Photochemical hydrogen evolution using Pt/titania nanosheet catalysts prepared by chemical-reduction and photo-deposition methods

Takimoto, Hosei; Hirade, Yugo; Shimada, Takahiro; Ishida, Tamao; Takagi, Shinsuke

doi:10.1016/j.rechem.2021.100271

Cited by 2 publications

(2 citation statements)

References 43 publications

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“…Similarly, Pt produced using photo deposition on TiO 2 nanosheets demonstrated performance three times superior to chemical reduction. Given STEM images, it was confirmed the strategic placement of Pt NPs on the TiO 2 nanosheets is responsible for the enhanced performance [48] . However, TEM/STEM provides just a local information.…”

Section: Introductionmentioning

confidence: 88%

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Atomic‐level investigation on significance of photoreduced Pt nanoparticles over g‐C₃N₄/bimetallic oxide composites

et al. 2023

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Designing an effective photocatalyst for solar‐to‐chemical fuel conversion presents significant challenges. Herein, g‐C3N4 nanotubes/CuCo2O4 (CN‐NT‐CCO) composites decorated with platinum nanoparticles (Pt NPs) were successfully synthesized by chemical and photochemical reductions. The size distribution and location of Pt NPs on the surface of CN‐NT‐CCO composites were directly observed by TEM. Extended X‐ray absorption fine structure (EXAFS) spectra of Pt L3‐edge for the above composite confirmed establishment of Pt−N bonds at an atomic distance of 2.09 Å in the photoreduced Pt‐bearing composite, which was shorter than in chemically reduced Pt‐bearing composites. This proved the stronger interaction of photoreduced Pt NPs with the CN‐NT‐CCO composite than chemical reduced one. The H2 evolution performance of the photoreduced (PR) Pt@CN‐NT‐CCO (2079 μmol h−1 g−1) was greater than that of the chemically reduced (CR) Pt@CN‐NT‐CCO composite (1481 μmol h−1 g−1). The abundance of catalytically active sites and transfer of electrons from CN‐NT to the Pt NPs to participate in the hydrogen evolution are the primary reasons for the improved performance. Furthermore, electrochemical investigations and band edge locations validated the presence of a Z‐scheme heterojunction at the Pt@CN‐NT‐CCO interface. This work offers unique perspectives on the structure and interface design at the atomic level to fabricate high‐performance heterojunction photocatalysts.

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Section: Introductionmentioning

confidence: 88%

“…Given STEM images, it was confirmed the strategic placement of Pt NPs on the TiO 2 nanosheets is responsible for the enhanced performance. [48] However, TEM/STEM provides just a local information. Besides the dimension of Pt NPs, the photocatalytic activity is dictated mostly by their electronic and atomic structure.…”

Section: Introductionmentioning

confidence: 99%

Atomic‐level investigation on significance of photoreduced Pt nanoparticles over g‐C₃N₄/bimetallic oxide composites

et al. 2023

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Insight into the LED-induced deposition of Pt nanoparticles on a graphite matrix: Unravelling the photodeposition processes on materials different than semiconductors

Kubiak

Rozmanowski

Gabała

et al. 2023

Journal of Photochemistry and Photobiology A: Chemistry

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Photochemical hydrogen evolution using Pt/titania nanosheet catalysts prepared by chemical-reduction and photo-deposition methods

Cited by 2 publications

References 43 publications

Atomic‐level investigation on significance of photoreduced Pt nanoparticles over g‐C₃N₄/bimetallic oxide composites

Atomic‐level investigation on significance of photoreduced Pt nanoparticles over g‐C₃N₄/bimetallic oxide composites

Insight into the LED-induced deposition of Pt nanoparticles on a graphite matrix: Unravelling the photodeposition processes on materials different than semiconductors

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Photochemical hydrogen evolution using Pt/titania nanosheet catalysts prepared by chemical-reduction and photo-deposition methods

Cited by 2 publications

References 43 publications

Atomic‐level investigation on significance of photoreduced Pt nanoparticles over g‐C3N4/bimetallic oxide composites

Atomic‐level investigation on significance of photoreduced Pt nanoparticles over g‐C3N4/bimetallic oxide composites

Insight into the LED-induced deposition of Pt nanoparticles on a graphite matrix: Unravelling the photodeposition processes on materials different than semiconductors

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Product

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Atomic‐level investigation on significance of photoreduced Pt nanoparticles over g‐C₃N₄/bimetallic oxide composites

Atomic‐level investigation on significance of photoreduced Pt nanoparticles over g‐C₃N₄/bimetallic oxide composites