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Self‐Supported PtAuP Alloy Nanotube Arrays with Enhanced Activity and Stability for Methanol Electro‐Oxidation
Author(s) -
Zhang Lili,
Ding LiangXin,
Chen Hongbin,
Li Dongdong,
Wang Suqing,
Wang Haihui
Publication year - 2017
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201604000
Subject(s) - alloy , materials science , methanol , ternary operation , nanostructure , chemical engineering , nanotube , carbon nanotube , metal , transition metal , nanotechnology , inorganic chemistry , chemistry , catalysis , composite material , organic chemistry , metallurgy , computer science , engineering , programming language
Inhibiting CO formation can more directly address the problem of CO poisoning during methanol electro‐oxidation. In this study, 1D self‐supported porous PtAuP alloy nanotube arrays (ANTAs) are synthesized via a facile electro‐codeposition approach and present enhanced activity and improved resistance to CO poisoning through inhibiting CO formation (non‐CO pathway) during the methanol oxidation reaction in acidic medium. This well‐controlled Pt‐/transition metal‐/nonmetal ternary nanostructure exhibits a specific electroactivity twice as great as that of PtAu alloy nanotube arrays and Pt/C. At the same time, PtAuP ANTAs show a higher ratio of forward peak current density ( I f ) to backward peak current density ( I b ) (2.34) than PtAu ANTAs (1.27) and Pt/C (0.78). The prominent I f / I b value of PtAuP ANTAs indicates that most of the intermediate species are electro‐oxidized to carbon dioxide in the forward scan, which highlights the high electroactivity for methanol electro‐oxidation.