Please use this identifier to cite or link to this item:
Title: Platinum multicubes prepared by Ni 2+ -mediated shape evolution exhibit high electrocatalytic activity for oxygen reduction
Authors: Ma, Liang
Wang, Chengming
Xia, Bao Yu
Mao, Keke
He, Jiawei
Wu, Xiaojun
Xiong, Yujie
Lou, Xiong Wen David
Keywords: DRNTU::Science::Chemistry::Physical chemistry::Electrochemistry
Issue Date: 2015
Source: Ma, L., Wang, C., Xia, B. Y., Mao, K., He, J., Wu, X., et al. (2015). Platinum multicubes prepared by Ni 2+ -mediated shape evolution exhibit high electrocatalytic activity for oxygen reduction. Angewandte chemie International edition, 54(19), 5666-5671.
Series/Report no.: Angewandte Chemie International Edition
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.
ISSN: 1433-7851
DOI: 10.1002/anie.201500947
Rights: © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:SCBE Journal Articles

Google ScholarTM



Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.