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AuthorQingqing, Lu
AuthorLi, Jiaojiao
AuthorEid, Kamel
AuthorGu, Xilei
AuthorWan, Zhenyu
AuthorLi, Wenpeng
AuthorAl-Hajri, Rashid S.
AuthorAbdullah, Aboubakr M.
Available date2022-09-19T08:47:05Z
Publication Date2022-07-01
Publication NameJournal of Electroanalytical Chemistry
Identifierhttp://dx.doi.org/10.1016/j.jelechem.2022.116361
CitationLu, Q., Li, J., Eid, K., Gu, X., Wan, Z., Li, W., ... & Abdullah, A. M. (2022). Facile one-step aqueous-phase synthesis of porous PtBi nanosponges for efficient electrochemical methanol oxidation with a high CO tolerance. Journal of Electroanalytical Chemistry, 916, 116361.‏
ISSN15726657
URIhttps://www.sciencedirect.com/science/article/pii/S1572665722003538
URIhttp://hdl.handle.net/10576/34163
AbstractDeliberate control in the composition and morphology of Pt-based catalysts is an efficient route for enhancing the methanol oxidation reaction (MOR). Herein we developed a facile method for rational one-step aqueous-phase synthesis of PtBi nanosponges with tunable composition, based on the prompt reduction of an aqueous solution of Pt and Bi precursors using NaBH4. Mechanistically, the high-reduction power of NaBH4 formed multiple small colloidal PtBi nanocrystals (NCs), which coalesce together to reduce their interfacial energy resulting in oriented attachment growth. The fabrication process is simple, quick (2 min), productive, and free of surfactants or organic solvents. PtBi nanosponges showed 3D network-like architectures with a rough surface and interconnected pores (mesopore and macropore). The MOR mass (specific) activity of Pt67Bi33, 1.8 A/mgPt (15.4 mA cm−2), outperformed Pt78Bi22, Pt, and Pt/C, by 2.3 (1.2), 4.8 (3.6), and 5.1 (24.7) times, respectively besides greater stability and CO tolerance. This method could be extended to synthesize other binary Pt-based catalysts for various electrocatalytic applications.
Languageen
PublisherElsevier B.V.
SubjectBinary PtBi
Porous PtBi nanosponge
Methanol oxidation
CO tolerance
TitleFacile one-step aqueous-phase synthesis of porous PtBi nanosponges for efficient electrochemical methanol oxidation with a high CO tolerance
TypeArticle
Volume Number916


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