Efficient hydrogen production by selective alcohol photoreforming on plasmonic photocatalyst comprising sandwiched Au nanodisks and TiO2

[Display omitted] •A nanocomposite of Au/TiO2 sandwiched between zeolite nanosheets is fabricated.•The intersheet space allows confined growth of edge-attached Au nanodisks and TiO2.•The plasmonic composite is highly active for H2 production by methanol reforming.•Zeolite nanosheets allow only metha...

Full description

Saved in:
Bibliographic Details
Published in:Applied catalysis. B, Environmental Environmental, 2019-10, Vol.255, p.117773, Article 117773
Main Authors: Chang, Albert, Peng, Wei-Shun, Tsai, I-Tai, Chiang, Li-Fen, Yang, Chia-Min
Format: Article
Language:English
Subjects:
Alcohol photoreforming
Alcohols
Deactivation
Domains
Gold
Hydrogen
Hydrogen production
Methanol
Nanocomposites
Nanostructure
Organic chemistry
Photocatalysis
Photocatalysts
Plasmonic photocatalyst
Reforming
Titanium dioxide
Zeolite nanosheets
Zeolites
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:[Display omitted] •A nanocomposite of Au/TiO2 sandwiched between zeolite nanosheets is fabricated.•The intersheet space allows confined growth of edge-attached Au nanodisks and TiO2.•The plasmonic composite is highly active for H2 production by methanol reforming.•Zeolite nanosheets allow only methanol but not higher alcohols to react at Au surface.•The chemisorbed CO results in gradual deactivation of the plasmonic photocatalyst. A nanocomposite comprising gold nanodisks (Au NDs) and titanium dioxide (TiO2) nanophases sandwiched between zeolite nanosheets was fabricated for hydrogen production by plasmonic photocatalytic reforming of methanol. The inter-sheet space between zeolite nanosheets served as nanoconfinement for forming the edge-attached domains of Au NDs/TiO2. Benefiting from the anisotropic shape of Au NDs and their edge attachment with TiO2, the nanocomposite exhibited superior photoactivity for visible light (>400 nm)-driven photoreforming of methanol and the hydrogen production rate was ˜ 24 times higher than that of the benchmark Au@P25 photocatalyst. Moreover, experimental results suggest that zeolite nanosheets effectively gated the access to the surface of Au NDs and allowed only methanol but not higher alcohols to react to produce hydrogen. Gradual deactivation was observed during methanol photoreforming, a phenomenon shown to be attributed to the chemisorbed CO accumulated on Au in the absence of oxygen.
ISSN:0926-3373
1873-3883
DOI:10.1016/j.apcatb.2019.117773