The Library
Pd-doped reduced graphene oxide sensing films for H2 detection
Tools
Tools
Tools
Pandey, Priyanka A., Wilson, Neil R. and Covington, James A. (2013) Pd-doped reduced graphene oxide sensing films for H2 detection. Sensors and Actuators B: Chemical, Volume 183 . pp. 478-487. doi:10.1016/j.snb.2013.03.089 ISSN 0925-4005.
Research output not available from this repository.
Request-a-Copy directly from author or use local Library Get it For Me service.
Official URL: http://dx.doi.org/10.1016/j.snb.2013.03.089
Abstract
The detection of low levels of hydrogen is becoming of ever-greater importance due to its potential use as a green energy. Current methods of hydrogen detection are predominantly based around three core technologies, semi-conductive chemiresistive metal oxides, electrochemical and chemical field-effect transistors. Of these techniques, metal-oxide and electrochemical sensors suffer from cross-sensitivity to a range of interferrent gases, CO being the most critical. Field-effect techniques are far more selective, but have a high cost of manufacture due to their complex construct, thus there is a need for a low-cost and selective sensing technology that could be applied to mass production. Here, we report on the fabrication, electrical and chemical characterisation of a Pd-doped reduced graphene oxide chemiresistors. Sensors were produced by the spin coating of graphene oxide onto a silicon based gold electrode structure, the graphene oxide was reduced and then Pd sputter coated. Initial investigation showed that the sensors have a clear response to hydrogen with sensitivity down to 50 parts per million level. Cross-sensitivity tests indicated that these sensors did not respond to CO, ethanol and toluene. Thermal characterisation showed that an increase in temperature improves sensor response by a factor of three between 30 °C and 75 °C. The effect of humidity was also explored; here an increase in sensor response was achieved at higher humidity concentrations, with sensor operation up to 75 °C. In addition, the effect of Pd and reduced graphene oxide layers was investigated to evaluate its significance as a function of sensor response. Here a thickness of 3 nm of Pd and 2 nm of reduced graphene oxide were shown to offer the highest sensitivity. Finally, Pd doped graphene sensors were tested for comparison purposes. Here the sensor response of these sensors was found to be higher, though the manufacture process is far more complex. Doped reduced graphene oxide chemisresistors offer considerable promise as a mass produced gas sensor due to its ease of manufacture, good chemical performance and low cross-sensitivity. This may make such sensors ideal for future hydrogen detection applications.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering Faculty of Science, Engineering and Medicine > Science > Physics |
||||
| Journal or Publication Title: | Sensors and Actuators B: Chemical | ||||
| Publisher: | Elsevier Science SA | ||||
| ISSN: | 0925-4005 | ||||
| Official Date: | 2013 | ||||
| Dates: |
|
||||
| Volume: | Volume 183 | ||||
| Page Range: | pp. 478-487 | ||||
| DOI: | 10.1016/j.snb.2013.03.089 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access |
Request changes or add full text files to a record
Repository staff actions (login required)
 |
View Item |
