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Title: Ir-skinned Ir-Cu nanoparticles with enhanced activity for oxygen reduction reaction
Authors: Wang, Jiarui
Zhou, Ye
Sun, Libo
Ge, Jingjie
Wang, Jingxian
Dai, Chencheng
Xu, Zhichuan Jason
Keywords: Science::Chemistry
Issue Date: 2020
Source: Wang, J., Zhou, Y., Sun, L., Ge, J., Wang, J., Dai, C. & Xu, Z. J. (2020). Ir-skinned Ir-Cu nanoparticles with enhanced activity for oxygen reduction reaction. Chemical Research in Chinese Universities, 36(3), 467-472.
Project: MOE2017-T2-1-009 
Journal: Chemical Research in Chinese Universities 
Abstract: The development of methanol-tolerate oxygen reduction reaction(ORR) electrocatalysts is of special significance to direct methanol fuel cells system. Iridium is known for its better methanol tolerance than platinum and able to survive in harsh acidic environment. However, its activity is relatively low and thus the approach to improve Ir’s ORR is desired. Herein, bimetallic Ir-Cu nanoparticles(NPs) with controllable Ir/Cu compositions(ca. 1:2 to 4:1, atomic ratio) are synthesized via a galvanic replacement-based chemical method. The as-synthesized Ir-Cu NPs are investigated as ORR catalysts after electrochemically leaching out the surface Cu and forming Ir-skinned structures. Around 2- to 3-fold enhancement in the intrinsic activity has been observed in these Ir-skinned Ir-Cu catalysts compared to Ir counterpart. The approach is demonstrated to be a promising way to prepare efficient Ir ORR catalysts and lower catalyst cost.
ISSN: 1005-9040
DOI: 10.1007/s40242-020-0087-1
Schools: School of Materials Science and Engineering 
Interdisciplinary Graduate School (IGS) 
Research Centres: Solar Fuels Laboratory 
Energy Research Institute @ NTU (ERI@N) 
Rights: © 2020 Jilin University, The Editorial Department of Chemical Research in Chinese Universities and Springer-Verlag GmbH. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:ERI@N Journal Articles
IGS Journal Articles
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