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장지욱

Jang, Ji-Wook
JW Energy Lab.
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Enhanced Photocatalytic Hydrogen Production from Water-Methanol Solution by Nickel Intercalated into Titanate Nanotube

Alternative Title
Enhanced Photocatalytic Hydrogen Production from Water-Methanol Solution by Nickel Intercalated into Titanate Nanotube
Author(s)
Jang, Jum SukChoi, Sun HeeKim, Dong HyunJang, Ji-WookLee, Kyung SubLee, Jae Sung
Issued Date
2009-05
DOI
10.1021/jp900653r
URI
https://scholarworks.unist.ac.kr/handle/201301/12325
Fulltext
http://pubs.acs.org/doi/abs/10.1021/jp900653r
Citation
JOURNAL OF PHYSICAL CHEMISTRY C, v.113, no.20, pp.8990 - 8996
Abstract
Nickel-intercalated titanate nanotube was hydrothermally synthesized and evaluated for photocatalytic hydrogen production from methanol-water solution under UV light irradiation. The nickel intercalated into the nanotube was present as a hydrated Ni complex of [Ni-x(II)(OH)(2x-1)(OH2)](+) and was responsible for a dramatic enhancement of hydrogen evolution rate relative to that of titanate nanotube itself. The nickel species in the interlayer provided active sites for proton reduction and caused fast diffusion of photoelectrons generated from titanate layers toward the nickel sites, leading to a high photocatalytic activity. Upon annealing at 400 degrees C, the hydrated nickel complex was partly converted to NiO and the hydrogen evolution rate was reduced, indicating that the nickel hydroxide was a more efficient cocatalyst for titanate nanotube. A high and stable photocurrent generation was also observed from a film made of the nickel-intercalated titanate nanotube immersed in a NaOH solution
Publisher
AMER CHEMICAL SOC
ISSN
1932-7447

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