The Chemical Deposition Method for the Decoration of Palladium Particles on Carbon Nanofibers with Rapid Conductivity Changes.
Palladium (Pd) metal is well-known for hydrogen sensing material due to its high sensitivity and selectivity toward hydrogen, and is able to detect hydrogen at near room temperature. In this work, palladium-doped carbon nanofibers (Pd/CNFs) were successfully produced in a facile manner via electrospinning. Well-organized and uniformly distributed Pd was observed in microscopic images of the resultant nanofibers. Hydrogen causes an increment in the volume of Pd due to the ability of hydrogen atoms to occupy the octahedral interstitial positions within its face centered cubic lattice structure, resulting in the resistance transition of Pd/CNFs. The resistance variation was around 400%, and it responded rapidly within 1 min, even in 5% hydrogen atmosphere conditions at room temperature. This fibrous hybrid material platform will open a new and practical route and stimulate further researches on the development of hydrogen sensing materials with rapid response, even to low concentrations of hydrogen in an atmosphere.
Nano Fusion Technology Research Group, Division of Frontier Fibers, Institute for Fiber Engineering (IFES), Interdisciplinary Cluster for Cutting Edge Research (ICCER), Shinshu University, Tokida 3-15-1, Ueda, Nagano 386-8567, Japan. hoik0822@gmail.com.
Hoik
H
Lee
Nano Fusion Technology Research Group, Division of Frontier Fibers, Institute for Fiber Engineering (IFES), Interdisciplinary Cluster for Cutting Edge Research (ICCER), Shinshu University, Tokida 3-15-1, Ueda, Nagano 386-8567, Japan. duynamphan@gmail.com.
Duy-Nam
DN
Phan
Department of Chemistry, Inha University, Incheon 22212, Korea. mkim233@inha.ac.kr.
Myungwoong
M
Kim
Department of Chemistry and Research Institute for Natural Sciences, Hanyang University, Seoul 04763, Korea. dsohn@hanyang.ac.kr.
Daewon
D
Sohn
Department of Chemical Engineering, Hanyang University, Seoul 04763, Korea. seongoh@hanyang.ac.kr.
Seong-Geun
SG
Oh
Department of Organic and Nano Engineering, Hanyang University, Seoul 04763, Korea. kimsh@hanyang.ac.kr.
Seong Hun
SH
Kim
Nano Fusion Technology Research Group, Division of Frontier Fibers, Institute for Fiber Engineering (IFES), Interdisciplinary Cluster for Cutting Edge Research (ICCER), Shinshu University, Tokida 3-15-1, Ueda, Nagano 386-8567, Japan. kim@shinshu-u.ac.jp.
Ick Soo
IS
Kim
carbon nanofiber; chemical deposition; conductivity change; hydrogen sensor; palladium-doped carbon nanofibers; volume change