Unraveling the Cooperative Activity of Hydrophilicity, Conductivity, and Interfacial Active Sites in Alginate‐CNT‐Cuo Self‐Standing Electrodes with Benchmark‐Close Activity for Alkaline Water Splitting

Sanad, Mohamed Fathi; Chava, Venkata S. N.; Zheng, Ting; Pilla, Srikanth; Joddar, Binata; Sreenivasan, Sreeprasad T.

doi:10.1002/adsu.202300283

Title: Unraveling the Cooperative Activity of Hydrophilicity, Conductivity, and Interfacial Active Sites in Alginate‐CNT‐Cuo Self‐Standing Electrodes with Benchmark‐Close Activity for Alkaline Water Splitting

Journal Article · Thu Oct 19 00:00:00 EDT 2023 · Advanced Sustainable Systems

DOI:https://doi.org/10.1002/adsu.202300283· OSTI ID:2202992

Sanad, Mohamed Fathi ^[1]; Chava, Venkata S. N. ^[2]; Zheng, Ting ^[3]; Pilla, Srikanth ^[4]; Joddar, Binata ^[5];

^[6]

Enviromental Sciences and Engineering Program The University of Texas at El Paso 500 W. University Avenue El Paso TX 79968 USA, Department of Chemical Engineering Hampton University Hampton VA 23668 USA
Department of Chemistry and Biochemistry The University of Texas at El Paso 500 W. University Avenue El Paso TX 79968 USA
Department of Automotive Engineering Clemson University 4 Research Drive Greenville SC 29607 USA
Department of Automotive Engineering Clemson University 4 Research Drive Greenville SC 29607 USA, Clemson Composites Centre Clemson University Greenville SC 29607 USA, Department of Materials Science and Engineering Clemson University Clemson SC 29602 USA, Department of Mechanical Engineering Clemson Universi Clemson University Clemson SC 29602 USA
Department of Metallurgical, Materials, and Biomedical Engineering The University of Texas at El Paso 500 W. University Avenue El Paso TX 79968 USA
Enviromental Sciences and Engineering Program The University of Texas at El Paso 500 W. University Avenue El Paso TX 79968 USA, Department of Chemistry and Biochemistry The University of Texas at El Paso 500 W. University Avenue El Paso TX 79968 USA

Abstract Designing electrocatalysts that excel in hydrogen and oxygen electrochemistry is crucial for sustainable hydrogen generation through electrochemical water splitting. This study presents a novel tricomponent catalyst composed of an alginate hydrogel (AL) infused with single‐walled carbon nanotubes (CNTs) and copper oxide (CuO) nanoparticles. The catalyst exhibits benchmark‐close bifunctional activity toward hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) under alkaline conditions. The aerophobic nature of the AL‐gel facilitates superior bubble release from the electrode, while the inclusion of CNTs mitigates charge transfer resistance. Moreover, heterojunctions of CuO and CNTs create unique interfacial active sites, culminating in high electrocatalytic water‐splitting activity. The structural rigidity of the composite permits its use as self‐standing electrodes (SSE) without using substrates or binders, enabling a direct evaluation of its activity. The composite electrode demonstrates exceptional electrocatalytic HER activity in an alkaline solution, with onset potentials of 93 mV and moderate OER activity with an onset of 155 mV. Moreover, a water electrolysis cell featuring the bifunctional SSE exhibits an open circuit voltage of 1.85 V at 100 mA.cm ⁻² , and only 8% efficiency loss after 100 h marking this a significant stride in developing self‐standing nonprecious electrocatalysts with impressive catalytic performance.

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Sponsoring Organization:: USDOE

OSTI ID:: 2202992

Journal Information:: Advanced Sustainable Systems, Journal Name: Advanced Sustainable Systems Vol. 7 Journal Issue: 12; ISSN 2366-7486

Publisher:: Wiley Blackwell (John Wiley & Sons)Copyright Statement

Country of Publication:: Germany

Language:: English

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