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Title: Perovskite nanoparticle-sensitized Ga2O3 nanorod arrays for CO detection at high temperature

Journal Article · · ACS Applied Materials and Interfaces
 [1];  [2];  [1];  [3];  [4];  [5];  [1]
  1. Univ. of Connecticut, Storrs, CT (United States)
  2. National Energy Technology Lab., Pittsburgh, PA (United States)
  3. Georgia Inst. of Technology, Atlanta, GA (United States)
  4. Brookhaven National Lab. (BNL), Upton, NY (United States)
  5. National Energy Technology Lab., Pittsburgh, PA (United States); Carnegie Mellon Univ., Pittsburgh, PA (United States)

Here, noble metal nanoparticles are extensively used for sensitizing metal oxide chemical sensors through the catalytic spillover mechanism. However, due to earth-scarcity and high cost of noble metals, finding replacements presents a great economic benefit. Besides, high temperature and harsh environment sensor applications demand material stability under conditions approaching thermal and chemical stability limits of noble metals. In this study, we employed thermally stable perovskite-type La0.8Sr0.2FeO3 (LSFO) nanoparticle surface decoration on Ga2O3 nanorod array gas sensors and discovered an order of magnitude enhanced sensitivity to carbon monoxide at 500 °C. The LSFO nanoparticle catalysts was of comparable performance to that achieved by Pt nanoparticles, with a much lower weight loading than Pt. Detailed electron microscopy and X-ray photoelectron spectroscopy studies suggested the LSFO nanoparticle sensitization effect is attributed to a spillover-like effect associated with the gas-LSFO-Ga2O3 triple-interfaces that spread the negatively charged surface oxygen ions from LSFO nanoparticles surfaces over to β-Ga2O3 nanorod surfaces with faster surface CO oxidation reactions.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC00112704
OSTI ID:
1328390
Report Number(s):
BNL-112718-2016-JA; R&D Project: 16065; 16074; KC0403020
Journal Information:
ACS Applied Materials and Interfaces, Vol. 8, Issue 14; ISSN 1944-8244
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 51 works
Citation information provided by
Web of Science

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Perovskite La 0.75 Sr 0.25 Cr 0.5 Mn 0.5 O 3−δ sensitized SnO 2 fiber-in-tube scaffold: highly selective and sensitive formaldehyde sensing journal January 2018
Layer-by-Layer Assembled Conductive Metal-Organic Framework Nanofilms for Room-Temperature Chemiresistive Sensing journal November 2017
Transparent metal-oxide nanowires and their applications in harsh electronics journal January 2019
β-Ga 2 O 3 nanorod arrays with high light-to-electron conversion for solar-blind deep ultraviolet photodetection journal January 2019
Recent advances in ABO3 perovskites: their gas-sensing performance as resistive-type gas sensors journal December 2019
Copper manganese oxide enhanced nanoarray-based monolithic catalysts for hydrocarbon oxidation journal January 2018
UV-enhanced CO sensing using Ga 2 O 3 -based nanorod arrays at elevated temperature journal January 2017
A review of Ga 2 O 3 materials, processing, and devices journal March 2018
A well-grown β-Ga 2 O 3 microrod array formed from GaOOH on a Si (100) substrate and growth mechanism study journal January 2018
Density Functional Theory Simulations of Water Adsorption and Activation on the (−201) β‐Ga 2 O 3 Surface journal April 2018
The Growth of Ga2O3 Nanowires on Silicon for Ultraviolet Photodetector journal December 2019
Metal Oxide Nanoarrays for Chemical Sensing: A Review of Fabrication Methods, Sensing Modes, and Their Inter-correlations journal April 2019
Layer-by-Layer Assembled Conductive Metal-Organic Framework Nanofilms for Room-Temperature Chemiresistive Sensing journal November 2017
Crystal Chemistry, Band-Gap Red Shift, and Electrocatalytic Activity of Iron-Doped Gallium Oxide Ceramics journal December 2019
Dynamics Contributions to the Growth Mechanism of Ga2O3 Thin Film and NWs Enabled by Ag Catalyst journal September 2019