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Cited by 319

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On the Controlled Loading of Single Platinum Atoms as a Co‐Catalyst on TiO2 Anatase for Optimized Photocatalytic H2 Generation

Open access
Hejazi, Seyedsina, Mohajernia, Shiva, Osuagwu, Benedict, Zoppellaro, Giorgio, Andryskova, Pavlina, Tomanec, Ondrej, Kment, Stepan, Zbořil, Radek, Schmuki, Patrik·2020·Advanced Materials

Abstract

Single‐atom (SA) catalysis is a novel frontline in the catalysis field due to the often drastically enhanced specific activity and selectivity of many catalytic reactions. Here, an atomic‐scale defect engineering approach to form and control traps for platinum SA sites as co‐catalyst for photocatalytic H 2 generation is described. Thin sputtered TiO 2 layers are used as a model photocatalyst, and compared to the more frequently used (001) anatase sheets. To form stable SA platinum, the TiO 2 layers are reduced in Ar/H 2 under different conditions (leading to different but defined Ti 3+‐O v surface defects), followed by immersion in a dilute hexachloroplatinic acid solution. HAADF‐STEM results show that only on the thin‐film substrate can the density of SA sites be successfully controlled by the degree of reduction by annealing. An optimized SA‐Pt decoration can enhance the normalized photocatalytic activity of a TiO 2 sputtered sample by 150 times in comparison to a conventional platinum‐nanoparticle‐decorated TiO 2 surface. HAADF‐STEM, XPS, and EPR investigation jointly confirm the atomic nature of the decorated Pt on TiO 2. Importantly, the density of the relevant surface exposed defect centers—thus the density of Pt‐SA sites, which play the key role in photocatalytic activity—can be precisely optimized.

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Metadata

Authors
Hejazi, S., Mohajernia, S., Osuagwu, B., Zoppellaro, G., Andryskova, P., Tomanec, O., Kment, S., Zbořil, R., & Schmuki, P.
Venue
Advanced Materials
Publisher
Wiley
Published
2020-03-03
Volume
32
Issue
16
Pages
e1908505-e1908505
ISSN
  • 0935-9648 (ISSN-L)
  • 1521-4095
OpenAlex
W3009511332
Cited by
319
References
51
FWCI
8.48
Type
journal article
Language
en
Open access
hybrid

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CoChat. (2026). Citation check: On the Controlled Loading of Single Platinum Atoms as a Co‐Catalyst on TiO2 Anatase for Optimized Photocatalytic H2 Generation. https://app.cochat.ai/papers/10.1002/adma.201908505
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Hejazi, S., Mohajernia, S., Osuagwu, B., Zoppellaro, G., Andryskova, P., Tomanec, O., Kment, S., Zbořil, R., & Schmuki, P. (2020). On the Controlled Loading of Single Platinum Atoms as a Co‐Catalyst on TiO2 Anatase for Optimized Photocatalytic H2 Generation. Advanced Materials. https://doi.org/10.1002/adma.201908505

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