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^*

^*此作品的通讯作者

化学学院

University of Illinois at Urbana-Champaign

科研成果: 期刊稿件 › 文章 › 同行评审

161 引用（Scopus）

摘要

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).

源语言	英语
页（从-至）	2870-2874
页数	5
期刊	Nano Letters
卷	13
期	6
DOI	https://doi.org/10.1021/nl401214d
出版状态	已出版 - 12 6月 2013

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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",

year = "2013",

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day = "12",

doi = "10.1021/nl401214d",

language = "英语",

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journal = "Nano Letters",

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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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