Scalable preparation of PtPd/carbon nanowires in the form of membrane as highly stable electrocatalysts for oxygen reduction reaction. (28th January 2019)

• Record Type: Journal Article
• Authors: Deng, Xiaoting; Yin, Shaofeng; Wu, Xiaobo; Sun, Min; Li, Zhenqin; Xie, Zhiyong; Liang, Yili; Huang, Qizhong
• Is Part Of: International journal of hydrogen energy. Volume 44:Number 5(2019)
• Page Start: 2752
• Page End: 2759
• Publication Date: 2019-01-28
• Subjects: Oxygen reduction reaction -- PtPd/carbon nanowires -- Membrane; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2018.12.003
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: A novel platinum-palladium/carbon nanowires (PtPd/CNWs) catalysts are successfully prepared by electrospinning for the oxygen reduction reaction (ORR). The prepared PtPd/CNWs catalysts exist in the form of membrane, which can be directly applied as catalyst layer in membrane electrode assembly. The ORR activity of binary PtPd/CNWs catalysts are enhanced significantly in comparison to the ternary platinum-palladium-gold/carbon nanowires (PtPdAu/CNWs) catalysts and 20% Pt/C. Here, the gold in PtPdAu/CNWs mainly exists in larger gold nanoparticles rather than in the form of ternary alloy with Pt, Pd. The mass activity and special activity of PtPd/CNWs are 4.230 times and 4.225 times than that of 20% Pt/C, respectively. Moreover, the electrochemical active surface areas (ECSAs) of PtPd/CNWs catalysts almost keep constant after 5000 potential cycling, whereas 20% Pt/C drops almost 40% after 5000 potential cycling. Graphical abstract: Highlights: Synthesizing PtPd/CNWs catalysts by electrospinning is facile and scalable. The PtPd/CNWs exist in the form of membrane, which can be directly applied as catalyst layer. The C around PtPd NPs can prevent agglomeration and sintering of nanoparticles without affecting the active sites. PtPd/CNWs catalysts have outstanding activity and stability than standard Pt/C catalysts. The activity for ORR of binary catalysts is higher than that of ternary catalysts.