Palladium Nanoparticles Decorated Single-Walled Carbon Nanotube Hydrogen Sensor

Mubeen, Syed; Zhang, Ting; Yoo, Bongyoung; Deshusses, Marc A.; Myung, Nosang V.

doi:10.1021/jp067716m

Cited by 373 publications

(235 citation statements)

References 19 publications

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“…Response times and recovery times obtained for the samples are in good agreement [17,19,20,21,23] or lower [40] than those found for similar devices in other works.…”

Section: Tests In Synthetic Airsupporting

confidence: 86%

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

García-Aguilar

Miguel-García

Berenguer-Murcia

et al. 2014

Carbon

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Pd and bimetallic Ni 50 Pd 50 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 H 2 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 H 2 concentrations, ranging from 0.2 to 5 % vol. H 2 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 H 2 sensor performance. Evidence for water formation during the H 2 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 H 2 sensors that perform very well under real application conditions. * Corresponding author. Fax: +34 965 903454 E-mail: a.berenguer@ua.es (Á. Berenguer-Murcia) 2 1. Introduction.

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“…Response times and recovery times obtained for the samples are in good agreement [17,19,20,21,23] or lower [40] than those found for similar devices in other works.…”

Section: Tests In Synthetic Airsupporting

confidence: 86%

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

García-Aguilar

Miguel-García

Berenguer-Murcia

et al. 2014

Carbon

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“…per additional ppm of H 2 . Hydrogen sensitive CNT transistors are created by evaporating or electrodepositing non-continuous Pd beads onto a CNT film [10][11][12]. Upon exposure to H 2 , the workfunction change of Pd causes an increase in resistance of the CNT.…”

Section: Introductionmentioning

confidence: 99%

“…Upon exposure to H 2 , the workfunction change of Pd causes an increase in resistance of the CNT. Kong et al reported a sensor based on this principle with a LOD below 40 ppm [11] while Mubeen et al reported a sensitivity of 0.42%/ppm up to 1000 ppm H 2 concentration [12]. Nano-cluster-based H 2 sensors take advantage of the H 2 -induced lattice expansion (HILE) in the Pd lattice, which causes the metal particles to swell and consequently fill open junctions in the cluster, increasing its conductance.…”

Section: Introductionmentioning

confidence: 99%

Palladium/silicon nanowire Schottky barrier-based hydrogen sensors

Skucha

Fan

Jeon

et al. 2010

Sensors and Actuators B: Chemical

129

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a b s t r a c tThis work presents the design, fabrication, and characterization of a hydrogen sensor based on a palladium/nanowire Schottky barrier field-effect transistor that operates at room temperature. The fabricated sensor consists of boron-doped silicon nanowire arrays that are contact printed on top of a SiO 2 /Si substrate with subsequently evaporated Pd contacts. The fabrication process is compatible with post-CMOS and plastic substrate integration as it can be completed at temperatures below 150• C with good yield and repeatability. The sensor can reliably and reversibly detect H 2 concentrations in the range from 3 ppm to 5% and has a sensitivity of 6.9%/ppm at 1000 ppm. A response distinguishable from drift and noise is produced in less than 5 s for H 2 concentrations over 1000 ppm and less than 30 s for concentrations over 100 ppm. The sensor settles to 90% of the final signal value in about 1 h at lower concentrations and less than 1 min at 10,000 ppm H 2 . Drift over an 87-h measurement period is below 5 ppm H 2 concentration.

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“…Particle size and distribution also vary with the amount of Pd on the tube wall surface thus leading to different nanostructures of Pd NPs. [40][41][42][43][44][45][46] Therefore, significant electro-catalytic activity should be assessed under the premise of minimizing the consumption of Pd precursors. The conversion of Pd precursor and the final Pd loading on CNTs should be simultaneously considered in order to obtain the highest specific activity of Pd and to meet the economic requirement.…”

mentioning

confidence: 99%

Multiwalled Carbon Nanotubes Composited with Palladium Nanocatalysts for Highly Efficient Ethanol Oxidation

Ding

Wei

et al. 2015

J. Electrochem. Soc.

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Carboxyl multi-walled carbon nanotubes (MWNTs-COOH) decorated with different palladium (Pd) nanoparticle loadings were synthesized by thermally decomposing different amounts of palladium acetylacetonate (Pd(acac) 2 ) in a refluxing xylene solution with a fixed amount of dispersed MWNTs-COOH. The increased ratio of D band/G band and the decreased area ratio of oxygen containing groups (COOH, C-O and C=O) to C-C group suggested an increased occupation of defects on MWNTs. Transmission electron microscope (TEM) revealed different distributions of Pd NPs on the MWNTs with the variation of Pd(acac) 2 amount and the particle size increased with increasing the Pd loading. A relatively higher conversion of Pd(acac) 2 to Pd (76.21%) was achieved when the initial precursor ratio of Pd(acac) 2 to MWNTs was 2 : 1 (product denotes as Pd/MWNTs-(2:1)). The Pd/MWNTs-2:1 catalysts were demonstrated to exhibit the most efficient performance toward ethanol oxidation reaction (EOR) among all the precursor ratios, which is evaluated by the highest Pd mass-based peak current density (1.23 A/mg Pd ) and stable current density (0.175 A/mg Pd ) in cyclic voltammetry (CV) and chronoamperometry (CA). In addition, both reduced charge-transfer resistance and increased reaction kinetics with increasing the Pd loading were obtained from electrochemical impedance spectroscopy (EIS) and Tafel characterization.

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Palladium Nanoparticles Decorated Single-Walled Carbon Nanotube Hydrogen Sensor

Cited by 373 publications

References 19 publications

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

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

Palladium/silicon nanowire Schottky barrier-based hydrogen sensors

Multiwalled Carbon Nanotubes Composited with Palladium Nanocatalysts for Highly Efficient Ethanol Oxidation

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