Volume 210, 2018

Shape-controlled electrodeposition of single Pt nanocrystals onto carbon nanoelectrodes

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

Associated articles

Article information

Article type
Paper
Submitted
05 feb. 2018
Accepted
08 feb. 2018
First published
28 mar. 2018

Faraday Discuss., 2018,210, 267-280

Author version available

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, 210, 267 DOI: 10.1039/C8FD00018B

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