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dc.contributor.authorMasud, Jahangir
dc.contributor.authorVan Nguyen, Trung
dc.contributor.authorSingh, Nirala
dc.contributor.authorMcFarland, Eric
dc.contributor.authorIkenberry, Myles
dc.contributor.authorHohn, Keith
dc.contributor.authorPan, Chun-Jern
dc.contributor.authorHwang, Bing-Joe
dc.date.accessioned2016-04-01T18:09:12Z
dc.date.available2016-04-01T18:09:12Z
dc.date.issued2015-02-10
dc.identifier.citationMasud, J., T. Van Nguyen, N. Singh, E. Mcfarland, M. Ikenberry, K. Hohn, C.-J. Pan, and B.-J. Hwang. "A RhxSy/C Catalyst for the Hydrogen Oxidation and Hydrogen Evolution Reactions in HBr." Journal of the Electrochemical Society 162.4 (2015): n. pag. doi:10.1149/2.0901504jesen_US
dc.identifier.urihttp://hdl.handle.net/1808/20617
dc.description.abstractRhodium sulfide (Rh2S3) on carbon support was synthesized by refluxing rhodium chloride with ammonium thiosulfate. Thermal treatment of Rh2S3 at high temperatures (600°C to 850°C) in presence of argon resulted in the transformation of Rh2S3 into Rh3S4, Rh17S15 and Rh which were characterized by TGA/DTA, XRD, EDX, and deconvolved XPS analyses. The catalyst particle size distribution ranged from 3 to 12 nm. Cyclic voltammetry and rotating disk electrode measurements were used to evaluate the catalytic activity for hydrogen oxidation and evolution reactions in H2SO4 and HBr solutions. The thermally treated catalysts show high activity for the hydrogen reactions. The exchange current densities (io) of the synthesized RhxSy catalysts in H2-saturated 1M H2SO4 and 1M HBr for HER and HOR were 0.9 mA/cm2 to 1.0 mA/cm2 and 0.8 to 0.9 mA/cm2, respectively. The lower io values obtained in 1M HBr solution compared to in H2SO4 might be due to the adsorption of Br− on the active surface. Stable electrochemical active surface area (ECSA) of RhxSy catalyst was obtained for CV scan limits between 0 V and 0.65 V vs. RHE. Scans with upper voltage limit beyond 0.65 V led to decreased and unreproducible ECSA measurements.en_US
dc.publisherElectrochemical Societyen_US
dc.relation.isversionofhttp://jes.ecsdl.org/content/162/4/F455.abstracten_US
dc.rightsThis is an open access article distributed under the terms of the Creative Commons Attribution 4.0 License (CC BY, http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse of the work in any medium, provided the original work is properly cited.en_US
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.titleA RhxSy/C Catalyst for the Hydrogen Oxidation and Hydrogen Evolution Reactions in HBren_US
dc.typeArticleen_US
kusw.kuauthorVan Nguyen, Trung
kusw.kudepartmentChemical & Petroleum Engren_US
dc.identifier.doi10.1149/2.0901504jesen_US
dc.identifier.orcidhttps://orcid.org/0000-0001-9878-1084
kusw.oaversionScholarly/refereed, publisher versionen_US
kusw.oapolicyThis item meets KU Open Access policy criteria.en_US
dc.rights.accessrightsopenAccess


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This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 License (CC BY, http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse of the work in any medium, provided the original work is properly cited.
Except where otherwise noted, this item's license is described as: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 License (CC BY, http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse of the work in any medium, provided the original work is properly cited.