Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 197, Issue -, Pages 81-86Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2014.02.079
Keywords
Self-heating effect; Gasochromic coloration; Pt-coated WO3 nanowire; Heat production rate; Heat dissipation rate
Funding
- National Natural Science Foundation of China [11004153]
- Guangdong Natural Science Foundation [S2011040000636]
- Guangdong University Talent Introduction of Special Funds [Yue Cai-Jiao [2011]431]
- Foundation for Distinguished Young Talents in Higher Education of Guangdong [LYM11123]
- Science Foundation for Young Teachers of Wuyi University [2013zk05]
- Guangdong High Education Research Center of Light Chemical Cleaner Production Engineering Technology
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A self-heating effect has been observed in the gasochromic coloration of Pt coated WO3 (Pt-WO3) nanowire films, and its temperature rise rate is found to be strongly dependent on the initial temperature and the time of the sample exposed to air. X-ray photoelectron spectroscopy is applied to investigate the catalyst poisoning and reactivation of Pt-WO3 nanowires in air, and the results indicate that the Pt nanoparticles can be poisoned by chemisorbed oxygen atoms in air, causing the self-heating effect to be suppressed at room temperature. The mechanism response for the occurrence of the self-heating effect has also been discussed in depth. (C) 2014 Elsevier B.V. All rights reserved.
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