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Title: Constructing hierarchical interfaces: TiO2-supported PtFe-FeOx nanowires for room temperature CO oxidation

Journal Article · · Journal of the American Chemical Society
DOI:https://doi.org/10.1021/jacs.5b07011· OSTI ID:1214513
 [1];  [1];  [2];  [1];  [3];  [1];  [4];  [5]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
  3. Zhejiang Univ. of Technology, Zhejiang (China)
  4. Univ. of Tennessee, Knoxville, TN (United States)
  5. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)

In this study, we report a facile approach to constructing catalytic active hierarchical interfaces in one-dimensional (1D) nanostructure, exemplified by the synthesis of TiO2-supported PtFe–FeOx nanowires (NWs). The hierarchical interface, constituting atomic level interactions between PtFe and FeOx within each NW and the interactions between NWs and support (TiO2), enables CO oxidation with 100% conversion at room temperature. We identify the role of the two interfaces by probing the CO oxidation reaction with isotopic labeling experiments. Both the oxygen atoms (Os) in FeOx and TiO2 participate in the initial CO oxidation, facilitating the reaction through a redox pathway. Moreover, the intact 1D structure leads to the high stability of the catalyst. After 30 h in the reaction stream, the PtFe–FeOx/TiO2 catalyst exhibits no activity decay. Our results provide a general approach and new insights into the construction of hierarchical interfaces for advanced catalysis.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC05-00OR22725; SC00112704
OSTI ID:
1214513
Alternate ID(s):
OSTI ID: 1226071
Report Number(s):
BNL-108553-2015-JA
Journal Information:
Journal of the American Chemical Society, Vol. 137, Issue 32; ISSN 0002-7863
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 80 works
Citation information provided by
Web of Science

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A Controllable Surface Etching Strategy for Well-Defined Spiny Yolk@Shell CuO@CeO 2 Cubes and Their Catalytic Performance Boost journal June 2018
Polyoxometalates as bifunctional templates: engineering metal oxides with mesopores and reactive surfaces for catalysis journal January 2019
A general one-pot strategy for the synthesis of Au@multi-oxide yolk@shell nanospheres with enhanced catalytic performance journal January 2018
Phosphomolybdic acid immobilized on ionic liquid-modified hexagonal boron nitride for oxidative desulfurization of fuel journal January 2017
Promotion effect of oxygen-containing functional groups and Fe species on Pd@graphene for CO catalytic oxidation journal January 2017
Recent Advanced Materials for Electrochemical and Photoelectrochemical Synthesis of Ammonia from Dinitrogen: One Step Closer to a Sustainable Energy Future journal September 2019
Bimetallic synergy in cobalt–palladium nanocatalysts for CO oxidation journal December 2018
Enhancing electrochemical detection of dopamine via dumbbell-like FePt–Fe 3 O 4 nanoparticles journal January 2017
Trimetallic PtPdCo mesoporous nanopolyhedra with hollow cavities journal January 2019
Application of Au–Cu nanowires fabricated by laser ablation in superfluid helium as catalysts for CO oxidation journal October 2015
Preparation of core-shell Pt@Fe 3 O 4 @SiO 2 nanostructures by oxidation of core-shell FePt@SiO 2 nanoflowers and their performance in preferential CO oxidation reaction journal October 2018
Taming interfacial electronic properties of platinum nanoparticles on vacancy-abundant boron nitride nanosheets for enhanced catalysis journal June 2017