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

doi:10.1016/j.ijhydene.2010.08.026

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

Department of Chemistry & Nanoscience

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

109 Scopus citations

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 language	English
Pages (from-to)	12568-12573
Number of pages	6
Journal	International Journal of Hydrogen Energy
Volume	35
Issue number	22
DOIs	https://doi.org/10.1016/j.ijhydene.2010.08.026
State	Published - Nov 2010

Bibliographical note

Funding Information:
This work was supported by Priority Research Centers Program ( 2010-0028296 ) through the National Research Foundation of Korea (NRF), the Basic Research Program grant ( 2010-0027687 ) and Seoul Research and Business Development Program ( 10816 ) S Kim is grateful for the financial support of a grant from the National Research Foundation of Korea Grant funded by the Korean Government ( 2010-0001484 ).

Keywords

Depleted region
Hydrogen gas
Pd nanoparticles
Spill-over
Tin dioxide
Tin nanoparticles

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10.1016/j.ijhydene.2010.08.026

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title = "Ultra-sensitive hydrogen gas sensors based on Pd-decorated tin dioxide nanostructures: Room temperature operating sensors",

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.",

keywords = "Depleted region, Hydrogen gas, Pd nanoparticles, Spill-over, Tin dioxide, Tin nanoparticles",

author = "Lee, {Jun Min} and Park, {Ji Eun} and Seri Kim and Sol Kim and Eunyoung Lee and Kim, {Sung Jin} and Wooyoung Lee",

note = "Funding Information: This work was supported by Priority Research Centers Program ( 2010-0028296 ) through the National Research Foundation of Korea (NRF), the Basic Research Program grant ( 2010-0027687 ) and Seoul Research and Business Development Program ( 10816 ) S Kim is grateful for the financial support of a grant from the National Research Foundation of Korea Grant funded by the Korean Government ( 2010-0001484 ). ",

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AU - Lee, Eunyoung

AU - Kim, Sung Jin

AU - Lee, Wooyoung

N1 - Funding Information: This work was supported by Priority Research Centers Program ( 2010-0028296 ) through the National Research Foundation of Korea (NRF), the Basic Research Program grant ( 2010-0027687 ) and Seoul Research and Business Development Program ( 10816 ) S Kim is grateful for the financial support of a grant from the National Research Foundation of Korea Grant funded by the Korean Government ( 2010-0001484 ).

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N2 - 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.

AB - 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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KW - Hydrogen gas

KW - Pd nanoparticles

KW - Spill-over

KW - Tin dioxide

KW - Tin nanoparticles

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Ultra-sensitive hydrogen gas sensors based on Pd-decorated tin dioxide nanostructures: Room temperature operating sensors

Abstract

Bibliographical note

Keywords

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