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Article: Blending Cr2O3 into a NiO-Ni Electrocatalyst for Sustained Water Splitting

TitleBlending Cr<inf>2</inf>O<inf>3</inf> into a NiO-Ni Electrocatalyst for Sustained Water Splitting
Authors
Keywordschromium oxide
electrocatalysts
hydrogen-evolution reaction
sustainable chemistry
water splitting
Issue Date2015
Citation
Angewandte Chemie - International Edition, 2015, v. 54, n. 41, p. 11989-11993 How to Cite?
AbstractThe rising H2 economy demands active and durable electrocatalysts based on low-cost, earth-abundant materials for water electrolysis/photolysis. Here we report nanoscale Ni metal cores over-coated by a Cr2O3-blended NiO layer synthesized on metallic foam substrates. The Ni@NiO/Cr2O3 triphase material exhibits superior activity and stability similar to Pt for the hydrogen-evolution reaction in basic solutions. The chemically stable Cr2O3 is crucial for preventing oxidation of the Ni core, maintaining abundant NiO/Ni interfaces as catalytically active sites in the heterostructure and thus imparting high stability to the hydrogen-evolution catalyst. The highly active and stable electrocatalyst enables an alkaline electrolyzer operating at 20 mA cm-2 at a voltage lower than 1.5 V, lasting longer than 3 weeks without decay. The non-precious metal catalysts afford a high efficiency of about 15 % for light-driven water splitting using GaAs solar cells.
Persistent Identifierhttp://hdl.handle.net/10722/334944
ISSN
2023 Impact Factor: 16.1
2023 SCImago Journal Rankings: 5.300
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorGong, Ming-
dc.contributor.authorZhou, Wu-
dc.contributor.authorKenney, Michael James-
dc.contributor.authorKapusta, Rich-
dc.contributor.authorCowley, Sam-
dc.contributor.authorWu, Yingpeng-
dc.contributor.authorLu, Bingan-
dc.contributor.authorLin, Meng Chang-
dc.contributor.authorWang, Di Yan-
dc.contributor.authorYang, Jiang-
dc.contributor.authorHwang, Bing Joe-
dc.contributor.authorDai, Hongjie-
dc.date.accessioned2023-10-20T06:51:54Z-
dc.date.available2023-10-20T06:51:54Z-
dc.date.issued2015-
dc.identifier.citationAngewandte Chemie - International Edition, 2015, v. 54, n. 41, p. 11989-11993-
dc.identifier.issn1433-7851-
dc.identifier.urihttp://hdl.handle.net/10722/334944-
dc.description.abstractThe rising H2 economy demands active and durable electrocatalysts based on low-cost, earth-abundant materials for water electrolysis/photolysis. Here we report nanoscale Ni metal cores over-coated by a Cr2O3-blended NiO layer synthesized on metallic foam substrates. The Ni@NiO/Cr2O3 triphase material exhibits superior activity and stability similar to Pt for the hydrogen-evolution reaction in basic solutions. The chemically stable Cr2O3 is crucial for preventing oxidation of the Ni core, maintaining abundant NiO/Ni interfaces as catalytically active sites in the heterostructure and thus imparting high stability to the hydrogen-evolution catalyst. The highly active and stable electrocatalyst enables an alkaline electrolyzer operating at 20 mA cm-2 at a voltage lower than 1.5 V, lasting longer than 3 weeks without decay. The non-precious metal catalysts afford a high efficiency of about 15 % for light-driven water splitting using GaAs solar cells.-
dc.languageeng-
dc.relation.ispartofAngewandte Chemie - International Edition-
dc.subjectchromium oxide-
dc.subjectelectrocatalysts-
dc.subjecthydrogen-evolution reaction-
dc.subjectsustainable chemistry-
dc.subjectwater splitting-
dc.titleBlending Cr<inf>2</inf>O<inf>3</inf> into a NiO-Ni Electrocatalyst for Sustained Water Splitting-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1002/anie.201504815-
dc.identifier.scopuseid_2-s2.0-84942825271-
dc.identifier.volume54-
dc.identifier.issue41-
dc.identifier.spage11989-
dc.identifier.epage11993-
dc.identifier.eissn1521-3773-
dc.identifier.isiWOS:000363396000015-

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