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Simple Aqueous Preparation of High Activity and Stability NiFe Hydrous Oxide Catalysts for Water Oxidation

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dc.contributor.authorWang, Chao
dc.contributor.authorMoghaddam, Reza B.
dc.contributor.authorBrett, Michael J.
dc.contributor.authorBergens, Steven H.
dc.date.accessioned2025-05-01T12:11:32Z
dc.date.available2025-05-01T12:11:32Z
dc.date.issued2016-10-27
dc.descriptionA series of Ni1–xFex hydrous oxide nanoparticles (HO-nps, x = 0–0.5, 1) were prepared by stirring 0.1 M KOH solutions of NiCl2 and FeCl2 under air at room temperature. The resulting HO-nps can be used directly, or washed and isolated without loss of activity. The Ni1–xFex HO-nps are outstandingly active and stable toward the water oxidation reaction (WOR) in base. The Ni0.75Fe0.25 HO-np was the most active mass-normalized WOR catalyst in the series, with onset overpotential = 190 mV, Tafel slope = 24 mV dec–1, overpotential at 10 mA cm–2 = 234 mV, and loadings Ni + Fe = 0.135 mg cm–2. The catalysts were robust under long-term galvanostatic and duty-cycle testing. The Ni0.75Fe0.25 HO-np catalyst has a layered double hydroxide structure, and it appears that Fe enhances the activity of Ni toward the WOR by decreasing its electron density.
dc.identifier.doihttps://doi.org/10.7939/R3959CP7P
dc.language.isoen
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/
dc.subjectAlkaline electrolysis
dc.subjectNickel
dc.subjectWater electrolyzer
dc.subjectWater oxidation
dc.subjectIron
dc.titleSimple Aqueous Preparation of High Activity and Stability NiFe Hydrous Oxide Catalysts for Water Oxidation
dc.typehttp://purl.org/coar/resource_type/c_6501 http://purl.org/coar/version/c_970fb48d4fbd8a85
ual.jupiterAccesshttp://terms.library.ualberta.ca/public

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