title: Self-Supported PtAuP Alloy Nanotube Arrays with Enhanced Activity and Stability for Methanol Electro-Oxidation.
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/Ibvalue 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.
authors.affiliation: School of Chemistry and Chemical Engineering, South China University of Technology, No. 381 Wushan Road, Guangzhou, 510640, China.
authors.forename: Lili
authors.initials: L
authors.lastname: Zhang
authors.affiliation: School of Chemistry and Chemical Engineering, South China University of Technology, No. 381 Wushan Road, Guangzhou, 510640, China.
authors.forename: Liang-Xin
authors.initials: LX
authors.lastname: Ding
authors.affiliation: School of Chemistry and Chemical Engineering, South China University of Technology, No. 381 Wushan Road, Guangzhou, 510640, China.
authors.forename: Hongbin
authors.initials: H
authors.lastname: Chen
authors.affiliation: School of Chemistry and Chemical Engineering, South China University of Technology, No. 381 Wushan Road, Guangzhou, 510640, China.
authors.forename: Dongdong
authors.initials: D
authors.lastname: Li
authors.affiliation: School of Chemistry and Chemical Engineering, South China University of Technology, No. 381 Wushan Road, Guangzhou, 510640, China.
authors.forename: Suqing
authors.initials: S
authors.lastname: Wang
authors.affiliation: School of Chemistry and Chemical Engineering, South China University of Technology, No. 381 Wushan Road, Guangzhou, 510640, China.
authors.forename: Haihui
authors.initials: H
authors.lastname: Wang
keywords: PtAuP alloy; electrocatalysts; methanol oxidation reaction; nanotube arrays; non-CO pathway