Single wall carbon nanotubes loaded with Pd and NiPd nanoparticles for H2 sensing at room temperature

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Title: Single wall carbon nanotubes loaded with Pd and NiPd nanoparticles for H2 sensing at room temperature
Authors: García Aguilar, Jaime | Miguel García, Izaskun | Berenguer-Murcia, Ángel | Cazorla-Amorós, Diego
Research Group/s: Materiales Carbonosos y Medio Ambiente
Center, Department or Service: Universidad de Alicante. Departamento de Química Inorgánica | Universidad de Alicante. Instituto Universitario de Materiales
Keywords: Single wall carbon nanotubes | Pd and NiPd nanoparticles | H2 sensors
Knowledge Area: Química Inorgánica
Issue Date: Jan-2014
Publisher: Elsevier
Citation: Carbon. 2014, 66: 599-611. doi:10.1016/j.carbon.2013.09.047
Abstract: Pd and bimetallic Ni50Pd50 nanoparticles protected by polyvinylpyrrolidone (PVP) have been synthesized by the reduction-by-solvent method and deposited on single wall carbon nanotubes (SWCNTs) to be tested as H2 sensors. The SWCNTs were deposited by drop casting from different suspensions. The Pd nanoparticles-based sensors show a very reproducible performance with good sensitivity and very low response times (few seconds) for different H2 concentrations, ranging from 0.2% to 5% vol. H2 in air at atmospheric pressure. The influence of the metal nanoparticle composition, the quality of SWCNTs suspension and the metal loading have been studied, observing that all these parameters play an important role in the H2 sensor performance. Evidence for water formation during the H2 detection on Pd nanoparticles has been found, and its repercussion on the behaviour of the assembled sensors is discussed. The sensor preparation procedure detailed in this work has proven to be simple and reproducible to prepare cost-effective and highly efficient H2 sensors that perform very well under real application conditions.
Sponsor: We thank the MINECO, Generalitat Valenciana and FEDER (Projects CTQ2012-31762 and PROMETEO/2009/047) for financial support. A.B.M. thanks the Spanish Ministry Science and Innovation for a Ramón y Cajal fellowship (RyC 2009-03913). Jaime Garcia Aguilar and Izaskun Miguel García also thank the University of Alicante for their fellowships.
ISSN: 0008-6223 (Print) | 1873-3891 (Online)
DOI: 10.1016/j.carbon.2013.09.047
Language: eng
Type: info:eu-repo/semantics/article
Peer Review: si
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Appears in Collections:INV - MCMA - Artículos de Revistas

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