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Title: ZnO/perovskite core–shell nanorod array based monolithic catalysts with enhanced propane oxidation and material utilization efficiency at low temperature

Journal Article · · Catalysis Today
 [1];  [1];  [2];  [1];  [1];  [3];  [1]
  1. Univ. of Connecticut, Storrs, CT (United States). Department of Materials Science and Engineering & Institute of Materials Science
  2. Univ. of Connecticut, Storrs, CT (United States). Department of Chemistry
  3. Univ. of Connecticut, Storrs, CT (United States). Department of Materials Science and Engineering & Institute of Materials Science and Department of Chemistry
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Here, a hydrothermal strategy combined with colloidal deposition synthesis was successfully used to grow ZnO/perovskite (LaBO3, B=Mn, Co, Ni) core-shell nanorod arrays within three dimensional (3-D) honeycomb cordierite substrates. A facile sonication assisted colloidal wash coating process is able to coat a uniformly dispersed perovskite nanoparticles onto the large scale ZnO nanorod arrays rooted on the channel surfaces of the 3D cordierite substrate achieved by hydrothermal synthesis. Compared to traditional wash-coated perovskite catalysts, an enhanced catalytic performance was observed for propane oxidation with 25°C lower light-off temperature than wash-coated perovskite catalyst of similar LaMnO3 loading (4.3mg). Temperature programmed reduction and desorption under H2 and O2 atmosphere, respectively, were used to study the reducibility and oxygen activity of these core-shell nanorod arrays based monolithic catalysts, revealing a catalytic activity sequence of LaCoO3>LaMnO3>La2NiO4 at the initial stage of catalytic reaction. The good dispersion and size control in La-based perovskite nanoparticles and their interfaces to ZnO nanorod arrays support may contribute to the enhancement of catalytic performance. Lastly, this work may provide a new type of Pt-group metals (PGM) free catalysts with improved catalytic performance for hydrocarbon oxidations at low temperatures.

Research Organization:
Univ. of Connecticut, Storrs, CT (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Geothermal Technologies Office
Grant/Contract Number:
EE0006854; CBET-1344792
OSTI ID:
1430252
Alternate ID(s):
OSTI ID: 1257492
Journal Information:
Catalysis Today, Vol. 258, Issue P2; ISSN 0920-5861
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 30 works
Citation information provided by
Web of Science

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Cited By (6)

Copper manganese oxide enhanced nanoarray-based monolithic catalysts for hydrocarbon oxidation journal January 2018
Nanostructured cerium oxide: preparation, characterization, and application in energy and environmental catalysis journal November 2016
Monolithic LaBO 3 (B=Mn, Co or Ni)/Co 3 O 4 /cordierite Catalysts for o ‐Xylene Combustion journal May 2019
Robust and well-controlled TiO 2 –Al 2 O 3 binary nanoarray-integrated ceramic honeycomb for efficient propane combustion journal January 2019
Perovskite catalysts for methane combustion: applications, design, effects for reactivity and partial oxidation journal August 2019
Mesoporous Perovskite Nanotube-Array Enhanced Metallic-State Platinum Dispersion for Low Temperature Propane Oxidation journal March 2018

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Related Subjects

36 MATERIALS SCIENCE
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Metal oxide
Core–shell nanorod arrays
Monolithic catalyst
Heterogeneous catalysis
Low temperature propane oxidation