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Your search keyword '"Cheong, Soshan"' showing total 14 results
Start Over Author "Cheong, Soshan" Journal journal of the american chemical society
14 results on '"Cheong, Soshan"'

1. Introducing Stacking Faults into Three-Dimensional Branched Nickel Nanoparticles for Improved Catalytic Activity

Author

Ramadhan, Zeno R., primary, Poerwoprajitno, Agus R., additional, Cheong, Soshan, additional, Webster, Richard F., additional, Kumar, Priyank V., additional, Cychy, Steffen, additional, Gloag, Lucy, additional, Benedetti, Tania M., additional, Marjo, Christopher E., additional, Muhler, Martin, additional, Wang, Da-Wei, additional, Gooding, J. Justin, additional, Schuhmann, Wolfgang, additional, and Tilley, Richard D., additional

Published
2022
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2. Preserving the Exposed Facets of Pt3Sn Intermetallic Nanocubes During an Order to Disorder Transition Allows the Elucidation of the Effect of the Degree of Alloy Ordering on Electrocatalysis

Author

Chen, Hsiang-Sheng, primary, Benedetti, Tania M., additional, Gonçales, Vinicius R., additional, Bedford, Nicholas M., additional, Scott, Robert W. J., additional, Webster, Richard F., additional, Cheong, Soshan, additional, Gooding, J. Justin, additional, and Tilley, Richard D., additional

Published
2020
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7. In situ and ex situ studies of platinum nanocrystals: growth and evolution in solution

Author

Cheong, Soshan, Watt, John, Ingham, Bridget, Toney, Michael F., and Tilley, Richard D.

Subjects
Platinum -- Chemical properties, Transmission electron microscopes -- Usage, X-rays -- Diffraction, X-rays -- Usage, Chemistry
Abstract

Synchrotron-based X-ray diffraction (XRD) techniques were employed to carry out in situ studies on the growth and evolution of platinum nanocrystals in solution. The platinum nanocrystals in the high-concentration reaction were observed to form branched structures and grow at much greater rates under a kinetically controlled regime.

Published
2009

14. Preserving the Exposed Facets of Pt 3 Sn Intermetallic Nanocubes During an Order to Disorder Transition Allows the Elucidation of the Effect of the Degree of Alloy Ordering on Electrocatalysis.

Author

Chen HS, Benedetti TM, Gonçales VR, Bedford NM, Scott RWJ, Webster RF, Cheong S, Gooding JJ, and Tilley RD

Abstract

Controlling which facets are exposed in nanocrystals is crucial to understanding different activity between ordered and disordered alloy electrocatalysts. We modify the degree of ordering of Pt 3 Sn nanocubes, while maintaining the shape and size, to enable a direct evaluation of the effect of the order on ORR catalytic activity. We demonstrate a 2.3-fold enhancement in specific activity by 60- and 30%-ordered Pt 3 Sn nanocubes compared to 95%-ordered. This was shown to be likely due to surface vacancies in the less-ordered particles. The greater order, however, results in higher stability of the electrocatalyst, with the more disordered nanoparticles showing the dissolution of tin and platinum species during electrocatalysis.

Published
2020
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