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Metal-Functionalized Hydrogels as Efficient Oxygen Evolution Electrocatalysts
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SYSNO ASEP 0558867 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Metal-Functionalized Hydrogels as Efficient Oxygen Evolution Electrocatalysts Author(s) Tang, C. (CN)
Thomas, B. (US)
Ramirez-Hernandez, M. (US)
Materna Mikmeková, Eliška (UPT-D) ORCID, RID, SAI
Asefa, T. (US)Number of authors 5 Source Title ACS Applied Materials and Interfaces. - : American Chemical Society - ISSN 1944-8244
Roč. 14, č. 18 (2022), s. 20919-20929Number of pages 11 s. Publication form Print - P Language eng - English Country US - United States Keywords hydrogel ; conducting polymer ; oxygen evolution reaction ; phytic acid ; polyaniline Subject RIV JA - Electronics ; Optoelectronics, Electrical Engineering OECD category Electrical and electronic engineering Method of publishing Limited access Institutional support UPT-D - RVO:68081731 UT WOS 000813074800001 EID SCOPUS 85130039620 DOI 10.1021/acsami.2c01667 Annotation Conductive polymer hydrogels have large surface areas and electrical conductivities. Their properties can be further tailored by functionalizing them with metals and nonmetals. However, the potential applications of metal-functionalized hydrogels for electrocatalysis have rarely been investigated. In this work, we report the synthesis of transition-metalfunctionalized polyaniline-phytic acid (PANI-PA) hydrogels that show efficient electrocatalytic activities for the oxygen evolution reaction (OER). Among the many transition metals studied, Fe is accommodated by the hydrogel the most due to the favorable affinity of the PA groups in the hydrogel for Fe. Meanwhile, those containing both Fe and Co are found to be the most effective electrocatalysts for OER. The most optimized such hydrogel, NF@HgelFe0.3Co0.1, which is made using a solution that has a 3:1 ratio of Fe and Co, needs an overpotential of only 280 mV to catalyze OER in 1 M KOH solution with a current density of 10 mV cm-2. Furthermore, these metal-functionalized PANI-PA hydrogels can easily be loaded on the nickel foam or carbon cloth via a simple soak-and-dry method to generate free-standing electrodes. Overall, this work demonstrates a facile synthesis and fabrication of sustainable and efficient OER electrocatalysts and electrodes that are composed of easily processable hydrogels functionalized with earth-abundant transition metals. Workplace Institute of Scientific Instruments Contact Martina Šillerová, sillerova@ISIBrno.Cz, Tel.: 541 514 178 Year of Publishing 2023 Electronic address https://pubs.acs.org/doi/10.1021/acsami.2c01667
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