Issue 6, 2022

Realization of the dehydrogenation pathway of formic acid oxidation by ultra-small core–shell Au–Pt nanoparticles with discrete Pt shells

Abstract

In this work, ultra-small core–shell Au–Pt nanoparticles with discrete Pt shells (denoted as USCSD Au–Pt NPs) were successfully prepared by Fe(II)-assisted one-pot co-reduction of Au(III) ions and an ultra-low concentration of Pt(II) ions in citrate solution. In the as-prepared USCSD Au–Pt NPs, the Pt atoms on their outer surfaces are effectively isolated by Au atoms (denoted as a discrete shell, CSD). Furthermore, the as-prepared USCSD Au–Pt NPs are determined to be USCSD Au61.2@Au27.3Pt11.5 NPs with an average size of 2.3 nm using a number of characterization techniques, including transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDS), cyclic voltammetry (CV), CO stripping voltammetry and X-ray photoelectron spectroscopy (XPS). Moreover, the as-prepared USCSD Au61.2@Au27.3Pt11.5-NP/C catalysts towards the formic acid oxidation reaction (FAOR) proceed through the direct pathway (dehydrogenation). In addition, their mass activity and specific activity towards the FAOR are 6.91 A mgPt−1 and 4.88 mA cm−2, which are about 16.8 and 7.33 times higher than those (0.4 A mgPt−1 and 0.67 mA cm−2) of commercial Pt/C catalysts, respectively.

Graphical abstract: Realization of the dehydrogenation pathway of formic acid oxidation by ultra-small core–shell Au–Pt nanoparticles with discrete Pt shells

Supplementary files

Article information

Article type
Paper
Submitted
20 Dec 2021
Accepted
06 Feb 2022
First published
07 Feb 2022
This article is Open Access
Creative Commons BY license

Mater. Adv., 2022,3, 2786-2792

Realization of the dehydrogenation pathway of formic acid oxidation by ultra-small core–shell Au–Pt nanoparticles with discrete Pt shells

Y. Cao, X. Zhang, X. Yue, M. Zhang, W. Du and H. Xia, Mater. Adv., 2022, 3, 2786 DOI: 10.1039/D1MA01204E

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