title: High Durable Ternary Nanodendrites as Effective Catalysts for Oxygen Reduction Reaction.
abstract: Exploiting high catalytic activities and superior durability is significant for the lifetime and the cost of electro-catalysts for oxygen reduction reaction (ORR). Pt-Ni nanocrystals have attracted considerable attention owing to their exceptionally catalytic performance. However, the durability of Pt-Ni nanoparticles in acid media is still far below satisfaction. Consequently, improving the durability is extremely urgent for the application of Pt-Ni catalysts. To this end, we herein develop Pt-Ni-Ir ternary nanocrystals with dendritic shape, which are synthesized through a facile one-pot strategy. Such nanostructures featured with multibranches show an area specific activity of 1.58 mA cm(-2), seven times more than that of the commercial Pt/C catalyst (0.21 mA cm(-2)). More importantly, the dendritic Pt-Ni-Ir catalyst displays extraordinarily high durability. In contrast to the commercial Pt/C counterparts, which exhibit losses of 53.2% in EASA and 41% in area specific activity after 12 000 cycles of sweeping in the potential range of 0.6-1.1 V, only respective losses of 5.5% and 6% are detected for our dendritic Pt-Ni-Ir catalyst. The high activity and remarkable durability are mainly attributed to the dendritic morphology and the introduction of Ir. This work demonstrates that the Pt-Ni-Ir dendritic nanostructures are promising electro-catalysts for ORR.
authors: School of Chemical Engineering, Huaihai Institute of Technology , Lianyungang 222005, People's Republic of China.
authors: Tao
authors: T
authors: Yang
authors: School of Chemical Engineering, Huaihai Institute of Technology , Lianyungang 222005, People's Republic of China.
authors: Yanxia
authors: Y
authors: Ma
authors: Testing Center, Yangzhou University , Yangzhou 225009, People's Republic of China.
authors: Qingli
authors: Q
authors: Huang
authors: School of Materials Science and Engineering, Shandong University of Science and Technology , Qingdao 266590, People's Republic of China.
authors: Maoshuai
authors: M
authors: He
authors: School of Materials Science and Engineering, Harbin University of Science and Technology , Harbin 150040, People's Republic of China.
authors: Guojian
authors: G
authors: Cao
authors: School of Chemical Engineering, Huaihai Institute of Technology , Lianyungang 222005, People's Republic of China.
authors: Xia
authors: X
authors: Sun
authors: School of Chemical Engineering, Huaihai Institute of Technology , Lianyungang 222005, People's Republic of China.
authors: Dongen
authors: D
authors: Zhang
authors: School of Chemical Engineering, Huaihai Institute of Technology , Lianyungang 222005, People's Republic of China.
authors: Mingyan
authors: M
authors: Wang
authors: School of Chemical Engineering, Huaihai Institute of Technology , Lianyungang 222005, People's Republic of China.
authors: Hong
authors: H
authors: Zhao
authors: School of Chemical Engineering, Huaihai Institute of Technology , Lianyungang 222005, People's Republic of China.
authors: Zhiwei
authors: Z
authors: Tong
keywords: dendrite; durability; electro-catalyst; oxygen reduction reaction; platinum−nickel−iridium