Temperature-dependent H{sub 2} gas-sensing properties of fabricated Pd nanowires using highly oriented pyrolytic graphite

Journal Article · Wed Sep 15 00:00:00 EDT 2010 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3481430· OSTI ID:21476452

Sennik, Erdem; Kilinc, Necmettin ^[1]; Oeztuerk, Zafer Ziya ^[1]

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1. Department of Physics, Gebze Institute of Technology, Science Faculty, Kocaeli 41400 (Turkey)

Horizontal palladium (Pd) nanowires and Pd nanoparticles were successfully fabricated directly on highly oriented pyrolytic graphite depending on the electrodeposition time using palladium nitrate [Pd(NO{sub 2}){sub 3}] solution at room temperature, and the temperature-dependent hydrogen (H{sub 2}) sensing properties of these structures were investigated in the concentration range of 50-5000 ppm. Pd nanowires and Pd nanoparticles were fabricated on a graphite surface by applying triple-pulsed potential with varying the electrodeposition time from 400 to 600 s. The fabricated Pd nanowires were characterized by scanning electron microscopy and energy-dispersive x-ray spectroscopy. It was found that the nanowire arrays were continuous, parallel to each other and ordered after an electrodeposition time of 600 s. The diameters of the Pd nanowires and Pd nanoparticles are observed in the range of 70-180 nm. The H{sub 2} sensing properties of these structures were determined with variation in resistance measurements. It was observed that the limit of detection is lower than 50 ppm H{sub 2}, the sensor response was approximately 2% for 1000 ppm H{sub 2} at room temperature, and the sensor response was decreased with increasing temperature.

• OSTI ID: 21476452
• Journal Information: Journal of Applied Physics, Vol. 108, Issue 5; Other Information: DOI: 10.1063/1.3481430; (c) 2010 American Institute of Physics; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
36 MATERIALS SCIENCE
ELECTRODEPOSITION
GRAPHITE
HYDROGEN
NITROGEN DIOXIDE
PALLADIUM
PALLADIUM NITRATES
PARTICLES
QUANTITATIVE CHEMICAL ANALYSIS
QUANTUM WIRES
SCANNING ELECTRON MICROSCOPY
SENSORS
SURFACES
TEMPERATURE DEPENDENCE
X-RAY FLUORESCENCE ANALYSIS
X-RAY SPECTROSCOPY
CARBON
CHALCOGENIDES
CHEMICAL ANALYSIS
DEPOSITION
ELECTROLYSIS
ELECTRON MICROSCOPY
ELEMENTS
LYSIS
METALS
MICROSCOPY
MINERALS
NANOSTRUCTURES
NITRATES
NITROGEN COMPOUNDS
NITROGEN OXIDES
NONDESTRUCTIVE ANALYSIS
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PALLADIUM COMPOUNDS
PLATINUM METALS
SPECTROSCOPY
SURFACE COATING
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
X-RAY EMISSION ANALYSIS