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Applied Science and Convergence Technology 2023; 32(4): 100-103
Published online July 30, 2023
https://doi.org/10.5757/ASCT.2023.32.4.100
Copyright © The Korean Vacuum Society.
In-situ Synthesis of Pd/WO3 Nanocomposites for Low-Temperature Hydrogen Gas Sensing
Mohammad Jamir Ahemada , Seok-Ki Hyunga , Hee Yun Yanga , b , Minji Ima , Eunyoung Leea , Ji Hee Choia , Tae-Wook Kimb , c , Seoung-Ki Leed 
, Byung Joon Moona , c , and Sukang Baea , c , ∗
aInstitute of Advanced Composite Materials, Korea Institute of Science and Technology, Wanju 55324, Republic of Korea
bDepartment of Flexible and Printable Electronics, LANL‐JBNU Engineering Institute, Jeonbuk National University, Jeonju 54896, Republic of Korea
cDepartment of JBNU-KIST Industry-Academia Convergence Research, Jeonbuk National University, Jeonju 54896, Republic of Korea
dSchool of Materials Science and Engineering, Pusan National University, Busan 46241, Republic of Korea
Correspondence to:sbae@kist.re.kr
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (https://creativecommons.org/licenses/by-nc-nd/4.0/) which permits non-commercial use, distribution and reproduction in any medium without alteration, provided that the original work is properly cited.
In this study, H2 sensors were developed with Pd-doped porous WO3 (Pd/WO3) as the sensing material using different amounts (wt%) of Pd. Pd/WO3 was synthesized using an in-situ high-temperature solvothermal method. The surface morphology and nanostructure of Pd/WO3 were characterized through X-ray diffraction and high-resolution transmission electron microscopy. 1.0 wt% Pd/WO3 exhibited the highest hydrogen-sensing ability compared to pure WO3 and 0.5 wt% and 1.5 wt% Pd/WO3 at 100 °C. The Pd/WO3-based gas sensor demonstrated promising H2-sensing characteristics, such as high selectivity and good repeatability. Therefore, this sensor is an excellent candidate for use in applications that require high-performance low-temperature H2 sensing.
Keywords: Pd, WO3, In-situ synthesis, Low operating temperature, Hydrogen gas sensor
