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Shape-controlled electrodeposition of single Pt nanocrystals onto carbon nanoelectrodes

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Abstract

In this paper, we report the electrosynthesis and characterization of individual, shape-controlled Pt nanocrystals (NCs) electrodeposited on carbon nanoelectrodes (CNEs). Single Pt NCs were deposited onto the CNEs using an empirically developed square-wave potential program. Characterization by scanning electron microscopy indicates that the sizes of Pt NCs are remarkably reproducible (relative standard deviation = 6%). Electrochemically active surface areas, determined by Cu underpotential deposition and H adsorption/desorption analyses, are also reproducible. Selected area electron diffraction indicates that each Pt NC is comprised of just one single crystal (no grain boundaries). Although different square-wave potential programs lead to different types of crystals, the Pt NCs discussed here have a concave hexoctahedral geometry bound primarily by {13 6 2} surface facets. The results in this report represent a first step toward our ultimate goal of studying electrocatalysis at individual, shape-controlled, single-crystal nanoparticles.

Graphical abstract: Shape-controlled electrodeposition of single Pt nanocrystals onto carbon nanoelectrodes

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Publication details

The article was received on 05 Feb 2018, accepted on 08 Feb 2018 and first published on 28 Mar 2018


Article type: Paper
DOI: 10.1039/C8FD00018B
Citation: Faraday Discuss., 2018, Advance Article
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    Shape-controlled electrodeposition of single Pt nanocrystals onto carbon nanoelectrodes

    K. Huang, J. Clausmeyer, L. Luo, K. Jarvis and R. M. Crooks, Faraday Discuss., 2018, Advance Article , DOI: 10.1039/C8FD00018B

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