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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...

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Autores principales: Kumar, Mohit, Singh Bhati, Vijendra, Ranwa, Sapana, Singh, Jitendra, kumar, Mahesh
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2017
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.
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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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