Role of vanadium ions substitution on spinel MnCo2O4 towards enhanced electrocatalytic activity for hydrogen generation
dc.contributor.author | Mohamed, MJS | |
dc.contributor.author | Slimani, Y | |
dc.contributor.author | Gondal, MA | |
dc.contributor.author | Almessiere, MA | |
dc.contributor.author | Baykal, A | |
dc.contributor.author | Hassan, M | |
dc.contributor.author | Khan, AZ | |
dc.contributor.author | Roy, A | |
dc.date.accessioned | 2023-02-14T09:25:06Z | |
dc.date.issued | 2023-02-06 | |
dc.date.updated | 2023-02-02T10:35:54Z | |
dc.description.abstract | Improving efficient electrocatalysts (ECs) for hydrogen generation through water splitting is of significant interest in tackling the upcoming energy crisis. Sustainable hydrogen generation is the primary prerequisite to realizing the future hydrogen economy. This work examines the electrocatalytic activity of hydrothermally prepared vanadium doped MnCo spinel oxide microspheres (MC), MnVxCo2−xO4 (Vx-MnCo MC, where x ≤ 0.4) in the HER (hydrogen evolution reaction) process. Magnetization measurements demonstrated a paramagnetic (at high temperatures) to a ferrimagnetic (at low temperatures) transition below the Curie temperature (Tc) in all the samples. The magnetization is found to intensify with the rising vanadium content of MCs. The optimized catalyst Vx-MnCo MCs (x = 0.3) outperformed other prepared ECs with a Tafel slope of 84 mV/dec, a low onset potential of 78.9 mV, and a low overpotential of 85.9 mV at a current density of 10 mA/cm2, respectively. The significantly improved HER performance of hydrothermally synthesized Vx-MnCo MCs (x = 0.3) is principally attributable to many exposed active sites, accelerated electron transport at the EC/electrolyte interface, and remarkable electron spectroscopy for chemical analysis (ECSA) value was found ~ 11.4 cm2. Moreover, the Vx-MnCo MCs (x = 0.3) electrode exhibited outstanding electrocatalytic stability after exposure to 1000 cyclic voltametric cycles and 36 h of chronoamperometric testing. Our results suggest a feasible route for developing earth-abundant transition metal oxide-based EC as a superior electrode for future water electrolysis applications. | en_GB |
dc.description.sponsorship | British Council | en_GB |
dc.description.sponsorship | KACARE Fellowship | en_GB |
dc.identifier.citation | Vol. 13, article 2120 | en_GB |
dc.identifier.doi | 10.1038/s41598-023-29081-2 | |
dc.identifier.uri | http://hdl.handle.net/10871/132466 | |
dc.identifier | ORCID: 0000-0002-2097-9442 (Roy, Anurag) | |
dc.language.iso | en | en_GB |
dc.publisher | Nature Research | en_GB |
dc.rights | © The Author(s) 2023. Open Access. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. | en_GB |
dc.title | Role of vanadium ions substitution on spinel MnCo2O4 towards enhanced electrocatalytic activity for hydrogen generation | en_GB |
dc.type | Article | en_GB |
dc.date.available | 2023-02-14T09:25:06Z | |
dc.identifier.issn | 2045-2322 | |
dc.description | This is the final version. Available on open access from Nature Research via the DOI in this record | en_GB |
dc.description | Data availability: The datasets used and/or analyzed during the current study are available from the corresponding author on reasonable request. | en_GB |
dc.identifier.journal | Scientific Reports | en_GB |
dc.relation.ispartof | Scientific Reports | |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | en_GB |
dcterms.dateAccepted | 2023-01-30 | |
dcterms.dateSubmitted | 2022-12-19 | |
rioxxterms.version | VoR | en_GB |
rioxxterms.licenseref.startdate | 2023-02-06 | |
rioxxterms.type | Journal Article/Review | en_GB |
refterms.dateFCD | 2023-02-02T10:35:57Z | |
refterms.versionFCD | AM | |
refterms.dateFOA | 2023-02-14T09:25:08Z | |
refterms.panel | B | en_GB |
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