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Layer‐by‐Layer Motif Architectures: Programmed Electrochemical Syntheses of Multilayer Mesoporous Metallic Films with Uniformly Sized Pores
Author(s) -
Jiang Bo,
Li Cuiling,
Qian Huayu,
Hossain Md. Shahriar A.,
Malgras Victor,
Yamauchi Yusuke
Publication year - 2017
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201703609
Subject(s) - mesoporous material , materials science , bimetallic strip , electrolyte , electrochemistry , mesoporous organosilica , layer by layer , nanotechnology , layer (electronics) , mesoporous silica , chemical engineering , metal , polymer , thin film , electrode , catalysis , chemistry , organic chemistry , engineering , metallurgy , composite material
Although multilayer films have been extensively reported, most compositions have been limited to non‐catalytically active materials (e.g. polymers, proteins, lipids, or nucleic acids). Herein, we report the preparation of binder‐free multilayer metallic mesoporous films with sufficient accessibility for high electrocatalytic activity by using a programmed electrochemical strategy. By precisely tuning the deposition potential and duration, multilayer mesoporous architectures consisting of alternating mesoporous Pd layers and mesoporous PdPt layers with controlled layer thicknesses can be synthesized within a single electrolyte, containing polymeric micelles as soft templates. This novel architecture, combining the advantages of bimetallic alloys, multilayer architectures, and mesoporous structures, exhibits high electrocatalytic activity for both the methanol oxidation reaction (MOR) and the ethanol oxidation reaction (EOR).