by Shanshan Qin, Lancang Shui, Benedict Osuagwu, Nikita Denisov, Alexander B. Tesler, Patrik Schmuki
Abstract:
Abstract Titanium dioxide (TiO 2 ) and, in particular, its anatase polymorph, is widely studied for photocatalytic H 2 production. In the present work, we examine the importance of reactive facets of anatase crystallites on the photocatalytic H 2 evolution from aqueous methanol solutions. For this, we synthesized anatase TiO 2 nanocrystals with a large amount of either 01 facets, that is, nanosheets, or 101 facets, that is, octahedral nanocubes, and examined their photocatalytic H 2 evolution and then repeated this procedure with samples where Pt co‐catalyst is present on all facets. Octahedral nanocubes with abundant 101 facets produce textgreater4 times more H 2 than nanosheets enriched in 01 facets if the reaction is carried out under co‐catalyst‐free conditions. For samples that carry Pt co‐catalyst on both 01 and 101 facets, faceting loses entirely its significance. This demonstrates that the beneficial role of faceting, namely the introduction of 101 facets that act as electron transfer mediator is relevant only for co‐catalyst‐free TiO 2 surfaces.
Reference:
Shanshan Qin, Lancang Shui, Benedict Osuagwu, Nikita Denisov, Alexander B. Tesler, Patrik SchmukiFacet‐Control versus Co‐Catalyst‐Control in Photocatalytic H $_{textrm{2}}$ Evolution from Anatase TiO $_{textrm{2}}$ NanocrystalsIn ChemistryOpen, volume 11, 2022.
Bibtex Entry:
@article{qin_facetcontrol_2022,
title = {Facet‐{Control} versus {Co}‐{Catalyst}‐{Control} in {Photocatalytic} {H} $_{textrm{2}}$ {Evolution} from {Anatase} {TiO} $_{textrm{2}}$ {Nanocrystals}},
volume = {11},
issn = {2191-1363, 2191-1363},
url = {https://chemistry-europe.onlinelibrary.wiley.com/doi/10.1002/open.202200010},
doi = {10.1002/open.202200010},
abstract = {Abstract
Titanium dioxide (TiO
2
) and, in particular, its anatase polymorph, is widely studied for photocatalytic H
2
production. In the present work, we examine the importance of reactive facets of anatase crystallites on the photocatalytic H
2
evolution from aqueous methanol solutions. For this, we synthesized anatase TiO
2
nanocrystals with a large amount of either {001} facets, that is, nanosheets, or {101} facets, that is, octahedral nanocubes, and examined their photocatalytic H
2
evolution and then repeated this procedure with samples where Pt co‐catalyst is present on all facets. Octahedral nanocubes with abundant {101} facets produce {textgreater}4 times more H
2
than nanosheets enriched in {001} facets if the reaction is carried out under co‐catalyst‐free conditions. For samples that carry Pt co‐catalyst on both {001} and {101} facets, faceting loses entirely its significance. This demonstrates that the beneficial role of faceting, namely the introduction of {101} facets that act as electron transfer mediator is relevant only for co‐catalyst‐free TiO
2
surfaces.},
language = {en},
number = {3},
urldate = {2024-05-21},
journal = {ChemistryOpen},
author = {Qin, Shanshan and Shui, Lancang and Osuagwu, Benedict and Denisov, Nikita and Tesler, Alexander B. and Schmuki, Patrik},
month = mar,
year = {2022},
pages = {e202200010},
file = {Volltext:C:\Users\lovis\Zotero\storage\T6UIA7K9\Qin et al. - 2022 - Facet‐Control versus Co‐Catalyst‐Control in Photoc.pdf:application/pdf},
}