Volume 54, Issue 8 pp. 2340-2344

Communication

Chemical-Reaction-Induced Hot Electron Flows on Platinum Colloid Nanoparticles under Hydrogen Oxidation: Impact of Nanoparticle Size^†

Hyosun Lee,

Hyosun Lee

Center for Nanomaterials and Chemical Reactions, Institute for Basic Science, Daejeon 305-701 (Korea)

Graduate School of EEWS, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 305-701 (Korea)

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Ievgen I. Nedrygailov,

Ievgen I. Nedrygailov

Center for Nanomaterials and Chemical Reactions, Institute for Basic Science, Daejeon 305-701 (Korea)

Graduate School of EEWS, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 305-701 (Korea)

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Changhwan Lee,

Changhwan Lee

Center for Nanomaterials and Chemical Reactions, Institute for Basic Science, Daejeon 305-701 (Korea)

Graduate School of EEWS, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 305-701 (Korea)

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Prof. Gabor A. Somorjai,

Corresponding Author

Prof. Gabor A. Somorjai

[email protected]

Department of Chemistry, University of California, Berkeley, CA 94720 (USA)

Gabor A. Somorjai, Department of Chemistry, University of California, Berkeley, CA 94720 (USA)

Jeong Young Park, Center for Nanomaterials and Chemical Reactions, Institute for Basic Science, Daejeon 305-701 (Korea)

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Prof. Jeong Young Park,

Corresponding Author

Prof. Jeong Young Park

[email protected]

Center for Nanomaterials and Chemical Reactions, Institute for Basic Science, Daejeon 305-701 (Korea)

Graduate School of EEWS, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 305-701 (Korea)

Gabor A. Somorjai, Department of Chemistry, University of California, Berkeley, CA 94720 (USA)

Jeong Young Park, Center for Nanomaterials and Chemical Reactions, Institute for Basic Science, Daejeon 305-701 (Korea)

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Hyosun Lee,

Hyosun Lee

Center for Nanomaterials and Chemical Reactions, Institute for Basic Science, Daejeon 305-701 (Korea)

Graduate School of EEWS, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 305-701 (Korea)

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Ievgen I. Nedrygailov,

Ievgen I. Nedrygailov

Center for Nanomaterials and Chemical Reactions, Institute for Basic Science, Daejeon 305-701 (Korea)

Graduate School of EEWS, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 305-701 (Korea)

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Changhwan Lee,

Changhwan Lee

Center for Nanomaterials and Chemical Reactions, Institute for Basic Science, Daejeon 305-701 (Korea)

Graduate School of EEWS, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 305-701 (Korea)

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Prof. Gabor A. Somorjai,

Corresponding Author

Prof. Gabor A. Somorjai

[email protected]

Department of Chemistry, University of California, Berkeley, CA 94720 (USA)

Gabor A. Somorjai, Department of Chemistry, University of California, Berkeley, CA 94720 (USA)

Jeong Young Park, Center for Nanomaterials and Chemical Reactions, Institute for Basic Science, Daejeon 305-701 (Korea)

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Prof. Jeong Young Park,

Corresponding Author

Prof. Jeong Young Park

[email protected]

Center for Nanomaterials and Chemical Reactions, Institute for Basic Science, Daejeon 305-701 (Korea)

Graduate School of EEWS, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 305-701 (Korea)

Gabor A. Somorjai, Department of Chemistry, University of California, Berkeley, CA 94720 (USA)

Jeong Young Park, Center for Nanomaterials and Chemical Reactions, Institute for Basic Science, Daejeon 305-701 (Korea)

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First published: 03 February 2015

https://doi.org/10.1002/anie.201410951

Citations: 59

^†

The work was supported by IBS-R004-G4, Republic of Korea, and by the Director, Office of Science, Office of Basic Energy Sciences, Division of Chemical Science, Geological and Biosciences of the US Department of Energy under contract DE-AC02-05CH11231.

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Graphical Abstract

Catalytic nanodiodes: Chemically induced hot electron flows on Pt nanoparticles were measured using Au/TiO₂ nanodiodes (see picture) and showed the correlation of chemicurrent with catalytic activity. The catalytic nanodiodes with smaller Pt nanoparticles lead to higher chemicurrent, and the temperature dependence is similar to that of the turnover frequency.

Abstract

Generation of hot electron flows and the catalytic activity of Pt nanoparticles (NPs) with different sizes were investigated using catalytic nanodiodes. We show that smaller Pt NPs lead to higher chemicurrent yield, which is associated with the shorter travel length for the hot electrons, compared with their inelastic mean free path. We also show the impact of capping on charge carrier transfer between Pt NPs and their support.

Supporting Information

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Volume54, Issue8

February 16, 2015

Pages 2340-2344

Chemical-Reaction-Induced Hot Electron Flows on Platinum Colloid Nanoparticles under Hydrogen Oxidation: Impact of Nanoparticle Size^†

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Chemical-Reaction-Induced Hot Electron Flows on Platinum Colloid Nanoparticles under Hydrogen Oxidation: Impact of Nanoparticle Size†

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Chemical-Reaction-Induced Hot Electron Flows on Platinum Colloid Nanoparticles under Hydrogen Oxidation: Impact of Nanoparticle Size^†