Hydrogen sensors based on Pt-loaded WO3 sensing layers

被引：28

作者：

Bose, R. Jolly ^{[1
,2
]}

Illyaskutty, Navas ^{[3
]}

Tan, K. S. ^{[4
]}

Rawat, R. S. ^{[4
]}

Matham, Murukeshan Vadakke ^{[5
]}

Kohler, Heinz ^{[3
]}

Pillai, V. P. Mahadevan ^{[1
]}

机构：

[1] Univ Kerala Kariavattom, Dept Optoelect, Thiruvananthapuram 695581, Kerala, India

[2] Govt Coll Kariavattom, Dept Phys, Thiruvananthapuram 695581, Kerala, India

[3] Karlsruhe Univ Appl Sci, Inst Sensor & Informat Syst, Moltkestr 30, D-76133 Karlsruhe, Germany

[4] Nanyang Technol Univ, Natl Inst Educ, Nat Sci & Sci Educ, Singapore 637616, Singapore

[5] Nanyang Technol Univ, Sch Mech & Aerosp Engn, Div Mfg Engn, Singapore 637616, Singapore

来源：

EPL | 2016年 / 114卷 / 06期

关键词：

THIN-FILMS; GAS SENSORS; DEPOSITION; MECHANISM; CATALYSTS; PD;

D O I：

10.1209/0295-5075/114/66002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In this letter we report the enhanced sensing of platinum (Pt)-loaded tungsten oxide (WO3) sensor compared to pure WO3 sensor towards hydrogen (H-2) gas at low operating temperature of 200 degrees C. The hydrogen sensing of pure and Pt-loaded WO3 sensors is reported at operating temperatures 200, 300 and 400 degrees C. The presence of Pt promotes the spillover mechanism and the dissociated H-2 atoms can react with adsorbed/lattice oxygen atoms to release electrons which in turn increases the conductivity of the WO3 film. The H-2 sensing mechanism of Pt-loaded WO3 sensor is investigated using micro-Raman spectroscopy. The Raman spectrum of Pt-loaded sensing layer shows a shift of symmetric stretching band from 796 to 804 cm(-1) with the introduction of H-2 gas. Copyright (C) EPLA, 2016

引用

页数：6

共 50 条

[21] Hydrogen sensing characteristics of WO3 thin film conductometric sensors activated by Pt and Au catalysts
Ippolito, SJ
Kandasamy, S
Kalantar-zadeh, K
Wlodarski, W
SENSORS AND ACTUATORS B-CHEMICAL, 2005, 108 (1-2) : 154 - 158
[22] Hydrogen sensing mechanism of Ru-loaded WO3 nanosheets
Huang, Dan
Yuan, Wenjing
Fan, Shurui
Tian, Chen
Hua, Zhongqiu
Tian, Xuemin
Wu, Yi
Li, Er-ping
SENSORS AND ACTUATORS B-CHEMICAL, 2020, 304
[23] Polymer-Filled In-Fiber Mach-Zehnder Interferometer with Pt-loaded WO3 Coating for Trace Hydrogen Detection
Du, Bin
He, Jun
Guo, Kuikui
Xu, Xizhen
Wang, Ying
Wang, Yiping
2020 ASIA COMMUNICATIONS AND PHOTONICS CONFERENCE (ACP) AND INTERNATIONAL CONFERENCE ON INFORMATION PHOTONICS AND OPTICAL COMMUNICATIONS (IPOC), 2020,
[24] CO sensing mechanism with WO3 based gas sensors
Huebner, M.
Simion, C. E.
Haensch, A.
Barsan, N.
Weimar, U.
SENSORS AND ACTUATORS B-CHEMICAL, 2010, 151 (01) : 103 - 106
[25] UNDERSTANDING THE SENSING MECHANISM OF WO3 BASED GAS SENSORS
Staerz, Anna
Russ, Tamara
Weimar, Udo
Barsan, Nicolae
2019 IEEE INTERNATIONAL SYMPOSIUM ON OLFACTION AND ELECTRONIC NOSE (ISOEN 2019), 2019, : 256 - 258
[26] Optical hydrogen sensor based on PDMS-formed double-C type cavities with embedded Pt-loaded WO3/SiO2
Li, Yina
Shen, Weimin
Zhao, Chunliu
Xu, Ben
Wang, Dongning
Yang, Minghong
SENSORS AND ACTUATORS B-CHEMICAL, 2018, 276 : 23 - 30
[27] Investigation of Pt and Pd Modified WO3 and ZnO Based Thin Film Sensors for Ethanol Sensing
Roy, Subhashis
Dey, Anup
Biswas, Bikram
Sarkar, Subir Kumar
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE, 2018, 27 (06) : 2635 - 2642
[28] Investigation of Pt and Pd Modified WO3 and ZnO Based Thin Film Sensors for Ethanol Sensing
Subhashis Roy
Anup Dey
Bikram Biswas
Subir Kumar Sarkar
Journal of Materials Engineering and Performance, 2018, 27 : 2635 - 2642
[29] Fabrication of Pt/WO3 Films for Visible Hydrogen Sensing at Room Temperature
Miyazaki, Hidetoshi
Shiota, Miyuki
CHEMISTRY LETTERS, 2020, 49 (10) : 1147 - 1149
[30] Preparation and characterization of Pt loaded WO3 films suitable for gas sensing applications
Bose, R. Jolly
Illyasukutty, Navas
Tan, K. S.
Rawat, R. S.
Matham, Murukesan Vadakke
Kohler, Heinz
Pillai, V. P. Mahadevan
APPLIED SURFACE SCIENCE, 2018, 440 : 320 - 330

← 1 2 3 4 5 →