Hydrogen sensing of nanoporous palladium films supported by anodic aluminum oxides

Dongyan Ding; Zhi Chen; Chi Lu

doi:10.1016/j.snb.2006.02.007

Hydrogen sensing of nanoporous palladium films supported by anodic aluminum oxides

Dongyan Ding, Zhi Chen, Chi Lu

Research output: Contribution to journal › Article › peer-review

58 Scopus citations

Abstract

Nanoporous Pd films supported by porous anodic aluminum oxides (AAOs) were investigated regarding their performance in detecting hydrogen gas with concentrations up to 1% in nitrogen at room temperature. Compared with dense Pd films that usually have very slow responses, nanoporous Pd films based on AAOs were found to have a quick and reversible response due to their enhanced absorption and disorption of hydrogen. Using thinner nanoporous films, concentrations of hydrogen as low as 250 ppm can be detected and a much higher sensitivity, up to 12% resistance variation, was obtained. Two competing hydrogen-sensing processes, the phase-induced increase of film resistance and the break-junction-induced decrease of film resistance, were found in the nanoporous Pd films upon absorption of hydrogen.

Original language	English
Pages (from-to)	182-186
Number of pages	5
Journal	Sensors and Actuators, B: Chemical
Volume	120
Issue number	1
DOIs	https://doi.org/10.1016/j.snb.2006.02.007
State	Published - Dec 14 2006

Bibliographical note

Funding Information:
This work was supported by National Science Foundation (EPSCOR0447479), Department of Energy (DE-FG02-00ER4582 and DE-FG26-04NT42171), and Army Research Laboratory (W911NF-04-2-0023).

Keywords

Hydrogen sensor
Palladium
Porous nanofilm
Resistance

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Instrumentation
Condensed Matter Physics
Surfaces, Coatings and Films
Metals and Alloys
Electrical and Electronic Engineering
Materials Chemistry

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10.1016/j.snb.2006.02.007

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title = "Hydrogen sensing of nanoporous palladium films supported by anodic aluminum oxides",

abstract = "Nanoporous Pd films supported by porous anodic aluminum oxides (AAOs) were investigated regarding their performance in detecting hydrogen gas with concentrations up to 1% in nitrogen at room temperature. Compared with dense Pd films that usually have very slow responses, nanoporous Pd films based on AAOs were found to have a quick and reversible response due to their enhanced absorption and disorption of hydrogen. Using thinner nanoporous films, concentrations of hydrogen as low as 250 ppm can be detected and a much higher sensitivity, up to 12% resistance variation, was obtained. Two competing hydrogen-sensing processes, the phase-induced increase of film resistance and the break-junction-induced decrease of film resistance, were found in the nanoporous Pd films upon absorption of hydrogen.",

keywords = "Hydrogen sensor, Palladium, Porous nanofilm, Resistance",

author = "Dongyan Ding and Zhi Chen and Chi Lu",

note = "Funding Information: This work was supported by National Science Foundation (EPSCOR0447479), Department of Energy (DE-FG02-00ER4582 and DE-FG26-04NT42171), and Army Research Laboratory (W911NF-04-2-0023). ",

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T1 - Hydrogen sensing of nanoporous palladium films supported by anodic aluminum oxides

AU - Ding, Dongyan

AU - Chen, Zhi

AU - Lu, Chi

N1 - Funding Information: This work was supported by National Science Foundation (EPSCOR0447479), Department of Energy (DE-FG02-00ER4582 and DE-FG26-04NT42171), and Army Research Laboratory (W911NF-04-2-0023).

PY - 2006/12/14

Y1 - 2006/12/14

N2 - Nanoporous Pd films supported by porous anodic aluminum oxides (AAOs) were investigated regarding their performance in detecting hydrogen gas with concentrations up to 1% in nitrogen at room temperature. Compared with dense Pd films that usually have very slow responses, nanoporous Pd films based on AAOs were found to have a quick and reversible response due to their enhanced absorption and disorption of hydrogen. Using thinner nanoporous films, concentrations of hydrogen as low as 250 ppm can be detected and a much higher sensitivity, up to 12% resistance variation, was obtained. Two competing hydrogen-sensing processes, the phase-induced increase of film resistance and the break-junction-induced decrease of film resistance, were found in the nanoporous Pd films upon absorption of hydrogen.

AB - Nanoporous Pd films supported by porous anodic aluminum oxides (AAOs) were investigated regarding their performance in detecting hydrogen gas with concentrations up to 1% in nitrogen at room temperature. Compared with dense Pd films that usually have very slow responses, nanoporous Pd films based on AAOs were found to have a quick and reversible response due to their enhanced absorption and disorption of hydrogen. Using thinner nanoporous films, concentrations of hydrogen as low as 250 ppm can be detected and a much higher sensitivity, up to 12% resistance variation, was obtained. Two competing hydrogen-sensing processes, the phase-induced increase of film resistance and the break-junction-induced decrease of film resistance, were found in the nanoporous Pd films upon absorption of hydrogen.

KW - Hydrogen sensor

KW - Palladium

KW - Porous nanofilm

KW - Resistance

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Hydrogen sensing of nanoporous palladium films supported by anodic aluminum oxides

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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