Pd/ZnO nanorods based sensor for highly selective detection of extremely low concentration hydrogen

Abstract 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 H2, CH4, H2S and CO2 at different operating temperatures from 50 °C to 175 °C...

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Main Authors:	Mohit Kumar, Vijendra Singh Bhati, Sapana Ranwa, Jitendra Singh, Mahesh kumar
Format:	article
Language:	EN
Published:	Nature Portfolio 2017
Subjects:	Medicine R Science Q
Online Access:	https://doaj.org/article/b4c47eac25f847c49aab2f14088798c8
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spelling	oai:doaj.org-article:b4c47eac25f847c49aab2f14088798c82021-12-02T11:52:30ZPd/ZnO nanorods based sensor for highly selective detection of extremely low concentration hydrogen10.1038/s41598-017-00362-x2045-2322https://doaj.org/article/b4c47eac25f847c49aab2f14088798c82017-03-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-00362-xhttps://doaj.org/toc/2045-2322Abstract 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 H2, CH4, H2S and CO2 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 H2, 110 ppm with ~6.08% for CH4, 500 ppm with ~10.06% for H2S and 1% with ~11.87% for CO2. 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 H2. Low activation energy accelerates desorption reactions and enhances the sensor’s performance.Mohit KumarVijendra Singh BhatiSapana RanwaJitendra SinghMahesh kumarNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Mohit Kumar Vijendra Singh Bhati Sapana Ranwa Jitendra Singh Mahesh kumar Pd/ZnO nanorods based sensor for highly selective detection of extremely low concentration hydrogen
description	Abstract 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 H2, CH4, H2S and CO2 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 H2, 110 ppm with ~6.08% for CH4, 500 ppm with ~10.06% for H2S and 1% with ~11.87% for CO2. 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 H2. Low activation energy accelerates desorption reactions and enhances the sensor’s performance.
format	article
author	Mohit Kumar Vijendra Singh Bhati Sapana Ranwa Jitendra Singh Mahesh kumar
author_facet	Mohit Kumar Vijendra Singh Bhati Sapana Ranwa Jitendra Singh Mahesh kumar
author_sort	Mohit Kumar
title	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_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_sort	pd/zno nanorods based sensor for highly selective detection of extremely low concentration hydrogen
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/b4c47eac25f847c49aab2f14088798c8
work_keys_str_mv	AT mohitkumar pdznonanorodsbasedsensorforhighlyselectivedetectionofextremelylowconcentrationhydrogen AT vijendrasinghbhati pdznonanorodsbasedsensorforhighlyselectivedetectionofextremelylowconcentrationhydrogen AT sapanaranwa pdznonanorodsbasedsensorforhighlyselectivedetectionofextremelylowconcentrationhydrogen AT jitendrasingh pdznonanorodsbasedsensorforhighlyselectivedetectionofextremelylowconcentrationhydrogen AT maheshkumar pdznonanorodsbasedsensorforhighlyselectivedetectionofextremelylowconcentrationhydrogen
_version_	1718395063867801600

Pd/ZnO nanorods based sensor for highly selective detection of extremely low concentration hydrogen

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