Ultrathin dendritic Pt3Cu triangular pyramid caps with enhanced electrocatalytic activity

Yun Kuang; Zhao Cai; Ying Zhang; Dongsheng He; Xiuling Yan; Yongmin Bi; Yaping Li; Zi Li; Xiaoming Sun

doi:10.1021/am5041412

Ultrathin dendritic Pt₃Cu triangular pyramid caps with enhanced electrocatalytic activity

Yun Kuang, Zhao Cai, Ying Zhang, Dongsheng He, Xiuling Yan, Yongmin Bi, Yaping Li, Zi Li, Xiaoming Sun

Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

53 Citations (Scopus)

Abstract

Here we report on the synthesis of novel dendritic Pt₃Cu triangular pyramid caps via a solvothermal coreduction method. These caps had three-dimensional caved structures with ultrathin branches, as evidenced by high-resolution transmission electron microscopy (HRTEM) and HAADF-STEM characterization. Tuning the reduction kinetics of two metal precursors by an iodide ion was believed to be the key for the formation of an alloyed nanostructure. Electro-oxidation of methanol and formic acid showed dramatically improved electrocatalytic activities and poison-tolerance for these nanoalloys as compared to commercial Pt/C catalysts, which was attributed to their unique open porous structure with interconnected network, ultrahigh surface areas, as well as synergetic effect of the two metallic components.

Original language	English
Pages (from-to)	17748-17752
Number of pages	5
Journal	ACS Applied Materials & Interfaces
Volume	6
Issue number	20
Early online date	7 Oct 2014
DOIs	https://doi.org/10.1021/am5041412
Publication status	Published - 22 Oct 2014

Keywords

anti-CO poisoning
dendritic pyramid cap
fuel oxidation
Pt3Cu alloy
ultrathin branch

ASJC Scopus subject areas

General Materials Science

Access to Document

10.1021/am5041412Licence: None: All rights reserved

https://doi.org/10.1021/am5041412Licence: None: All rights reserved

Towards an Atomic-scale understanding of the 3D Structures of size-selected Clusters on Surfaces
Li, Z., Johnston, R. & Palmer, R.
Engineering & Physical Science Research Council
1/02/10 → 17/01/14
Project: Research Councils

Cite this

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title = "Ultrathin dendritic Pt3Cu triangular pyramid caps with enhanced electrocatalytic activity",

abstract = "Here we report on the synthesis of novel dendritic Pt3Cu triangular pyramid caps via a solvothermal coreduction method. These caps had three-dimensional caved structures with ultrathin branches, as evidenced by high-resolution transmission electron microscopy (HRTEM) and HAADF-STEM characterization. Tuning the reduction kinetics of two metal precursors by an iodide ion was believed to be the key for the formation of an alloyed nanostructure. Electro-oxidation of methanol and formic acid showed dramatically improved electrocatalytic activities and poison-tolerance for these nanoalloys as compared to commercial Pt/C catalysts, which was attributed to their unique open porous structure with interconnected network, ultrahigh surface areas, as well as synergetic effect of the two metallic components.",

keywords = "anti-CO poisoning, dendritic pyramid cap, fuel oxidation, Pt3Cu alloy, ultrathin branch",

author = "Yun Kuang and Zhao Cai and Ying Zhang and Dongsheng He and Xiuling Yan and Yongmin Bi and Yaping Li and Zi Li and Xiaoming Sun",

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T1 - Ultrathin dendritic Pt3Cu triangular pyramid caps with enhanced electrocatalytic activity

AU - Kuang, Yun

AU - Cai, Zhao

AU - Zhang, Ying

AU - He, Dongsheng

AU - Yan, Xiuling

AU - Bi, Yongmin

AU - Li, Yaping

AU - Li, Zi

AU - Sun, Xiaoming

PY - 2014/10/22

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AB - Here we report on the synthesis of novel dendritic Pt3Cu triangular pyramid caps via a solvothermal coreduction method. These caps had three-dimensional caved structures with ultrathin branches, as evidenced by high-resolution transmission electron microscopy (HRTEM) and HAADF-STEM characterization. Tuning the reduction kinetics of two metal precursors by an iodide ion was believed to be the key for the formation of an alloyed nanostructure. Electro-oxidation of methanol and formic acid showed dramatically improved electrocatalytic activities and poison-tolerance for these nanoalloys as compared to commercial Pt/C catalysts, which was attributed to their unique open porous structure with interconnected network, ultrahigh surface areas, as well as synergetic effect of the two metallic components.

KW - anti-CO poisoning

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KW - fuel oxidation

KW - Pt3Cu alloy

KW - ultrathin branch

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