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

作者：Lee Jun Min; Park Ji eun; Kim Seri; Kim Sol; Lee Eunyoung; Kim Sung Jin; Lee Wooyoung^*

来源：International Journal of Hydrogen Energy, 2010, 35(22): 12568-12573.

DOI：10.1016/j.ijhydene.2010.08.026

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

We have investigated the fabrication of hydrogen gas sensors based on networks of Pd nanoparticles (NPs) deposited tin dioxide nanowires (NWs) SnO(2) 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 (similar to 1 2 x 10(5)%) and fast response time (similar to 2 s) upon exposure to 10 000 ppm H(2) at room temperature These sensors were also found to enable a significant electrical conductance modulation upon exposure to extremely low concentrations (40 ppm) of H(2) in the air Our fabrication method of sensors combining with Pd NPs Sn NPs and n type semiconducting SnO(2) NWs allows optimized catalytic and depletion effect and results the production of highly sens

• 出版日期2010-11