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Platinum–Copper Rhombic Dodecahedral Nanoframes with Tunable Channels as Efficient Bifunctional Electrocatalysts for Fuel‐Cell Reactions
Author(s) -
Sun Xiuhui,
Huang Bin,
Cui Xiaoneng,
E Bin,
Feng Yonggang,
Huang Xiaoqing
Publication year - 2018
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201701768
Subject(s) - dodecahedron , bifunctional , catalysis , platinum , materials science , electrocatalyst , copper , chemical engineering , nanotechnology , nanocrystal , methanol , crystallography , chemistry , metallurgy , electrode , electrochemistry , organic chemistry , engineering
Three‐dimensional (3 D) nanoframes (NFs) with interconnected edges and large surface areas represent a new class of nanostructures with advanced catalytic performance. Herein, we report an efficient chemical strategy for the controlled synthesis of platinum–copper (Pt–Cu) rhombic dodecahedral nanocrystals (RDH NCs) with highly composition‐segregated features. These solid Pt–Cu RDH NCs could be readily transformed into highly open Pt–Cu RDH nanoframes (NFs) with shapes and sizes that were not markedly changed after FeCl 3 etching. All of the different Pt–Cu RDH NFs have the same PtCu 3 phase but tunable sizes and different channel sizes. These important characteristics of the NFs provide them with much better performance than that observed for commercial Pt/C and Pt–Cu RDH NCs towards both the oxygen reduction reaction (ORR) and the methanol oxidation reaction (MOR). In particular, PtCu 5 RDH NFs with the largest channel size of all the samples investigated exhibited the best activity towards the ORR and MOR and showed much less activity decay after durability tests. This work highlights the importance of precise control of 3 D NF structures in enhancing electrocatalysis electrooxidations.