Issue 44, 2018

Robust synthesis of ultrathin Au–Ag nanowires as a high-surface-area, synergistic substrate for constructing efficient Pt-based catalysts

Abstract

Ultrathin Au (or Ag) nanowires represent an excellent substrate for atomic layer deposition of Pt to afford highly active and cost-effective catalysts due to the large surface area and possible synergistic effect. An ideal synthesis of such nanowires should avoid using strong capping agents for convenient post-synthesis treatments and should be easily scaled up and reproduced in a high yield, which remains a challenge. Here, we report a novel strategy to synthesize sub-2 nm Au–Ag alloy nanowires with high quality in N,N-dimethyl formamide (DMF), which relies on Ag modification of the nanocrystal surface and Ag–halide interactions for regulating the one-dimensional growth of the nanowires, without involving strong capping agents that are usually required in conventional syntheses. Sub-monolayer Pt atoms were successfully deposited on these ultrathin Au–Ag alloy nanowires without forming ensembles despite a high loading amount (up to 20% in terms of Pt/(Au + Ag)) due to the large surface area. The resulting Au–Ag@Pt core/shell nanowires demonstrate superior activities in the formic acid oxidation reaction (FAOR) due to the synergistic ligand effect and the absence of Pt ensembles. We believe that the novel synthesis and the demonstration of these ultrathin Au–Ag alloy nanowires as a general platform for constructing cost-effective noble metal catalysts open new opportunities in designing catalysts for a broad range of reactions.

Graphical abstract: Robust synthesis of ultrathin Au–Ag nanowires as a high-surface-area, synergistic substrate for constructing efficient Pt-based catalysts

Supplementary files

Article information

Article type
Paper
Submitted
14 jun 2018
Accepted
10 ago 2018
First published
10 ago 2018

J. Mater. Chem. A, 2018,6, 22161-22169

Robust synthesis of ultrathin Au–Ag nanowires as a high-surface-area, synergistic substrate for constructing efficient Pt-based catalysts

S. Zhang, L. Zhang, Z. Liu, M. Liu, Q. Fan, K. Liu and C. Gao, J. Mater. Chem. A, 2018, 6, 22161 DOI: 10.1039/C8TA05663C

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements