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dc.contributor.authorWan, Zixia
dc.contributor.authorYu, Hongbo
dc.contributor.authorHe, Qiuting
dc.contributor.authorHu, Yan
dc.contributor.authorYan, Puxuan
dc.contributor.authorShao, Xue
dc.contributor.authorIsimjan, Tayirjan T.
dc.contributor.authorZhang, Bing
dc.contributor.authorYang, Xiulin
dc.date.accessioned2020-08-12T06:05:48Z
dc.date.available2020-08-12T06:05:48Z
dc.date.issued2020-07-27
dc.date.submitted2020-04-25
dc.identifier.citationWan, Z., Yu, H., He, Q., Hu, Y., Yan, P., Shao, X., … Yang, X. (2020). In-situ growth and electronic structure modulation of urchin-like Ni–Fe oxyhydroxide on nickel foam as robust bifunctional catalysts for overall water splitting. International Journal of Hydrogen Energy. doi:10.1016/j.ijhydene.2020.06.180
dc.identifier.issn0360-3199
dc.identifier.doi10.1016/j.ijhydene.2020.06.180
dc.identifier.urihttp://hdl.handle.net/10754/664559
dc.description.abstractThe rational design of non-precious-metal bifunctional catalysts of oxygen and hydrogen evolution reactions that generate a high current density and stability at low over potentials is of great significance in the field of water electrolysis. Herein, we report a facile and controllable method for the in-situ growth of urchin-like FeOOH–NiOOH catalyst on Ni foam (FeOOH–NiOOH/NF). X-ray photoelectron spectroscopy confirms that the proportion of Ni and Fe species with high valence state gradually increase with the extension of growth time. Electrochemical studies have shown that the optimized FeOOH–NiOOH/NF-24 h and −12 h catalysts demonstrate excellent electrochemical activity and stability in oxygen/hydrogen evolution reactions. Moreover, the cell voltage is reduced around 0.15 V at high current density (0.5–1.0 A cm−2) as compared to the state-of the art RuO2/NF(+)||Pt–C/NF(−) system, far better than most of the previously reported catalysts. The cost analyst revealed that using FeOOH–NiOOH/NF catalyst as both electrodes could potentially reduce the price of H2 around 7% compared with traditional industrial electrolyzers. These excellent electrocatalytic properties can be attributed to the unique urchin-like structure and the synergy between Ni and Fe species, which can not only provide more active sites and accelerate electron transfer, but also promote electrolyte transport and gas emission.
dc.description.sponsorshipThis work has been supported by the National Natural Science Foundation of China (no. 21965005), Natural Science Foundation of Guangxi Province (2018JJA120134, 2018GXNSFAA281220), Project of High-Level Talents of Guangxi (F-KA18015, 2018ZD004).
dc.publisherElsevier BV
dc.relation.urlhttps://linkinghub.elsevier.com/retrieve/pii/S036031992032365X
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in International Journal of Hydrogen Energy. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in International Journal of Hydrogen Energy, [, , (2020-07-27)] DOI: 10.1016/j.ijhydene.2020.06.180 . © 2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.titleIn-situ growth and electronic structure modulation of urchin-like Ni–Fe oxyhydroxide on nickel foam as robust bifunctional catalysts for overall water splitting
dc.typeArticle
dc.contributor.departmentKAUST Solar Center (KSC)
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalInternational Journal of Hydrogen Energy
dc.rights.embargodate2021-07-27
dc.eprint.versionPost-print
dc.contributor.institutionGuangxi Key Laboratory of Low Carbon Energy Materials, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin, 541004, China
dc.contributor.institutionNational Institute of Clean-and-Low-Carbon Energy, Future Science City, Changping Dist., Beijing, 100085, China
kaust.personIsimjan, Tayirjan T.
dc.date.accepted2020-06-19
dc.identifier.eid2-s2.0-85088781046
dc.date.published-online2020-07-27
dc.date.published-print2020-09


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