Facile one-step aqueous-phase synthesis of porous PtBi nanosponges for efficient electrochemical methanol oxidation with a high CO tolerance

Qingqing Lu, Jiaojiao Li, Kamel Eid*, Xilei Gu, Zhenyu Wan, Wenpeng Li, Rashid S. Al-Hajri, Aboubakr M. Abdullah

*المؤلف المقابل لهذا العمل

نتاج البحث: المساهمة في مجلةمراجعة النظراء

5 اقتباسات (Scopus)

ملخص

Deliberate 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.

اللغة الأصليةEnglish
رقم المقال116361
دوريةJournal of Electroanalytical Chemistry
مستوى الصوت916
المعرِّفات الرقمية للأشياء
حالة النشرPublished - يوليو 1 2022

ASJC Scopus subject areas

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