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© 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.

Abstract

A rapid, facile, and environmentally benign strategy to electrochemical oxidation of metallic tungsten under pulse alternating current in an aqueous electrolyte solution was reported. Particle size, morphology, and electronic structure of the obtained WO3 nanopowders showed strong dependence on electrolyte composition (nitric, sulfuric, and oxalic acid). The use of oxalic acid as an electrolyte provides a gram-scale synthesis of WO3 nanopowders with tungsten electrochemical oxidation rate of up to 0.31 g·cm−2·h−1 that is much higher compared to the strong acids. The materials were examined as photoanodes in photoelectrochemical reforming of organic substances under solar light. WO3 synthesized in oxalic acid is shown to exhibit excellent activity towards the photoelectrochemical reforming of glucose and ethylene glycol, with photocurrents that are nearly equal to those achieved in the presence of simple alcohol such as ethanol. This work demonstrates the promise of pulse alternating current electrosynthesis in oxalic acid as an efficient and sustainable method to produce WO3 nanopowders for photoelectrochemical applications.

Details

Title
Electrochemical Synthesis-Dependent Photoelectrochemical Properties of Tungsten Oxide Powders
Author
Tsarenko, Anastasia 1 ; Gorshenkov, Mikhail 2 ; Yatsenko, Aleksey 1 ; Zhigunov, Denis 3   VIAFID ORCID Logo  ; Butova, Vera 4 ; Kaichev, Vasily 5   VIAFID ORCID Logo  ; Ulyankina, Anna 1   VIAFID ORCID Logo 

 Research Institute "Nanotechnologies and New Materials", Platov South-Russian State Polytechnic University (NPI), 346428 Novocherkassk, Russia; [email protected] (A.T.); [email protected] (A.Y.) 
 Department of Physical Materials Science, National University of Science & Technology (MISIS), 119049 Moscow, Russia; [email protected] 
 Center for Photonics and Quantum Materials, Skolkovo Institute of Science and Technology, 121205 Moscow, Russia; [email protected] 
 The Smart Materials Research Institute, Southern Federal University, 344090 Rostov-on-Don, Russia; [email protected] 
 Department of Investigation of Catalysts, Boreskov Institute of Catalysis, 630090 Novosibirsk, Russia; [email protected] 
First page
31
Publication year
2022
Publication date
2022
Publisher
MDPI AG
e-ISSN
23057084
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2652959886
Copyright
© 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.