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Tuning Ion Complexing To Rapidly Prepare Hollow Ag–Pt Nanowires with High Activity toward the Methanol Oxidization Reaction
Author(s) -
Liu Fangyan,
Qi Peimei,
Liang Xiaoli,
Chen Wei,
Li Benxia,
Zhang Lijie,
Yang Yun,
Huang Shaoming
Publication year - 2018
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201804250
Subject(s) - redox , nanowire , methanol , materials science , catalysis , galvanic cell , chemical engineering , nanotechnology , nanoscopic scale , chemistry , metallurgy , organic chemistry , engineering
Hollow Pt‐based nanowires (NWs) have important applications in catalysis. Their preparation often involves a two‐step process in which M (M=Ag, Pd, Co, Ni) NWs are prepared and subsequently subjected to galvanic reaction in solution containing a Pt precursor. It is challenging to achieve a simple one‐step preparation, because the redox potential of Pt IV /Pt or Pt II /Pt to Pt is high, and therefore, Pt atoms always form first. This work demonstrates that an appropriate pH can decrease the redox potential of Pt IV /Pt and allows the one‐step preparation of high‐quality hollow Pt–Ag NWs rapidly (10 min). Moreover, it is easy to realize large‐scale preparation with this method. The NW composition can be adjusted readily to optimize their performance in the electrocatalytic methanol oxidization reaction (MOR). Compared with commercial Pt/C, NWs with appropriate Ag/Pt ratios exhibit high stability, activity, and CO tolerance ability.