Highly uniform platinum icosahedra made by hot injection-assisted GRAILS method

Wei Zhou; Jianbo Wu; Hong Yang

doi:10.1021/nl401214d

Highly uniform platinum icosahedra made by hot injection-assisted GRAILS method

Wei Zhou
, Jianbo Wu
, Hong Yang^*

^*Corresponding author for this work

School of Chemistry

University of Illinois at Urbana-Champaign

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

161 Scopus citations

Abstract

Highly uniform Pt icosahedral nanocrystals with an edge length of 8.8 nm were synthesized in nonhydrolytic systems using the hot injection-assisted GRAILS (gas reducing agent in liquid solution) method. The results show the key factors for the shape control include fast nucleation, kinetically controlled growth, and protection from oxidation by air. The effect of oxygen molecules on the Pt morphology was experimentally confirmed based on the study of shape evolution of icosahedral crystals upon exposure to oxygen gas. The Pt icosahedral catalysts obtained had an area-specific activity of 0.83 mA/cm ² Pt, four times that of 0.20 mA/cm² Pt for typical Pt/C catalysts, in an oxygen reduction reaction (ORR).

Original language	English
Pages (from-to)	2870-2874
Number of pages	5
Journal	Nano Letters
Volume	13
Issue number	6
DOIs	https://doi.org/10.1021/nl401214d
State	Published - 12 Jun 2013

Keywords

ORR
Pt
carbon monoxide
cube
icosahedron
nanocrystal
oxygen reduction reaction

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10.1021/nl401214d

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title = "Highly uniform platinum icosahedra made by hot injection-assisted GRAILS method",

abstract = "Highly uniform Pt icosahedral nanocrystals with an edge length of 8.8 nm were synthesized in nonhydrolytic systems using the hot injection-assisted GRAILS (gas reducing agent in liquid solution) method. The results show the key factors for the shape control include fast nucleation, kinetically controlled growth, and protection from oxidation by air. The effect of oxygen molecules on the Pt morphology was experimentally confirmed based on the study of shape evolution of icosahedral crystals upon exposure to oxygen gas. The Pt icosahedral catalysts obtained had an area-specific activity of 0.83 mA/cm 2 Pt, four times that of 0.20 mA/cm2 Pt for typical Pt/C catalysts, in an oxygen reduction reaction (ORR).",

keywords = "ORR, Pt, carbon monoxide, cube, icosahedron, nanocrystal, oxygen reduction reaction",

author = "Wei Zhou and Jianbo Wu and Hong Yang",

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doi = "10.1021/nl401214d",

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T1 - Highly uniform platinum icosahedra made by hot injection-assisted GRAILS method

AU - Zhou, Wei

AU - Wu, Jianbo

AU - Yang, Hong

PY - 2013/6/12

Y1 - 2013/6/12

N2 - Highly uniform Pt icosahedral nanocrystals with an edge length of 8.8 nm were synthesized in nonhydrolytic systems using the hot injection-assisted GRAILS (gas reducing agent in liquid solution) method. The results show the key factors for the shape control include fast nucleation, kinetically controlled growth, and protection from oxidation by air. The effect of oxygen molecules on the Pt morphology was experimentally confirmed based on the study of shape evolution of icosahedral crystals upon exposure to oxygen gas. The Pt icosahedral catalysts obtained had an area-specific activity of 0.83 mA/cm 2 Pt, four times that of 0.20 mA/cm2 Pt for typical Pt/C catalysts, in an oxygen reduction reaction (ORR).

AB - Highly uniform Pt icosahedral nanocrystals with an edge length of 8.8 nm were synthesized in nonhydrolytic systems using the hot injection-assisted GRAILS (gas reducing agent in liquid solution) method. The results show the key factors for the shape control include fast nucleation, kinetically controlled growth, and protection from oxidation by air. The effect of oxygen molecules on the Pt morphology was experimentally confirmed based on the study of shape evolution of icosahedral crystals upon exposure to oxygen gas. The Pt icosahedral catalysts obtained had an area-specific activity of 0.83 mA/cm 2 Pt, four times that of 0.20 mA/cm2 Pt for typical Pt/C catalysts, in an oxygen reduction reaction (ORR).

KW - ORR

KW - Pt

KW - carbon monoxide

KW - cube

KW - icosahedron

KW - nanocrystal

KW - oxygen reduction reaction

UR - https://www.scopus.com/pages/publications/84879090551

U2 - 10.1021/nl401214d

DO - 10.1021/nl401214d

M3 - 文章

AN - SCOPUS:84879090551

SN - 1530-6984

VL - 13

SP - 2870

EP - 2874

JO - Nano Letters

JF - Nano Letters

IS - 6

ER -

Highly uniform platinum icosahedra made by hot injection-assisted GRAILS method

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Keywords

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