Site-selectively Pt-decorated PdPt bimetallic nanosheets characterized by electrocatalytic property for methanol oxidation

被引：20
作者：
Lee, Young Wook [1 ,2 ]
Han, Sang Woo [1 ,2 ]
Lee, Kang Yeol [3 ]
机构：
[1] Korea Adv Inst Sci & Technol, Dept Chem, Ctr Nanotecton, Daejeon 34141, South Korea
[2] Korea Adv Inst Sci & Technol, KI Nano Century, Daejeon 34141, South Korea
[3] Gyeongsang Natl Univ, Res Inst Nat Sci, Jinju 52828, South Korea
来源：
MATERIALS CHEMISTRY AND PHYSICS | 2018年 / 214卷
基金：
新加坡国家研究基金会;
关键词：
Pd nanosheets; Site-selectively Pt-Decorated PdPt; bimetallic nanosheets; Methanol oxidation; Electrocatalysis; REDUCED GRAPHENE OXIDE; ONE-POT SYNTHESIS; FACILE SYNTHESIS; EFFICIENT REMOVAL; ENHANCED ACTIVITY; NANOPARTICLES; NANOCRYSTALS; ELECTROOXIDATION; REDUCTION; SHAPE;
D O I：
10.1016/j.matchemphys.2018.04.072
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this work, a facile synthetic method for site-selectively Pt-decorated PdPt bimetallic nanosheets (S-Pt-PdPtBN) has been described. The size, structure, and composition distribution of the synthesized S-Pt-PdPtBN were determined by transmission electron microscopy, scanning electron microscopy, energy dispersive X-ray spectroscopy, and X-ray diffraction. The electrocatalytic activity of these bimetallic nanosheets was examined for the oxidation of methanol in an acidic solution. The electrochemically active surface area (ECSA) of S-Pt-PdPtBN was 0.842 cm(2). This value is slightly lower than the ECSA (1.012 cm(2)) of the commercial Pt/C (Alpha, Pt 10%) electrode. Interestingly, even though the ECSA of the S-Pt-PdPtBN/C was smaller than that of the commercial Pt/C, the forward peak current density of the former (2.95 mA cm(-2)) was ca. 1.5 times higher than that of the latter (2.05 mA cm(-2)). Moreover, the current density of the S-Pt-PdPtBN/C catalysts was high even after 800 s of continuous electrocatalysis at 0.5 V. This current density is six times that of commercial Pt/C catalysts. Thus, the synthesized S-Pt-PdPtBN exhibited significantly enhanced electrocatalytic activity and better stability than the commercial Pt/C catalyst for methanol oxidation. (C) 2018 Elsevier B.V. All rights reserved.
引用
收藏
页码：201 / 208
页数：8
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