Catalytic activity and thermal stability of arc plasma deposited Pt nano-particles on CeO2-Al2O3

Young Eun Jeong, Pullur Anil Kumar, Hee Lack Choi, Kwan Young Lee, Heon Phil Ha

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

In this study, catalytic activity and thermal stability of the arc plasma deposited (APD) Pt nano-particles on Al2O3 and CeO2-Al2O3 were compared with that of the conventionally prepared Pt/Al2O3. All the catalysts were characterized by BET-surface area, transmission electron microscopy, X-ray photoelectron spectroscopy, CO-pulse chemisorption, H2-temperarture programmed reduction and X-ray absorption near edge spectroscopy. Through the quantum chemical calculations of different metal oxide support, CeO2 was identified as a suitable anchoring material with high energy level between the Pt species (Pt0 and PtOx) on ceria. Subsequently, the results of XPS and XANES revealed the presence of abundant Pt0 metal species in APD catalysts. The addition of ceria to Al2O3 support enhanced the dispersion of Pt nano-particles. The H2-TPR of Pt/CeO2-Al2O3 (APD) catalyst showed high-temperature reduction peaks corresponding to the interaction of Pt with ceria on alumina by Pt-O-Ce. Consequently, the Pt nano-particles deposited on CeO2-Al2O3 by APD attained strong thermal resistance at high temperatures. In addition, superior catalytic activities for CO and C3H6 oxidation and NOx reduction were obtained for the Pt/CeO2. Al2O3 (APD) catalyst.

Original languageEnglish
Pages (from-to)8494-8501
Number of pages8
JournalJournal of Nanoscience and Nanotechnology
Volume15
Issue number11
DOIs
Publication statusPublished - 2015 Nov 1

Fingerprint

plasma jets
catalytic activity
Catalyst activity
Thermodynamic stability
thermal stability
Hot Temperature
Cerium compounds
Plasmas
catalysts
Catalysts
Carbon Monoxide
X ray photoelectron spectroscopy
Metals
Photoelectron Spectroscopy
Temperature
Aluminum Oxide
X ray absorption
thermal resistance
Chemisorption
Transmission Electron Microscopy

Keywords

  • APD
  • Ceria
  • Pt nano-particles
  • QCC
  • TEM
  • XANES

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Chemistry(all)
  • Materials Science(all)
  • Bioengineering
  • Biomedical Engineering

Cite this

Catalytic activity and thermal stability of arc plasma deposited Pt nano-particles on CeO2-Al2O3 . / Jeong, Young Eun; Kumar, Pullur Anil; Choi, Hee Lack; Lee, Kwan Young; Ha, Heon Phil.

In: Journal of Nanoscience and Nanotechnology, Vol. 15, No. 11, 01.11.2015, p. 8494-8501.

Research output: Contribution to journalArticle

Jeong, Young Eun ; Kumar, Pullur Anil ; Choi, Hee Lack ; Lee, Kwan Young ; Ha, Heon Phil. / Catalytic activity and thermal stability of arc plasma deposited Pt nano-particles on CeO2-Al2O3 In: Journal of Nanoscience and Nanotechnology. 2015 ; Vol. 15, No. 11. pp. 8494-8501.
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AB - In this study, catalytic activity and thermal stability of the arc plasma deposited (APD) Pt nano-particles on Al2O3 and CeO2-Al2O3 were compared with that of the conventionally prepared Pt/Al2O3. All the catalysts were characterized by BET-surface area, transmission electron microscopy, X-ray photoelectron spectroscopy, CO-pulse chemisorption, H2-temperarture programmed reduction and X-ray absorption near edge spectroscopy. Through the quantum chemical calculations of different metal oxide support, CeO2 was identified as a suitable anchoring material with high energy level between the Pt species (Pt0 and PtOx) on ceria. Subsequently, the results of XPS and XANES revealed the presence of abundant Pt0 metal species in APD catalysts. The addition of ceria to Al2O3 support enhanced the dispersion of Pt nano-particles. The H2-TPR of Pt/CeO2-Al2O3 (APD) catalyst showed high-temperature reduction peaks corresponding to the interaction of Pt with ceria on alumina by Pt-O-Ce. Consequently, the Pt nano-particles deposited on CeO2-Al2O3 by APD attained strong thermal resistance at high temperatures. In addition, superior catalytic activities for CO and C3H6 oxidation and NOx reduction were obtained for the Pt/CeO2. Al2O3 (APD) catalyst.

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