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dc.contributor.authorJia, Yi
dc.contributor.authorZhang, Longzhou
dc.contributor.authorGao, Guoping
dc.contributor.authorChen, Hua
dc.contributor.authorWang, Bei
dc.contributor.authorZhou, Jizhi
dc.contributor.authorSoo, Mun Teng
dc.contributor.authorHong, Min
dc.contributor.authorYan, Xuecheng
dc.contributor.authorQian, Guangren
dc.contributor.authorZou, Jin
dc.contributor.authorDu, Aijun
dc.contributor.authorYao, Xiangdong
dc.date.accessioned2018-01-23T01:00:31Z
dc.date.available2018-01-23T01:00:31Z
dc.date.issued2017
dc.identifier.issn0935-9648
dc.identifier.doi10.1002/adma.201700017
dc.identifier.urihttp://hdl.handle.net/10072/341222
dc.description.abstractHerein, the authors demonstrate a heterostructured NiFe LDH-NS@DG10 hybrid catalyst by coupling of exfoliated Ni–Fe layered double hydroxide (LDH) nanosheet (NS) and defective graphene (DG). The catalyst has exhibited extremely high electrocatalytic activity for oxygen evolution reaction (OER) in an alkaline solution with an overpotential of 0.21 V at a current density of 10 mA cm−2, which is comparable to the current record (≈0.20 V in Fe–Co–Ni metal-oxide-film system) and superior to all other non-noble metal catalysts. Also, it possesses outstanding kinetics (Tafel slope of 52 mV dec−1) for the reaction. Interestingly, the NiFe LDH-NS@DG10 hybrid has also exhibited the high hydrogen evolution reaction (HER) performance in an alkaline solution (with an overpotential of 115 mV by 2 mg cm−2 loading at a current density of 20 mA cm−2) in contrast to barely HER activity for NiFe LDH-NS itself. As a result, the bifunctional catalyst the authors developed can achieve a current density of 20 mA cm−2 by a voltage of only 1.5 V, which is also a record for the overall water splitting. Density functional theory calculation reveals that the synergetic effects of highly exposed 3d transition metal atoms and carbon defects are essential for the bifunctional activity for OER and HER.
dc.description.peerreviewedYes
dc.languageEnglish
dc.language.isoeng
dc.publisherWiley Online
dc.relation.ispartofpagefrom1700017-1
dc.relation.ispartofpageto1700017-8
dc.relation.ispartofissue17
dc.relation.ispartofjournalAdvanced Materials
dc.relation.ispartofvolume29
dc.subject.fieldofresearchPhysical sciences
dc.subject.fieldofresearchChemical sciences
dc.subject.fieldofresearchPhysical properties of materials
dc.subject.fieldofresearchEngineering
dc.subject.fieldofresearchcode51
dc.subject.fieldofresearchcode34
dc.subject.fieldofresearchcode340305
dc.subject.fieldofresearchcode40
dc.titleA Heterostructure Coupling of Exfoliated Ni–Fe Hydroxide Nanosheet and Defective Graphene as a Bifunctional Electrocatalyst for Overall Water Splitting
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.facultyGriffith Sciences, Griffith School of Engineering
gro.hasfulltextNo Full Text
gro.griffith.authorYan, Xuecheng
gro.griffith.authorJia, Yi


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