Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/14389
Title: Feasibility of H2 sensors composed of tungsten oxide nanocluster films
Authors: Zhao, M
Huang, J
Ong, CW 
Issue Date: 2013
Source: International journal of hydrogen energy, 2013, v. 38, no. 35, p. 15559-15566
Abstract: The hydrogen (H2) sensing properties, including the sensor response, response time and recovery time, of different sensor architectures based on tungsten oxide (WO3) were investigated to assess the feasibility of using WO3 in producing practical H2 sensors. Each of the different sensor architectures consists of 3 layers. The first layer is a 2.5-nm palladium (Pd) layer, which is always deposited onto a highly porous WO3 nanocluster layer. The third layer is an Au/Ti electrode layer, which may be constructed in the form of interdigitated electrodes or 5 × 5 mm2 pad electrodes, which is located either on the top surface of the Pd layer or at the bottom of the WO3 film. Furthermore, the WO3 layer was also constructed to be either 11.2 nm or 153 nm thick. The sensor design consisting of a 2.5-nm Pd layer on an 11.2-nm WO3 layer with interdigitated electrodes at the bottom of the layer was found to exhibit the best overall H2 sensing properties, with excellent cyclic stability over 600 cycles of operation.
Keywords: Feasibility
Hydrogen sensor
Stability
Tungsten oxide nanocluster film
Publisher: Pergamon Press
Journal: International journal of hydrogen energy 
ISSN: 0360-3199
EISSN: 1879-3487
DOI: 10.1016/j.ijhydene.2013.09.069
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