화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.95, 325-332, March, 2021
DOI10.1016/j.jiec.2021.01.005  Export Citation
Core and dopant effects toward hydrogen gas sensing activity using Pd@N-CeO2 core.shell nanoflatforms
Dung Van Dao1, 2, Thuy T.D. Nguyen3, Dong-Seog Kim3, Ji-Wook Yoon3, Yeon-Tae Yu3, †, and In-Hwan Lee2, †
  • 1Institute of Research and Development, Duy Tan University, Da Nang 550000, Viet Nam, Vietnam
  • 2Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea
  • 3Division of Advanced Materials Engineering, Research Center of Advanced Materials Development, Jeonbuk National University, Jeonju 54896, Republic of Korea
E-mail:,
Developing efficient and stable hydrogen gas sensors may be of urgent demand for its safety uses. Herein, Pd@N-CeO2 core.shell nanoflatforms (CSNFs) are fabricated and utilized for this purpose. The resulting Pd@N-CeO2 CSNFs offer small particle sizes with high Brunauer-Emmett-Teller (BET) surface area and porous nanostructures. The core.shell sensors establish high hydrogen sensing response and fast response and recovery times at a lower optimal working temperature compared to undoped and doped CeO2 ones. In addition, it further demonstrates high selectivity and stability toward hydrogen gas among interfering different target gases. The hydrogen gas sensing betterment is synergistically assigned to Pd core, N dopant, and high BET surface area effects, which decidedly modulate the electrical resistance of core.shell sensors to improve overall gas sensing performance accordingly. Our finding provides an efficient way to design and fabricate versatile hydrogen gas sensors based on metal@nitrogen dopedsemiconductor oxide core.shell nanostructures.
Keywords:Palladium;Ceria;Nitrogen dopant;Hydrogen sensor;Core-shell
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