Galvanic restructuring of exsolved nanoparticles for plasmonic and electrocatalytic energy conversion
Kang, Xiaolan and Reinertsen, Vilde Mari and Both, Kevin Gregor and Galeckas, Augustinas and Aarholt, Thomas and Prytz, Øystein and Norby, Truls and Neagu, Dragos and Chatzitakis, Athanasios (2022) Galvanic restructuring of exsolved nanoparticles for plasmonic and electrocatalytic energy conversion. Small, 18 (29). 2201106. ISSN 1613-6810 (https://doi.org/10.1002/smll.202201106)
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Abstract
There is a growing need to control and tune nanoparticles (NPs) to increase their stability and effectiveness, especially for photo‐ and electrochemical energy conversion applications. Exsolved particles are well anchored and can be re‐shaped without changing their initial location and structural arrangement. However, this usually involves lengthy treatments and use of toxic gases. Here, the galvanic replacement/deposition method is used, which is simpler, safer, and leads to a wealth of new hybrid nanostructures with a higher degree of tailorability. The produced NiAu bimetallic nanostructures supported on SrTiO3 display exceptional activity in plasmon‐assisted photoelectrochemical (PEC) water oxidation reactions. In situ scanning transmission electron microscopy is used to visualize the structural evolution of the plasmonic bimetallic structures, while theoretical simulations provide mechanistic insight and correlate the surface plasmon resonance effects with structural features and enhanced PEC performance. The versatility of this concept in shifting catalytic modes to the hydrogen evolution reaction is demonstrated by preparing hybrid NiPt bimetallic NPs of low Pt loadings on highly reduced SrTiO3 supports. This powerful methodology enables the design of supported bimetallic nanomaterials with tunable morphology and catalytic functionalities through minimal engineering.
ORCID iDs
Kang, Xiaolan, Reinertsen, Vilde Mari, Both, Kevin Gregor, Galeckas, Augustinas, Aarholt, Thomas, Prytz, Øystein, Norby, Truls, Neagu, Dragos ORCID: https://orcid.org/0000-0001-7208-1055 and Chatzitakis, Athanasios;-
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Item type: Article ID code: 81207 Dates: DateEvent21 July 2022Published13 June 2022Published Online7 May 2022Accepted19 February 2022SubmittedSubjects: Technology > Chemical engineering Department: Faculty of Engineering > Chemical and Process Engineering Depositing user: Pure Administrator Date deposited: 21 Jun 2022 09:43 Last modified: 02 Dec 2024 01:27 URI: https://strathprints.strath.ac.uk/id/eprint/81207