Platinum multicubes prepared by Ni2+-mediated shape evolution exhibit high electrocatalytic activity for oxygen reduction

Liang Ma; Chengming Wang; Bao Yu Xia; Keke Mao; Jiawei He; Xiaojun Wu; Yujie Xiong; Xiong Wen Lou

doi:10.1002/anie.201500947

Platinum multicubes prepared by Ni²⁺-mediated shape evolution exhibit high electrocatalytic activity for oxygen reduction

Liang Ma
, Chengming Wang
, Bao Yu Xia
, Keke Mao
, Jiawei He
, Xiaojun Wu
, Yujie Xiong^*
, Xiong Wen Lou

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

91 Citations (Scopus)

Abstract

Pt(100) facets are generally considered less active for the oxygen reduction reaction (ORR). Reported herein is a unique Pt-branched structure, a multicube, whose surface is mostly enclosed by {100} facets but contains high-index facets at the small junction area between the adjacent cubic components. The synthesis is accomplished by a Ni<sup>2+</sup>-mediated facet evolution from high-index {311} to {100} facets on the frameworks of multipods. Despite the high {100} facet coverage, the Pt multicubes exhibit impressive ORR activity in terms of half-wave potential and current density nearly to the level of the most active Pt-based catalysts, while the durability of catalysts is well retained. The facet evolution creates a set of samples with tunable ratios of high-index to low-index facets. The results reveal that the excellent ORR performance of Pt multicubes is a combined result of active sites by high-index facets and low resistance by flat surface. It is anticipated that this work will offer a new approach to facet-controlled synthesis and ORR catalysts design. Facet to facet: A Ni<sup>2+</sup>-mediated facet-evolution approach has been developed to synthesize novel Pt multicubes whose surface is mostly enclosed by {100} facets. The Pt multicubes exhibit very high electrocatalytic activity and remarkable durability in the oxygen reduction reaction because of the high-index facets at the junction between the cubic components. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Original language	English
Pages (from-to)	5666-5671
Journal	Angewandte Chemie - International Edition
Volume	54
Issue number	19
DOIs	https://doi.org/10.1002/anie.201500947
Publication status	Published - 4 May 2015
Externally published	Yes

Bibliographical note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

Funding

This work was financially supported by the NSFC (No. 21101145),the Recruitment Program of Global Experts, the CAS Hundred Talent Program, the Anhui Provincial Natural Science Foundation(No. 1508085MB24), and the Fundamental Research Funds for the Central Universities (No. WK2060190025, WK2090050027,WK2310000035).

Research Keywords

electrochemistry
nanostructures
oxygen
platinum
surface analysis

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Cite this

@article{fb716315aa824a9aa83b0e034b155437,

title = "Platinum multicubes prepared by Ni2+-mediated shape evolution exhibit high electrocatalytic activity for oxygen reduction",

abstract = "Pt(100) facets are generally considered less active for the oxygen reduction reaction (ORR). Reported herein is a unique Pt-branched structure, a multicube, whose surface is mostly enclosed by \{100\} facets but contains high-index facets at the small junction area between the adjacent cubic components. The synthesis is accomplished by a Ni2+-mediated facet evolution from high-index \{311\} to \{100\} facets on the frameworks of multipods. Despite the high \{100\} facet coverage, the Pt multicubes exhibit impressive ORR activity in terms of half-wave potential and current density nearly to the level of the most active Pt-based catalysts, while the durability of catalysts is well retained. The facet evolution creates a set of samples with tunable ratios of high-index to low-index facets. The results reveal that the excellent ORR performance of Pt multicubes is a combined result of active sites by high-index facets and low resistance by flat surface. It is anticipated that this work will offer a new approach to facet-controlled synthesis and ORR catalysts design. Facet to facet: A Ni2+-mediated facet-evolution approach has been developed to synthesize novel Pt multicubes whose surface is mostly enclosed by \{100\} facets. The Pt multicubes exhibit very high electrocatalytic activity and remarkable durability in the oxygen reduction reaction because of the high-index facets at the junction between the cubic components. {\textcopyright} 2015 WILEY-VCH Verlag GmbH \& Co. KGaA, Weinheim.",

keywords = "electrochemistry, nanostructures, oxygen, platinum, surface analysis",

author = "Liang Ma and Chengming Wang and Xia, \{Bao Yu\} and Keke Mao and Jiawei He and Xiaojun Wu and Yujie Xiong and Lou, \{Xiong Wen\}",

note = "Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].",

year = "2015",

month = may,

day = "4",

doi = "10.1002/anie.201500947",

language = "English",

volume = "54",

pages = "5666--5671",

journal = "Angewandte Chemie - International Edition",

issn = "1433-7851",

publisher = "John Wiley \& Sons",

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Platinum multicubes prepared by Ni²⁺-mediated shape evolution exhibit high electrocatalytic activity for oxygen reduction. / Ma, Liang; Wang, Chengming; Xia, Bao Yu et al.
In: Angewandte Chemie - International Edition, Vol. 54, No. 19, 04.05.2015, p. 5666-5671.

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

TY - JOUR

T1 - Platinum multicubes prepared by Ni2+-mediated shape evolution exhibit high electrocatalytic activity for oxygen reduction

AU - Ma, Liang

AU - Wang, Chengming

AU - Xia, Bao Yu

AU - Mao, Keke

AU - He, Jiawei

AU - Wu, Xiaojun

AU - Xiong, Yujie

AU - Lou, Xiong Wen

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

PY - 2015/5/4

Y1 - 2015/5/4

N2 - Pt(100) facets are generally considered less active for the oxygen reduction reaction (ORR). Reported herein is a unique Pt-branched structure, a multicube, whose surface is mostly enclosed by {100} facets but contains high-index facets at the small junction area between the adjacent cubic components. The synthesis is accomplished by a Ni2+-mediated facet evolution from high-index {311} to {100} facets on the frameworks of multipods. Despite the high {100} facet coverage, the Pt multicubes exhibit impressive ORR activity in terms of half-wave potential and current density nearly to the level of the most active Pt-based catalysts, while the durability of catalysts is well retained. The facet evolution creates a set of samples with tunable ratios of high-index to low-index facets. The results reveal that the excellent ORR performance of Pt multicubes is a combined result of active sites by high-index facets and low resistance by flat surface. It is anticipated that this work will offer a new approach to facet-controlled synthesis and ORR catalysts design. Facet to facet: A Ni2+-mediated facet-evolution approach has been developed to synthesize novel Pt multicubes whose surface is mostly enclosed by {100} facets. The Pt multicubes exhibit very high electrocatalytic activity and remarkable durability in the oxygen reduction reaction because of the high-index facets at the junction between the cubic components. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

AB - Pt(100) facets are generally considered less active for the oxygen reduction reaction (ORR). Reported herein is a unique Pt-branched structure, a multicube, whose surface is mostly enclosed by {100} facets but contains high-index facets at the small junction area between the adjacent cubic components. The synthesis is accomplished by a Ni2+-mediated facet evolution from high-index {311} to {100} facets on the frameworks of multipods. Despite the high {100} facet coverage, the Pt multicubes exhibit impressive ORR activity in terms of half-wave potential and current density nearly to the level of the most active Pt-based catalysts, while the durability of catalysts is well retained. The facet evolution creates a set of samples with tunable ratios of high-index to low-index facets. The results reveal that the excellent ORR performance of Pt multicubes is a combined result of active sites by high-index facets and low resistance by flat surface. It is anticipated that this work will offer a new approach to facet-controlled synthesis and ORR catalysts design. Facet to facet: A Ni2+-mediated facet-evolution approach has been developed to synthesize novel Pt multicubes whose surface is mostly enclosed by {100} facets. The Pt multicubes exhibit very high electrocatalytic activity and remarkable durability in the oxygen reduction reaction because of the high-index facets at the junction between the cubic components. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

KW - electrochemistry

KW - nanostructures

KW - oxygen

KW - platinum

KW - surface analysis

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U2 - 10.1002/anie.201500947

DO - 10.1002/anie.201500947

M3 - RGC 21 - Publication in refereed journal

SN - 1433-7851

VL - 54

SP - 5666

EP - 5671

JO - Angewandte Chemie - International Edition

JF - Angewandte Chemie - International Edition

IS - 19

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