AI Article Synopsis
- The study focuses on a new approach to prevent carbon monoxide (CO) poisoning during methanol electro-oxidation by using specially designed alloy nanotube arrays made from platinum, gold, and phosphorus (PtAuP).
- These nanotube arrays show significantly improved electroactivity, with twice the effectiveness compared to traditional Pt/C catalysts and enhanced resistance to CO formation.
- The findings highlight that the PtAuP ANTAs efficiently convert intermediate species to carbon dioxide during the oxidation process, demonstrating a higher forward-to-backward current density ratio, which indicates better performance in methanol electro-oxidation.
Article 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 (I ) to backward peak current density (I ) (2.34) than PtAu ANTAs (1.27) and Pt/C (0.78). The prominent I /I 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.
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| http://dx.doi.org/10.1002/smll.201604000 | DOI Listing |
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