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Ustarroz J, Geboes B, Vanrompay H, et al. Electrodeposition of Highly Porous Pt Nanoparticles Studied by Quantitative 3D Electron Tomography: Influence of Growth Mechanisms and Potential Cycling on the Active Surface Area. ACS Appl Mater Interfaces. 2017;9(19):16168-16177doi: 10.1021/acsami.7b01619.
Ustarroz, J., Geboes, B., Vanrompay, H., Sentosun, K., Bals, S., Breugelmans, T., & Hubin, A. (2017). Electrodeposition of Highly Porous Pt Nanoparticles Studied by Quantitative 3D Electron Tomography: Influence of Growth Mechanisms and Potential Cycling on the Active Surface Area. ACS applied materials & interfaces, 9(19), 16168-16177. https://doi.org/10.1021/acsami.7b01619
Ustarroz, Jon, et al. "Electrodeposition of Highly Porous Pt Nanoparticles Studied by Quantitative 3D Electron Tomography: Influence of Growth Mechanisms and Potential Cycling on the Active Surface Area." ACS applied materials & interfaces vol. 9,19 (2017): 16168-16177. doi: https://doi.org/10.1021/acsami.7b01619
Ustarroz J, Geboes B, Vanrompay H, Sentosun K, Bals S, Breugelmans T, Hubin A. Electrodeposition of Highly Porous Pt Nanoparticles Studied by Quantitative 3D Electron Tomography: Influence of Growth Mechanisms and Potential Cycling on the Active Surface Area. ACS Appl Mater Interfaces. 2017 May 17;9(19):16168-16177. doi: 10.1021/acsami.7b01619. Epub 2017 May 03. PMID: 28418651.
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ACS Appl Mater Interfaces. 2017 May 17;9(19):16168-16177. doi: 10.1021/acsami.7b01619. Epub 2017 May 03.

Electrodeposition of Highly Porous Pt Nanoparticles Studied by Quantitative 3D Electron Tomography: Influence of Growth Mechanisms and Potential Cycling on the Active Surface Area.

ACS applied materials & interfaces

Jon Ustarroz, Bart Geboes, Hans Vanrompay, Kadir Sentosun, Sara Bals, Tom Breugelmans, Annick Hubin

Affiliations

  1. Vrije Universiteit Brussel (VUB) , Research Group Electrochemical and Surface Engineering (SURF), Pleinlaan 2, 1050 Brussels, Belgium.
  2. Research Group Advanced Reactor Technology (ART), University of Antwerp , Universiteitsplein 1, 2610 Wilrijk, Belgium.
  3. Electron Microscopy for Materials Research (EMAT), University of Antwerp , Groenenborgerlaan 171, B-2020 Antwerp, Belgium.

PMID: 28418651 DOI: 10.1021/acsami.7b01619

Abstract

Nanoporous Pt nanoparticles (NPs) are promising fuel cell catalysts due to their large surface area and increased electrocatalytic activity toward the oxygen reduction reaction (ORR). Herein, we report on the influence of the growth mechanisms on the surface properties of electrodeposited Pt dendritic NPs with large surface areas. The electrochemically active surface was studied by hydrogen underpotential deposition (H UPD) and compared for the first time to high-angle annular dark field scanning transmission electron microscopy (HAADF-STEM) quantitative 3D electron tomography of individual nanoparticles. Large nucleation overpotential leads to a large surface coverage of roughened spheroids, which provide a large roughness factor (R

Keywords: catalyst stability; electrodeposition; electron tomography; hydrogen UPD; nanoparticle; nanoporous; platinum

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