Optimized loading of Pt single atoms from platinic acid solution and the sweet spot for activity
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15640%2F25%3A73632987" target="_blank" >RIV/61989592:15640/25:73632987 - isvavai.cz</a>
Result on the web
<a href="https://pubs.rsc.org/en/content/articlelanding/2025/nr/d5nr03976b" target="_blank" >https://pubs.rsc.org/en/content/articlelanding/2025/nr/d5nr03976b</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1039/d5nr03976b" target="_blank" >10.1039/d5nr03976b</a>
Alternative languages
Result language
angličtina
Original language name
Optimized loading of Pt single atoms from platinic acid solution and the sweet spot for activity
Original language description
In recent years, platinum single atoms (SAs) have emerged as exceptionally efficient co-catalysts for photocatalytic hydrogen (H2) evolution. In the present work, we systematically investigate the solution parameters that govern the deposition of Pt SAs from dilute H2PtCl6 precursors onto well-defined sputtered anatase TiO2 thin films and evaluate the effect on photocatalytic H2 evolution. We show that both precursor concentration and solution composition critically determine the oxidation state, dispersion, and reactivity of surface-bound Pt species. Ultra-dilute, additive-free solutions (0.001-0.005 mM) enable strong electrostatic adsorption (SEA) and aquation-assisted anchoring of isolated Pt2+ atoms, leading to atomically dispersed Pt-O-Ti surface motifs with maximal H2 evolution per Pt. In contrast, increased ionic strength or unfavorable speciation caused by higher concentration or pH adjustment induces non-selective uptake, formation of Pt(iv)-rich 2D rafts, and diminished catalytic performance. Overall, we show that the placement and photocatalytic activity of Pt SAs are dictated by the pre-reaction deposition chemistry. From a practical view, this study defines a narrow yet actionable parameter window for scalable, efficient SA co-catalyst decoration and establishes the mechanistic basis for performance optimization via precursor-chemistry design.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10403 - Physical chemistry
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Nanoscale
ISSN
2040-3364
e-ISSN
2040-3372
Volume of the periodical
17
Issue of the periodical within the volume
48
Country of publishing house
GB - UNITED KINGDOM
Number of pages
8
Pages from-to
28104-28111
UT code for WoS article
001623302400001
EID of the result in the Scopus database
2-s2.0-105022873412