dc.contributor.author
Chen, Ziliang
dc.contributor.author
Yang, Hongyuan
dc.contributor.author
Mebs, Stefan
dc.contributor.author
Dau, Holger
dc.contributor.author
Driess, Matthias
dc.contributor.author
Wang, Zhaowu
dc.contributor.author
Kang, Zhenhui
dc.contributor.author
Menezes, Prashanth W.
dc.date.accessioned
2023-04-12T07:56:33Z
dc.date.available
2023-04-12T07:56:33Z
dc.identifier.uri
https://refubium.fu-berlin.de/handle/fub188/38301
dc.identifier.uri
http://dx.doi.org/10.17169/refubium-38020
dc.description.abstract
A hydrogen processing strategy is developed to enable bulk LaNi5 to attain high activity and long-term stability toward the electrocatalytic oxygen evolution reaction (OER). By a combination of in situ Raman and quasi in situ X-ray absorption (XAS) spectra, secondary-electron-excited scanning transmission electron microscopy (STEM) patterns as well as the Rietveld method and density functional theory (DFT) calculations, it is discovered that hydrogen-induced lattice distortion, grain refinement, and particle cracks dictate the effective reconstruction of the LaNi5 surface into a porous hetero-nanoarchitecture composed of uniformly confined active γ-NiOOH nanocrystals by La(OH)3 layer in the alkaline OER process. This significantly optimizes the charge transfer, structural integrity, active-site exposure, and adsorption energy toward the reaction intermediates. Benefiting from these merits, the overpotential (322 mV) at 100 mA cm−2 for the hydrogen-processed OER catalyst deposited on nickel foam is reduced by 104 mV as compared to the original phase. Notably, it exhibits remarkable stability for 10 days at an industrial-grade current density of more than 560 mA cm−2 in alkaline media.
en
dc.format.extent
12 Seiten
dc.rights.uri
https://creativecommons.org/licenses/by/4.0/
dc.subject
heterostructures
en
dc.subject
hydrogen storage intermetallics
en
dc.subject
oxygen evolution reaction
en
dc.subject
phase reconstruction
en
dc.subject
rare-earth metals
en
dc.subject.ddc
500 Naturwissenschaften und Mathematik::540 Chemie::540 Chemie und zugeordnete Wissenschaften
dc.title
Reviving Oxygen Evolution Electrocatalysis of Bulk La–Ni Intermetallics via Gaseous Hydrogen Engineering
dc.type
Wissenschaftlicher Artikel
dcterms.bibliographicCitation.articlenumber
2208337
dcterms.bibliographicCitation.doi
10.1002/adma.202208337
dcterms.bibliographicCitation.journaltitle
Advanced Materials
dcterms.bibliographicCitation.number
11
dcterms.bibliographicCitation.volume
35
dcterms.bibliographicCitation.url
https://doi.org/10.1002/adma.202208337
refubium.affiliation
Physik
refubium.resourceType.isindependentpub
no
dcterms.accessRights.openaire
open access
dcterms.isPartOf.eissn
1521-4095
refubium.resourceType.provider
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