Hydrogen sensing under ambient conditions using SnO2 nanowires: Synergetic effect of Pd/Sn codeposition

Seung Ho Jeong; Sol Kim; Junho Cha; Min Soo Son; Sang Han Park; Ha Yeong Kim; Man Ho Cho; Myung Hwan Whangbo; Kyung Hwa Yoo; Sung Jin Kim

doi:10.1021/nl402998g

Hydrogen sensing under ambient conditions using SnO₂ nanowires: Synergetic effect of Pd/Sn codeposition

Seung Ho Jeong, Sol Kim, Junho Cha, Min Soo Son, Sang Han Park, Ha Yeong Kim, Man Ho Cho, Myung Hwan Whangbo, Kyung Hwa Yoo, Sung Jin Kim

Department of Chemistry & Nanoscience

Research output: Contribution to journal › Article › peer-review

46 Scopus citations

Abstract

Semiconducting SnO₂ nanowires deposited with Pd and Sn nanoparticles on their surface are shown to be a highly sensitive hydrogen sensor with fast response time at room temperature. Compared with the SnO ₂ nanowire deposited with Pd or Sn nanoparticles alone, the Pd/Sn-deposited SnO₂ nanowire exhibits a significant improvement in the sensitivity and reversibility of sensing hydrogen gas in the air at room temperature. Our investigation indicates that two factors are responsible for the synergistic effect of Pd/Sn codeposition on SnO₂ nanowires. One is that in the presence of Pd the oxidation of Sn nanoparticles on the surface of the SnO₂ nanowire is incomplete leading only to suboxides SnO _x (1 ≤ x < 2), and the other is that the surface of the Pd/Sn-deposited SnO₂ nanowire is almost perfectly hydrophobic.

Original language	English
Pages (from-to)	5938-5943
Number of pages	6
Journal	Nano Letters
Volume	13
Issue number	12
DOIs	https://doi.org/10.1021/nl402998g
State	Published - 11 Dec 2013

Keywords

Room-temperature hydrogen sensor
SnO nanowire
synergetic effect of Pd/Sn codeposition

Access to Document

10.1021/nl402998g

Cite this

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title = "Hydrogen sensing under ambient conditions using SnO2 nanowires: Synergetic effect of Pd/Sn codeposition",

abstract = "Semiconducting SnO2 nanowires deposited with Pd and Sn nanoparticles on their surface are shown to be a highly sensitive hydrogen sensor with fast response time at room temperature. Compared with the SnO 2 nanowire deposited with Pd or Sn nanoparticles alone, the Pd/Sn-deposited SnO2 nanowire exhibits a significant improvement in the sensitivity and reversibility of sensing hydrogen gas in the air at room temperature. Our investigation indicates that two factors are responsible for the synergistic effect of Pd/Sn codeposition on SnO2 nanowires. One is that in the presence of Pd the oxidation of Sn nanoparticles on the surface of the SnO2 nanowire is incomplete leading only to suboxides SnO x (1 ≤ x < 2), and the other is that the surface of the Pd/Sn-deposited SnO2 nanowire is almost perfectly hydrophobic.",

keywords = "Room-temperature hydrogen sensor, SnO nanowire, synergetic effect of Pd/Sn codeposition",

author = "Jeong, {Seung Ho} and Sol Kim and Junho Cha and Son, {Min Soo} and Park, {Sang Han} and Kim, {Ha Yeong} and Cho, {Man Ho} and Whangbo, {Myung Hwan} and Yoo, {Kyung Hwa} and Kim, {Sung Jin}",

year = "2013",

month = dec,

day = "11",

doi = "10.1021/nl402998g",

language = "English",

volume = "13",

pages = "5938--5943",

journal = "Nano Letters",

issn = "1530-6984",

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T1 - Hydrogen sensing under ambient conditions using SnO2 nanowires

T2 - Synergetic effect of Pd/Sn codeposition

AU - Jeong, Seung Ho

AU - Kim, Sol

AU - Cha, Junho

AU - Son, Min Soo

AU - Park, Sang Han

AU - Kim, Ha Yeong

AU - Cho, Man Ho

AU - Whangbo, Myung Hwan

AU - Yoo, Kyung Hwa

AU - Kim, Sung Jin

PY - 2013/12/11

Y1 - 2013/12/11

N2 - Semiconducting SnO2 nanowires deposited with Pd and Sn nanoparticles on their surface are shown to be a highly sensitive hydrogen sensor with fast response time at room temperature. Compared with the SnO 2 nanowire deposited with Pd or Sn nanoparticles alone, the Pd/Sn-deposited SnO2 nanowire exhibits a significant improvement in the sensitivity and reversibility of sensing hydrogen gas in the air at room temperature. Our investigation indicates that two factors are responsible for the synergistic effect of Pd/Sn codeposition on SnO2 nanowires. One is that in the presence of Pd the oxidation of Sn nanoparticles on the surface of the SnO2 nanowire is incomplete leading only to suboxides SnO x (1 ≤ x < 2), and the other is that the surface of the Pd/Sn-deposited SnO2 nanowire is almost perfectly hydrophobic.

AB - Semiconducting SnO2 nanowires deposited with Pd and Sn nanoparticles on their surface are shown to be a highly sensitive hydrogen sensor with fast response time at room temperature. Compared with the SnO 2 nanowire deposited with Pd or Sn nanoparticles alone, the Pd/Sn-deposited SnO2 nanowire exhibits a significant improvement in the sensitivity and reversibility of sensing hydrogen gas in the air at room temperature. Our investigation indicates that two factors are responsible for the synergistic effect of Pd/Sn codeposition on SnO2 nanowires. One is that in the presence of Pd the oxidation of Sn nanoparticles on the surface of the SnO2 nanowire is incomplete leading only to suboxides SnO x (1 ≤ x < 2), and the other is that the surface of the Pd/Sn-deposited SnO2 nanowire is almost perfectly hydrophobic.

KW - Room-temperature hydrogen sensor

KW - SnO nanowire

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