Pt/TiO2 granular photocatalysts for hydrogen production from aqueous glycerol solution: Durability against seawater constituents and dissolved oxygen

We examined the impact of seawater constituents and dissolved oxygen (DO) on granular Pt/TiO2 photocatalytic reactions producing hydrogen from water with glycerol as a sacrificial agent. Hydrogen production halved in seawater compared to pure water, mainly due to flocculation of the granules, and ac...

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Bibliographic Details
Published inCatalysis communications Vol. 114; pp. 124 - 128
Main Authors Sakurai, Hiroaki, Kiuchi, Masato, Jin, Tetsuro
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.08.2018
Subjects
Dissolved oxygen
Hydrogen production
Photocatalyst
Pt/TiO2
Seawater
Pt/TiO2
Dissolved oxygen
Photocatalyst
Hydrogen production
Seawater
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Summary:We examined the impact of seawater constituents and dissolved oxygen (DO) on granular Pt/TiO2 photocatalytic reactions producing hydrogen from water with glycerol as a sacrificial agent. Hydrogen production halved in seawater compared to pure water, mainly due to flocculation of the granules, and activity recovered by deflocculation and/or lowering the Na+ concentrations. The activity of the settled granular photocatalyst was higher than that of the suspended powder photocatalyst under anoxic conditions. The decrease in activity was small up to the DO value of pure oxygen bubbling, which shows the effective inhibition of oxygen reduction and thermal hydrogen oxidation. •Easy handling of granular photocatalyst for repeated reactions was illustrated.•Deflocculation of granules improved hydrogen evolution activity in seawater.•Oxygen reduction and thermal reaction were suppressed in oxygen bubbling conditions. [Display omitted]
ISSN:1566-7367
1873-3905
DOI:10.1016/j.catcom.2018.06.013