical Societyen_AU
dc.subjectElectrochemistryen_AU
dc.subjectCarbon dioxideen_AU
dc.subjectGolden_AU
dc.subjectElectrodesen_AU
dc.subjectCatalystsen_AU
dc.subjectSpectroscopyen_AU
dc.subjectAdsorptionen_AU
dc.subjectDesorptionen_AU
dc.subjectDepositionen_AU
dc.subjectRenewable energy sourcesen_AU
dc.subjectMethaneen_AU
dc.titleElectrochemical CO2 reduction on Au cluster-based electrodes: investigating the role of nafion ionomeren_AU
dc.typeJournal Articleen_AU
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Sharma_2023_J._Electrochem._Soc._170_076509.pdf
Size:
2.13 MB
Format:
Adobe Portable Document Format
Description:
Download
License bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
1.66 KB
Format:
Plain Text
Description:
Download
Collections
Journal Articles