Amorphous Pd-assisted H 2 detection of ZnO nanorod gas sensor with enhanced sensitivity and stability

Handle URI:
http://hdl.handle.net/10754/627047
Title:
Amorphous Pd-assisted H 2 detection of ZnO nanorod gas sensor with enhanced sensitivity and stability
Authors:
Kim, Hyeonghun; Pak, Yusin; Jeong, Yeonggyo; Kim, Woochul; Kim, Jeongnam; Jung, Gun Young
Abstract:
For monitoring H2 concentrations in air, diverse resistive gas sensors have been demonstrated. In particular, Pd-decorated metal oxides have shown remarkable selectivity and sensing response for H2 detection. In this work, H2 sensing behavior of amorphous Pd layer covering ZnO nanorods (am-Pd/ZnO NRs) is investigated. This is the first report on the enhanced gas sensing performance attained by using an amorphous metal layer. The amorphous Pd layer is generated by reduction reaction with a strong reducing agent (NaBH4), and it covers the ZnO nanorods completely with a thickness of 2 ∼ 5 nm. For comparison, crystalline Pd nanoparticles-decorated ZnO nanorods (c-Pd/ZnO NRs) are produced using a milder reducing agent like hydrazine. Comparing the c-Pd/ZnO NRs sensor and other previously reported hydrogen sensors based on the crystalline Pd and metal oxides, the am-Pd/ZnO NRs sensor exhibits a remarkable sensing response (12,400% at 2% H2). The enhancement is attributed to complete cover of the amorphous Pd layer on the ZnO NRs, inducing larger interfaces between the Pd and ZnO. In addition, the amorphous Pd layer prevents surface contamination of the ZnO NRs. Therefore, the am-Pd/ZnO NRs sensor maintains initial sensing performance even after 5 months.
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Citation:
Kim H, Pak Y, Jeong Y, Kim W, Kim J, et al. (2018) Amorphous Pd-assisted H 2 detection of ZnO nanorod gas sensor with enhanced sensitivity and stability. Sensors and Actuators B: Chemical. Available: http://dx.doi.org/10.1016/j.snb.2018.02.025.
Publisher:
Elsevier BV
Journal:
Sensors and Actuators B: Chemical
Issue Date:
5-Feb-2018
DOI:
10.1016/j.snb.2018.02.025
Type:
Article
ISSN:
0925-4005
Sponsors:
This work was supported by the by the Small and Medium Business Administration’s 2016 start-up growth technology development project, (No. S2425024) and by the Basic Science Research Program (NRF-2016R1A2B4006395) through the National Research Foundation of Korea (NRF) funded by the Ministry of Education. The research was partially supported by the GIST Research Institute (GRI) project through a grant provided by GIST in 2017. H. Kim is supported by the NRF Grant funded by the Korean Government (NRF-2015-Fostering Core Leaders of the Future Basic Science Program/Global Ph. D. Fellowship Program).
Additional Links:
http://www.sciencedirect.com/science/article/pii/S0925400518302958
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorKim, Hyeonghunen
dc.contributor.authorPak, Yusinen
dc.contributor.authorJeong, Yeonggyoen
dc.contributor.authorKim, Woochulen
dc.contributor.authorKim, Jeongnamen
dc.contributor.authorJung, Gun Youngen
dc.date.accessioned2018-02-07T07:02:24Z-
dc.date.available2018-02-07T07:02:24Z-
dc.date.issued2018-02-05en
dc.identifier.citationKim H, Pak Y, Jeong Y, Kim W, Kim J, et al. (2018) Amorphous Pd-assisted H 2 detection of ZnO nanorod gas sensor with enhanced sensitivity and stability. Sensors and Actuators B: Chemical. Available: http://dx.doi.org/10.1016/j.snb.2018.02.025.en
dc.identifier.issn0925-4005en
dc.identifier.doi10.1016/j.snb.2018.02.025en
dc.identifier.urihttp://hdl.handle.net/10754/627047-
dc.description.abstractFor monitoring H2 concentrations in air, diverse resistive gas sensors have been demonstrated. In particular, Pd-decorated metal oxides have shown remarkable selectivity and sensing response for H2 detection. In this work, H2 sensing behavior of amorphous Pd layer covering ZnO nanorods (am-Pd/ZnO NRs) is investigated. This is the first report on the enhanced gas sensing performance attained by using an amorphous metal layer. The amorphous Pd layer is generated by reduction reaction with a strong reducing agent (NaBH4), and it covers the ZnO nanorods completely with a thickness of 2 ∼ 5 nm. For comparison, crystalline Pd nanoparticles-decorated ZnO nanorods (c-Pd/ZnO NRs) are produced using a milder reducing agent like hydrazine. Comparing the c-Pd/ZnO NRs sensor and other previously reported hydrogen sensors based on the crystalline Pd and metal oxides, the am-Pd/ZnO NRs sensor exhibits a remarkable sensing response (12,400% at 2% H2). The enhancement is attributed to complete cover of the amorphous Pd layer on the ZnO NRs, inducing larger interfaces between the Pd and ZnO. In addition, the amorphous Pd layer prevents surface contamination of the ZnO NRs. Therefore, the am-Pd/ZnO NRs sensor maintains initial sensing performance even after 5 months.en
dc.description.sponsorshipThis work was supported by the by the Small and Medium Business Administration’s 2016 start-up growth technology development project, (No. S2425024) and by the Basic Science Research Program (NRF-2016R1A2B4006395) through the National Research Foundation of Korea (NRF) funded by the Ministry of Education. The research was partially supported by the GIST Research Institute (GRI) project through a grant provided by GIST in 2017. H. Kim is supported by the NRF Grant funded by the Korean Government (NRF-2015-Fostering Core Leaders of the Future Basic Science Program/Global Ph. D. Fellowship Program).en
dc.publisherElsevier BVen
dc.relation.urlhttp://www.sciencedirect.com/science/article/pii/S0925400518302958en
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Sensors and Actuators B: Chemical. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Sensors and Actuators B: Chemical, 5 February 2018. DOI: 10.1016/j.snb.2018.02.025. © 2018. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.subjectAmorphous palladiumen
dc.subjectZnO nanoroden
dc.subjectHydrogenen
dc.subjectGas sensoren
dc.titleAmorphous Pd-assisted H 2 detection of ZnO nanorod gas sensor with enhanced sensitivity and stabilityen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalSensors and Actuators B: Chemicalen
dc.eprint.versionPost-printen
dc.contributor.institutionSchool of Materials Science and Engineerging, Gwangju Institute of Science and Technology (GIST), 123 Cheomdangwagi-ro, Buk-gu, Gwangju 61005, Republic of Koreaen
dc.contributor.institutionSsollock Co. Ltd., 333 Cheomdangwagi-ro Buk-gu, Gwangju 61008, Republic of Koreaen
kaust.authorPak, Yusinen
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