A one-step, clean, capping-agent-free electrochemical approach to prepare Pt nanoparticles with preferential (100) orientation and their high electrocatalytic activities

摘要

A clean and simple electrodeposition method without the use of any organic additives has been reported to prepare platinum nanopartides with preferential (100) orientation directly on the conductive substrate. The formation of platinum nanoparticles exposing (100) facets was confirmed by electrochemical methods and high-resolution transmission electron microscopy. The fraction of Pt (100) sites increases as the electrodeposition current density increases from 0.2 to 10 mA cm(-2). Furthermore, as the Pt (100) fraction increases, the specific activity of the Pt particles for ammonia oxidation increases obviously. (C) 2015 Elsevier B.V. All rights reserved.