Facile design of Au@Pt core-shell nanostructures: Formation of Pt submonolayers with tunable coverage and their applications in electrocatalysis

Fulin Zheng; Wing Tak Wong; Ka Fu Yung

doi:10.1007/s12274-014-0407-1

Facile design of Au@Pt core-shell nanostructures: Formation of Pt submonolayers with tunable coverage and their applications in electrocatalysis

Fulin Zheng, Wing Tak Wong, Ka Fu Yung

Research output: Journal article publication › Journal article › Academic research › peer-review

40 Citations (Scopus)

Abstract

A facile design of Pt nanostructures from submonolayer to monolayer has been realized by ion adsorption-in situ electrochemical reduction on Au nanoparticles supported on multiwall carbon nanotubes (CNTs). The as prepared Au@Pt/CNTs catalysts display coverage-specific electrocatalysis. Au@Pt/CNTs with low Pt coverage is inactive towards methanol oxidation whereas it oxidizes formic acid effectively through a direct pathway with mass specific activity 90 times that of a commercial Pt/C catalyst. Due to its inertness to methanol, it shows high performance in the oxygen reduction reaction (ORR) with high methanol tolerance. In contrast, simply increasing the Pt coverage to above 40% switches the formic acid oxidation process to both direct and indirect catalytic pathways, and also results in high methanol oxidation activity. [Figure not available: see fulltext.]

Original language	English
Pages (from-to)	410-417
Number of pages	8
Journal	Nano Research
Volume	7
Issue number	3
DOIs	https://doi.org/10.1007/s12274-014-0407-1
Publication status	Published - 1 Jan 2014

Keywords

electrocatalysis
fuel cell
platinum
submonolayer

ASJC Scopus subject areas

Materials Science(all)
Electrical and Electronic Engineering

More information

10.1007/s12274-014-0407-1

Cite this

@article{60cdf3328cc741b59f0a208cf55a52fe,

title = "Facile design of Au@Pt core-shell nanostructures: Formation of Pt submonolayers with tunable coverage and their applications in electrocatalysis",

abstract = "A facile design of Pt nanostructures from submonolayer to monolayer has been realized by ion adsorption-in situ electrochemical reduction on Au nanoparticles supported on multiwall carbon nanotubes (CNTs). The as prepared Au@Pt/CNTs catalysts display coverage-specific electrocatalysis. Au@Pt/CNTs with low Pt coverage is inactive towards methanol oxidation whereas it oxidizes formic acid effectively through a direct pathway with mass specific activity 90 times that of a commercial Pt/C catalyst. Due to its inertness to methanol, it shows high performance in the oxygen reduction reaction (ORR) with high methanol tolerance. In contrast, simply increasing the Pt coverage to above 40% switches the formic acid oxidation process to both direct and indirect catalytic pathways, and also results in high methanol oxidation activity. [Figure not available: see fulltext.]",

keywords = "electrocatalysis, fuel cell, platinum, submonolayer",

author = "Fulin Zheng and Wong, {Wing Tak} and Yung, {Ka Fu}",

year = "2014",

month = jan,

day = "1",

doi = "10.1007/s12274-014-0407-1",

language = "English",

volume = "7",

pages = "410--417",

journal = "Nano Research",

issn = "1998-0124",

publisher = "Press of Tsinghua University",

number = "3",

}

TY - JOUR

T1 - Facile design of Au@Pt core-shell nanostructures: Formation of Pt submonolayers with tunable coverage and their applications in electrocatalysis

AU - Zheng, Fulin

AU - Wong, Wing Tak

AU - Yung, Ka Fu

PY - 2014/1/1

Y1 - 2014/1/1

N2 - A facile design of Pt nanostructures from submonolayer to monolayer has been realized by ion adsorption-in situ electrochemical reduction on Au nanoparticles supported on multiwall carbon nanotubes (CNTs). The as prepared Au@Pt/CNTs catalysts display coverage-specific electrocatalysis. Au@Pt/CNTs with low Pt coverage is inactive towards methanol oxidation whereas it oxidizes formic acid effectively through a direct pathway with mass specific activity 90 times that of a commercial Pt/C catalyst. Due to its inertness to methanol, it shows high performance in the oxygen reduction reaction (ORR) with high methanol tolerance. In contrast, simply increasing the Pt coverage to above 40% switches the formic acid oxidation process to both direct and indirect catalytic pathways, and also results in high methanol oxidation activity. [Figure not available: see fulltext.]

AB - A facile design of Pt nanostructures from submonolayer to monolayer has been realized by ion adsorption-in situ electrochemical reduction on Au nanoparticles supported on multiwall carbon nanotubes (CNTs). The as prepared Au@Pt/CNTs catalysts display coverage-specific electrocatalysis. Au@Pt/CNTs with low Pt coverage is inactive towards methanol oxidation whereas it oxidizes formic acid effectively through a direct pathway with mass specific activity 90 times that of a commercial Pt/C catalyst. Due to its inertness to methanol, it shows high performance in the oxygen reduction reaction (ORR) with high methanol tolerance. In contrast, simply increasing the Pt coverage to above 40% switches the formic acid oxidation process to both direct and indirect catalytic pathways, and also results in high methanol oxidation activity. [Figure not available: see fulltext.]

KW - electrocatalysis

KW - fuel cell

KW - platinum

KW - submonolayer

UR - http://www.scopus.com/inward/record.url?scp=84897023613&partnerID=8YFLogxK

U2 - 10.1007/s12274-014-0407-1

DO - 10.1007/s12274-014-0407-1

M3 - Journal article

SN - 1998-0124

VL - 7

SP - 410

EP - 417

JO - Nano Research

JF - Nano Research

IS - 3

ER -

Facile design of Au@Pt core-shell nanostructures: Formation of Pt submonolayers with tunable coverage and their applications in electrocatalysis

Abstract

Keywords

ASJC Scopus subject areas

More information

Other files and links

Fingerprint

Cite this