A robust and highly active bimetallic phosphide/oxide heterostructure electrocatalyst for efficient industrial-scale hydrogen production
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Kirubasankar, Balakrishnan | - |
dc.contributor.author | Kwon, Jisu | - |
dc.contributor.author | Hong, Sohyeon | - |
dc.contributor.author | Won, Yo Seob | - |
dc.contributor.author | Choi, Soo Ho | - |
dc.contributor.author | Lee, Jeeho | - |
dc.contributor.author | Kim, Jae Woo | - |
dc.contributor.author | Kim, Ki Kang | - |
dc.contributor.author | Kim, Soo Min | - |
dc.date.accessioned | 2024-07-23T08:01:22Z | - |
dc.date.available | 2024-07-23T08:01:22Z | - |
dc.date.issued | 2024-09 | - |
dc.identifier.issn | 2211-2855 | - |
dc.identifier.issn | 2211-3282 | - |
dc.identifier.uri | https://scholarworks.sookmyung.ac.kr/handle/2020.sw.sookmyung/160304 | - |
dc.description.abstract | Efficient and durable high-current-density bifunctional electrocatalysts are vital for cost-effective production of alkaline water electrolyzers (AWEs) on an industrial scale. However, existing commercial catalysts, such as Raney Ni which requires over 2.5 V for just 500 mA cm-2, fail to achieve high current densities with low cell voltages. In this study, we introduce a bifunctional RuP2/Ni5P4/NiMoO4 heterostructure electrocatalyst, synthesized via a facile hydrothermal method, followed by the controlled addition of ruthenium (Ru) and subsequent phosphorization. This process yielded (Ru, Ni) phosphides and NiMoO4 with a moderate weight percentage and mass loading of Ru content, approximately 1.02 wt% and 61 mu g cm-2, respectively. The synergistic effect of these phosphides and bimetallic oxides significantly improves water dissociation, as well as the hydrogen and oxygen evolution reaction (HER and OER) performances. Under industrial conditions (80 degrees C and 6 M KOH), our catalyst achieves low overpotentials of 273 mV for HER and 390 mV for OER at 2000 mA cm-2, outperforming commercial Pt/C and RuO2 catalysts. Additionally, in an AWE, our catalyst maintains a low operating voltage of 1.76 V for 1 A cm-2, with consistent performance over 100 h at 500 mA cm-2. It records an electricity consumption of 3.97 kW h Nm- 3 and an electrolyzer efficiency of 89.1%, underscoring its potential for cost-effective industrial applications. Furthermore, accelerated degradation tests under variable current loads show no significant change in cell voltage and high-frequency resistance (HFR), demonstrating robustness for intermittent energy sources. This work proposes a novel design principle for high-performance electrocatalysts, significantly reducing reliance on noble metals and offering a robust, efficient solution for industrial-scale hydrogen production. | - |
dc.language | 영어 | - |
dc.language.iso | ENG | - |
dc.publisher | ELSEVIER | - |
dc.title | A robust and highly active bimetallic phosphide/oxide heterostructure electrocatalyst for efficient industrial-scale hydrogen production | - |
dc.type | Article | - |
dc.publisher.location | 네델란드 | - |
dc.identifier.doi | 10.1016/j.nanoen.2024.109805 | - |
dc.identifier.scopusid | 2-s2.0-85195165298 | - |
dc.identifier.wosid | 001252253000001 | - |
dc.identifier.bibliographicCitation | NANO ENERGY, v.128 | - |
dc.citation.title | NANO ENERGY | - |
dc.citation.volume | 128 | - |
dc.type.docType | Article | - |
dc.description.isOpenAccess | N | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Chemistry | - |
dc.relation.journalResearchArea | Science & Technology - Other Topics | - |
dc.relation.journalResearchArea | Materials Science | - |
dc.relation.journalResearchArea | Physics | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Physical | - |
dc.relation.journalWebOfScienceCategory | Nanoscience & Nanotechnology | - |
dc.relation.journalWebOfScienceCategory | Materials Science, Multidisciplinary | - |
dc.relation.journalWebOfScienceCategory | Physics, Applied | - |
dc.subject.keywordPlus | EVOLUTION | - |
dc.subject.keywordPlus | PERFORMANCE | - |
dc.subject.keywordPlus | CATALYST | - |
dc.subject.keywordAuthor | Hydrogen Production | - |
dc.subject.keywordAuthor | Alkaline water electrolyzers | - |
dc.subject.keywordAuthor | Industrial-scale | - |
dc.subject.keywordAuthor | Electrocatalyst | - |
dc.subject.keywordAuthor | Heterostructure | - |
dc.subject.keywordAuthor | Accelerated degradation test | - |
dc.identifier.url | https://www.sciencedirect.com/science/article/pii/S2211285524005536?via%3Dihub | - |
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.
Sookmyung Women's University. Cheongpa-ro 47-gil 100 (Cheongpa-dong 2ga), Yongsan-gu, Seoul, 04310, Korea02-710-9127
Copyright©Sookmyung Women's University. All Rights Reserved.
Certain data included herein are derived from the © Web of Science of Clarivate Analytics. All rights reserved.
You may not copy or re-distribute this material in whole or in part without the prior written consent of Clarivate Analytics.