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Localized Catalytic Activity of Nanomaterials Studied by Scanning Electrochemical Microscopy

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Title: Localized Catalytic Activity of Nanomaterials Studied by Scanning Electrochemical Microscopy
Author: Prins, Scott
Department: Department of Chemistry
Program: Chemistry
Advisor: Chen, Aicheng
Abstract: This work aimed to employ scanning electrochemical microscopy (SECM) and scanning photoelectrochemical microscopy (SPECM) as a multi-purpose tool for the localized modification and measurement of semiconductor photoanodes for water splitting towards energy applications. Various semiconductors were investigated, including nickel cobalt oxide, bismuth vanadate, and titania. They offer high thermal and chemical stability with low toxicity and a large natural abundance of source materials. Modification attempts included anodization, and localized photodeposition of oxygen evolution co-catalysts. Alterations to the substrates led to increased porosity, higher electrochemically active surface areas, and changes to the band structure of the material for improved reaction rates in the oxygen evolution reaction. The localized catalytic activity measurements were facilitated through the use of ultramicroelectrodes (which we attempted to develop in-house) while simultaneously increasing the quality of fabricated electrodes and providing opportunities for the further modification of the ultramicroelectrodes.
URI: https://hdl.handle.net/10214/25752
Date: 2021-05
Terms of Use: All items in the Atrium are protected by copyright with all rights reserved unless otherwise indicated.
Related Publications: Sidhureddy, B.; Prins, S.; Wen, J.; Thiruppathi, A. R.; Govindhan, M.; Chen, A. Synthesis and Electrochemical Study of Mesoporous Nickel-Cobalt Oxides for Efficient Oxygen Reduction. ACS Appl. Mater. Interfaces 2019, 11 (20), 18295–18304. DOI: 10.1021/acsami.8b22351
Embargoed Until: 2022-03-15


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