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|Title:||Self-supported PtAuP alloy nanotube arrays with enhanced activity and stability for methanol electro-oxidation|
|Citation:||Small, 2017; 13(17):1-8|
|Lili Zhang, Liang-Xin Ding, Hongbin Chen, Dongdong Li, Suqing Wang and Haihui Wang|
|Abstract:||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 (If) to backward peak current density (Ib) (2.34) than PtAu ANTAs (1.27) and Pt/C (0.78). The prominent If/Ib 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.|
|Keywords:||Electrocatalysts; methanol oxidation reaction; nanotube arrays; non‐CO pathway; PtAuP alloy|
|Rights:||© 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim|
|Appears in Collections:||Chemical Engineering publications|
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