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Pd/ZnO nanorods based sensor for highly selective detection of extremely low concentration hydrogen
We report highly hydrogen selective Pd contacted ZnO nanorods based sensor detecting low concentration even at low operating temperature of 50 °C. The sensor performance was investigated for various gases such as H(2), CH(4), H(2)S and CO(2) at different operating temperatures from 50 °C to 175 °C f...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5428294/ https://www.ncbi.nlm.nih.gov/pubmed/28331192 http://dx.doi.org/10.1038/s41598-017-00362-x |
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author | Kumar, Mohit Singh Bhati, Vijendra Ranwa, Sapana Singh, Jitendra kumar, Mahesh |
author_facet | Kumar, Mohit Singh Bhati, Vijendra Ranwa, Sapana Singh, Jitendra kumar, Mahesh |
author_sort | Kumar, Mohit |
collection | PubMed |
description | We report highly hydrogen selective Pd contacted ZnO nanorods based sensor detecting low concentration even at low operating temperature of 50 °C. The sensor performance was investigated for various gases such as H(2), CH(4), H(2)S and CO(2) at different operating temperatures from 50 °C to 175 °C for various gas concentrations ranging from 7 ppm to 10,000 ppm (1%). The sensor is highly efficient as it detects hydrogen even at low concentration of ~7 ppm and at operating temperature of 50 °C. The sensor’s minimum limit of detection and relative response at 175 °C were found 7 ppm with ~38.7% for H(2), 110 ppm with ~6.08% for CH(4), 500 ppm with ~10.06% for H(2)S and 1% with ~11.87% for CO(2). Here, Pd exhibits dual characteristics as metal contact and excellent catalyst to hydrogen molecules. The activation energy was calculated for all the gases and found lowest ~3.658 kJ/mol for H(2). Low activation energy accelerates desorption reactions and enhances the sensor’s performance. |
format | Online Article Text |
id | pubmed-5428294 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-54282942017-05-15 Pd/ZnO nanorods based sensor for highly selective detection of extremely low concentration hydrogen Kumar, Mohit Singh Bhati, Vijendra Ranwa, Sapana Singh, Jitendra kumar, Mahesh Sci Rep Article We report highly hydrogen selective Pd contacted ZnO nanorods based sensor detecting low concentration even at low operating temperature of 50 °C. The sensor performance was investigated for various gases such as H(2), CH(4), H(2)S and CO(2) at different operating temperatures from 50 °C to 175 °C for various gas concentrations ranging from 7 ppm to 10,000 ppm (1%). The sensor is highly efficient as it detects hydrogen even at low concentration of ~7 ppm and at operating temperature of 50 °C. The sensor’s minimum limit of detection and relative response at 175 °C were found 7 ppm with ~38.7% for H(2), 110 ppm with ~6.08% for CH(4), 500 ppm with ~10.06% for H(2)S and 1% with ~11.87% for CO(2). Here, Pd exhibits dual characteristics as metal contact and excellent catalyst to hydrogen molecules. The activation energy was calculated for all the gases and found lowest ~3.658 kJ/mol for H(2). Low activation energy accelerates desorption reactions and enhances the sensor’s performance. Nature Publishing Group UK 2017-03-22 /pmc/articles/PMC5428294/ /pubmed/28331192 http://dx.doi.org/10.1038/s41598-017-00362-x Text en © The Author(s) 2017 This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
spellingShingle | Article Kumar, Mohit Singh Bhati, Vijendra Ranwa, Sapana Singh, Jitendra kumar, Mahesh Pd/ZnO nanorods based sensor for highly selective detection of extremely low concentration hydrogen |
title | Pd/ZnO nanorods based sensor for highly selective detection of extremely low concentration hydrogen |
title_full | Pd/ZnO nanorods based sensor for highly selective detection of extremely low concentration hydrogen |
title_fullStr | Pd/ZnO nanorods based sensor for highly selective detection of extremely low concentration hydrogen |
title_full_unstemmed | Pd/ZnO nanorods based sensor for highly selective detection of extremely low concentration hydrogen |
title_short | Pd/ZnO nanorods based sensor for highly selective detection of extremely low concentration hydrogen |
title_sort | pd/zno nanorods based sensor for highly selective detection of extremely low concentration hydrogen |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5428294/ https://www.ncbi.nlm.nih.gov/pubmed/28331192 http://dx.doi.org/10.1038/s41598-017-00362-x |
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