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Title: Enhanced oxidation resistance of active nanostructures via dynamic size effect

Journal Article · · Nature Communications
DOI:https://doi.org/10.1038/ncomms14459· OSTI ID:1358014
 [1];  [2];  [1];  [2];  [2];  [1];  [2];  [1];  [1];  [1];  [3];  [2]
  1. State Key Laboratory of Catalysis, CAS Center for Excellence in Nanoscience, Collaborative Innovation Center of Chemistry for Energy Materials, Dalian Institute of Chemical Physics, Chinese Academy of Sciences (China); University of Chinese Academy of Sciences, Beijing (China)
  2. State Key Laboratory of Catalysis, CAS Center for Excellence in Nanoscience, Collaborative Innovation Center of Chemistry for Energy Materials, Dalian Institute of Chemical Physics, Chinese Academy of Sciences (China)
  3. Brookhaven National Lab. (BNL), Upton, NY (United States). Chemistry Department

A major challenge limiting the practical applications of nanomaterials is that the activities of nanostructures (NSs) increase with reduced size, often sacrificing their stability in the chemical environment. Under oxidative conditions, NSs with smaller sizes and higher defect densities are commonly expected to oxidize more easily, since high-concentration defects can facilitate oxidation by enhancing the reactivity with O2 and providing a fast channel for oxygen incorporation. Here, using FeO NSs as an example, we show to the contrary, that reducing the size of active NSs can drastically increase their oxidation resistance. A maximum oxidation resistance is found for FeO NSs with dimensions below 3.2 nm. Rather than being determined by the structure or electronic properties of active sites, the enhanced oxidation resistance originates from the size-dependent structural dynamics of FeO NSs in O2. We find this dynamic size effect to govern the chemical properties of active NSs.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
Grant/Contract Number:
SC0012704; AC02-05CH11231; 21303195; 21473191; 91545204
OSTI ID:
1358014
Report Number(s):
BNL-113821-2017-JA; R&D Project: CO027; KC0302010
Journal Information:
Nature Communications, Vol. 8; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 45 works
Citation information provided by
Web of Science

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Carbon Monoxide Oxidation on Metal-Supported Monolayer Oxide Films: Establishing Which Interface is Active journal January 2018
Investigation of the Tribofilm Formation of HiPIMS Sputtered MoSx Thin Films in Different Environments by Raman Scattering journal November 2019
Investigation of the tribofilm formation of HiPIMS sputtered MoSx thin films in different environments by Raman scattering text January 2019
Carbon Monoxide Oxidation on Metal-Supported Monolayer Oxide Films: Establishing Which Interface is Active journal January 2018
Origin of nanoscale heterogeneity in the surface oxide film protecting stainless steel against corrosion journal August 2019
Enhanced saturation magnetization and stability of magnetic nanofluids based on FeCo@CoFe 2 O 4 nanoparticles journal November 2019
Interface-confined triangular FeO x nanoclusters on Pt(111) journal December 2019
Tip-enhanced Raman spectroscopy for surfaces and interfaces journal January 2017
2D oxides on metal materials: concepts, status, and perspectives journal January 2019