Ultra-sensitive hydrogen gas sensors based on Pd-decorated tin dioxide nanostructures

Room temperature operating sensors

Jun Min Lee, Ji Eun Park, Seri Kim, Sol Kim, Eunyoung Lee, Sung Jin Kim, Wooyoung Lee

Research output: Contribution to journalArticle

70 Citations (Scopus)

Abstract

We have investigated the fabrication of hydrogen gas sensors based on networks of Pd nanoparticles (NPs) deposited tin dioxide nanowires (NWs). SnO2 NWs with tin NPs attached on the surface were obtained by a simple thermal evaporation of SnO crystalline powders. The tin dioxide NWs were decorated with Pd NPs by the reduction process in Pd ion solution. The sensors showed ultra-high sensitivity (∼1.2 × 105%) and fast response time (∼2 s) upon exposure to 10,000 ppm H2 at room temperature. These sensors were also found to enable a significant electrical conductance modulation upon exposure to extremely low concentrations (40 ppm) of H2 in the air. Our fabrication method of sensors combining with Pd NPs, Sn NPs and n-type semiconducting SnO2 NWs allows optimized catalytic and depletion effect and results the production of highly-sensitive H2 sensors that exhibit a broad dynamic detection range, fast response times, and an ultra-low detection limit.

Original languageEnglish
Pages (from-to)12568-12573
Number of pages6
JournalInternational Journal of Hydrogen Energy
Volume35
Issue number22
DOIs
Publication statusPublished - 2010 Nov 1

Fingerprint

Tin dioxide
Chemical sensors
dioxides
Nanostructures
tin
Nanowires
Nanoparticles
nanowires
nanoparticles
Hydrogen
sensors
Sensors
room temperature
hydrogen
gases
Temperature
Fabrication
fabrication
Thermal evaporation
Tin

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

Cite this

Lee, Jun Min ; Park, Ji Eun ; Kim, Seri ; Kim, Sol ; Lee, Eunyoung ; Kim, Sung Jin ; Lee, Wooyoung. / Ultra-sensitive hydrogen gas sensors based on Pd-decorated tin dioxide nanostructures : Room temperature operating sensors. In: International Journal of Hydrogen Energy. 2010 ; Vol. 35, No. 22. pp. 12568-12573.
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abstract = "We have investigated the fabrication of hydrogen gas sensors based on networks of Pd nanoparticles (NPs) deposited tin dioxide nanowires (NWs). SnO2 NWs with tin NPs attached on the surface were obtained by a simple thermal evaporation of SnO crystalline powders. The tin dioxide NWs were decorated with Pd NPs by the reduction process in Pd ion solution. The sensors showed ultra-high sensitivity (∼1.2 × 105{\%}) and fast response time (∼2 s) upon exposure to 10,000 ppm H2 at room temperature. These sensors were also found to enable a significant electrical conductance modulation upon exposure to extremely low concentrations (40 ppm) of H2 in the air. Our fabrication method of sensors combining with Pd NPs, Sn NPs and n-type semiconducting SnO2 NWs allows optimized catalytic and depletion effect and results the production of highly-sensitive H2 sensors that exhibit a broad dynamic detection range, fast response times, and an ultra-low detection limit.",
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Ultra-sensitive hydrogen gas sensors based on Pd-decorated tin dioxide nanostructures : Room temperature operating sensors. / Lee, Jun Min; Park, Ji Eun; Kim, Seri; Kim, Sol; Lee, Eunyoung; Kim, Sung Jin; Lee, Wooyoung.

In: International Journal of Hydrogen Energy, Vol. 35, No. 22, 01.11.2010, p. 12568-12573.

Research output: Contribution to journalArticle

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