dc.contributor.author | Lu, Pai | |
dc.contributor.author | Chen, Xuyuan | |
dc.date.accessioned | 2024-02-12T14:15:30Z | |
dc.date.available | 2024-02-12T14:15:30Z | |
dc.date.created | 2021-12-03T10:37:17Z | |
dc.date.issued | 2021 | |
dc.identifier.citation | Lu, P., & Chen, X. (2021). Nanoscale hetero-structured Co−Co(OH)2 composite/amorphous carbon core/shell bi-functional electrocatalysts electrochemically evolved from metastable hexagonal-phase cobalt for overall water splitting. Electrochimica Acta, 386, Artikkel 138517. | en_US |
dc.identifier.issn | 0013-4686 | |
dc.identifier.uri | https://hdl.handle.net/11250/3117063 | |
dc.description.abstract | Bi-functional electrocatalysts suited to alkaline water splitting systems are highly pursued, towards the most realistic application enabled by simplified electrolyzer design and cost-effective operation. Herein, a novel nanocomposite Co−Co(OH)2/C electrocatalyst with nanoscale hetero-structured metastable hexagonal-phase Co (H-Co) crystallites and Co(OH)2 crystallites encapsulated by amorphous carbon shells is developed. We employ a mild thermal decomposition route coupled with in-situ carbon deposition performed at 400 °C to prepare H-Co/C core/shell structured precursor. In a following controllable electrochemical transformation at room temperature the partial conversion of the metastable H-Co to Co(OH)2 leads to the mutual embedding of nanoscale crystalline H-Co and Co(OH)2 confined in the amorphous carbon shells. Taking advantage of the nanowire array morphology, carbon coated core/shell structure, nanoscale size, and the synergistic H-Co and Co(OH)2 bi-components, an outstanding bi-functional electrocatalytic performance for overall water splitting is attained with proved small overpotentials (93 mV for hydrogen evolution reaction, 264 mV for oxygen evolution reaction at 10 mA cm−2). | en_US |
dc.language.iso | eng | en_US |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/deed.no | * |
dc.title | Nanoscale hetero-structured Co-Co(OH)2 composite/amorphous carbon core/shell bi-functional electrocatalysts electrochemically evolved from metastable hexagonal-phase cobalt for overall water splitting | en_US |
dc.title.alternative | Nanoscale hetero-structured Co-Co(OH)(2) composite/amorphous carbon core/shell bi-functional electrocatalysts electrochemically evolved from metastable hexagonal-phase cobalt for overall water splitting | en_US |
dc.type | Peer reviewed | en_US |
dc.type | Journal article | en_US |
dc.description.version | acceptedVersion | en_US |
dc.rights.holder | Except where otherwise noted, this item's license is described as Attribution- NonCommercial-NoDerivatives 4.0 Internasjonal. | en_US |
dc.source.volume | 386 | en_US |
dc.source.journal | Electrochimica Acta | en_US |
dc.identifier.doi | https://doi.org/10.1016/j.electacta.2021.138517 | |
dc.identifier.cristin | 1964084 | |
dc.source.articlenumber | 138517 | en_US |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 2 | |