Facet-Control versus Co-Catalyst-Control in Photocatalytic H₂ Evolution from Anatase TiO₂ Nanocrystals.

ABSTRACT: Titanium dioxide (TiO₂ ) and, in particular, its anatase polymorph, is widely studied for photocatalytic H₂ production. In the present work, we examine the importance of reactive facets of anatase crystallites on the photocatalytic H₂ evolution from aqueous methanol solutions. For this, we synthesized anatase TiO₂ nanocrystals with a large amount of either {001} facets, that is, nanosheets, or {101} facets, that is, octahedral nanocubes, and examined their photocatalytic H₂ evolution and then repeated this procedure with samples where Pt co-catalyst is present on all facets. Octahedral nanocubes with abundant {101} facets produce >4 times more H₂ than nanosheets enriched in {001} facets if the reaction is carried out under c

SUBMITTER: Qin S 

PROVIDER: S-EPMC8889503 | biostudies-literature | 2022 Mar

REPOSITORIES: biostudies-literature