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Titanium dioxide induced immobilization of small platinum nanoparticles on carbon spherogels: a strategy towards stable and efficient electrocatalysts for the hydrogen evolution reaction
Citation Link: https://doi.org/10.15480/882.16929
Publikationstyp
Journal Article
Date Issued
2026
Sprache
English
Author(s)
Almohammad, Aseel
Kirstein, Mathis
TORE-DOI
Journal
Article Number
e12049
Citation
Small: e12049 (2026)
Publisher DOI
Publisher
Wiley
Peer Reviewed
true
This study introduces a new strategy to electrocatalyst synthesis by immobilizing platinum nanoparticles (Pt-NPs) on carbon spherogels—nanoporous, monodisperse carbon hollow spheres with diameters of 170–240 nm and surface areas of up to 800 m2 g−1 with or without incorporated titanium-dioxide (TiO2) sublayers, using supercritical deposition. The resulting materials feature precisely tunable Pt-loadings (2–11 wt%), narrow Pt-NP size distributions, low interparticle distances (4.4–8.2 nm), and high Pt-NP dispersion (Pt-NP mean diameter 2.2–3.5 nm). The presence of TiO2 sublayers enhances both catalytic activity and durability in the hydrogen evolution reaction compared to a commercial Pt/C benchmark with similar Pt content. TiO2 containing electrocatalysts exhibit Pt-NPs in the inner part of spheres and outstanding stability, demonstrated by (a) minimal potential shifts (1–4 mV) after accelerated stability tests, (b) suppression of Pt-NP growth and detachment, and (c) structural integrity retention after 70 h under harsh conditions. These findings highlight the potential of spherogels as advanced catalyst supports and offer a scalable synthesis route without requirement for hazardous templating agents. Thanks to the tunable support morphology, precise Pt-NP deposition, and remarkable long-term performance, this approach emerges as a strong candidate for designing next generation electrocatalysts.
Subjects
Electrocatalysts
Hydrogen Evolution Reaction
Carbon Spherogels
DDC Class
620.5: Nanotechnology
530: Physics
Publication version
publishedVersion
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Name
Small - 2026 - Pein - Titanium Dioxide Induced Immobilization of Small Platinum Nanoparticles on Carbon Spherogels A.pdf
Type
Main Article
Size
2.73 MB
Format
Adobe PDF