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Title: In situ atomic-scale imaging of the metal/oxide interfacial transformation

Journal Article · · Nature Communications

Directly probing structure dynamics at metal/oxide interfaces has been a major challenge due to their buried nature.Using environmental transmission electron microscopy,here we report observations of the in-place formation of Cu2O/Cu interfaces via the oxidation of Cu, and subsequently probe the atomic mechanisms by which interfacial transformation and grain rotation occur at the interfaces during reduction in an H2 gas environment. The Cu2O→Cu transformation is observed to occur initially along the Cu2O/Cu interface in a layer-by-layer manner.The accumulation of oxygen vacancies at the Cu2O/Cu interface drives the collapse of the Cu2O lattice near the interface region, which results in a tilted Cu2O/Cu interface with concomitant Cu2O island rotation. Lastly, these results provide unprecedented microscopic detail regarding the redox reactions of supported oxides,which differs fundamentally from the reduction of bulk or isolated oxides that requires the formation of new interfaces between the parent oxide and the reduced phase.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0012704
OSTI ID:
1438307
Report Number(s):
BNL-205663-2018-JAAM
Journal Information:
Nature Communications, Vol. 8, Issue 1; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 56 works
Citation information provided by
Web of Science

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Cited By (8)

Interface dominated cooperative nanoprecipitation in interstitial alloys journal October 2018
Photocatalytic hydrogen evolution activity of Co/CoO hybrid structures: a first-principles study on the Co layer thickness effect journal January 2019
Excellent degradation performance of 3D hierarchical nanoporous structures of copper towards organic pollutants journal January 2018
In situ environmental TEM observation of two-stage shrinking of Cu 2 O islands on Cu(100) during methanol reduction journal January 2020
FeS 2 /CoS 2 Interface Nanosheets as Efficient Bifunctional Electrocatalyst for Overall Water Splitting journal May 2018
Surface-reaction induced structural oscillations in the subsurface journal January 2020
Tuning Interfacial Cu‐O Atomic Structures for Enhanced Catalytic Applications journal August 2019
Atomic‐Scale Mechanism of Unidirectional Oxide Growth journal November 2019

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