Facile fabrication of PtPd alloyed worm-like nanoparticles for electrocatalytic reduction of oxygen

作者：Zhang, Yali; Zhao, Lingzhi^*; Walton, Jonathan; Liu, Zhen; Tang, Zhenghua^*

来源：International Journal of Hydrogen Energy, 2017, 42(27): 17112-17121.

DOI：10.1016/j.ijhydene.2017.05.167

• PtPd alloys
• Worm-like nanoparticles
• Oxygen electroreduction
• Enhanced activity
• Remarkable stability

Alloying platinum with a second metal such as palladium can increase the mass activity of Pt and lower the usage of expensive Pt elements, hence is of great importance for designing highly efficient and cost-effective electrocatalysts for oxygen reduction reaction (ORR). In this study, monomorphic PtPd alloyed worm-like nanoparticles (PtPd WNPs) with dominant (111) facets were prepared with a facile one-pot approach. The detailed morphology, composition, and surface structure of the PtPd WNPs were investigated by transmission electron microscopy (TEM), scanning electron microscopy (SEM), selected-area electron diffraction (SAED), energy dispersive spectrum (EDS), X-ray diffraction (XRD), as well as Xray photoelectron spectroscopy (XPS). The prepared PtPd WNPs displayed enhanced electrocatalytic activity and remarkably robust stability toward ORR in both alkaline and acidic media, superior than commercial Pt/C catalysts. This strategy may open a new route to design and prepare advanced electrocatalysts for fuel cells.

• 出版日期2017-7-6
• 单位华南理工大学; 华南师范大学