Boron-doped platinum-nickel nanoalloy supported on carbon black (Pt3Ni-B/C) is facilely synthesized through an aqueous phase process under mild conditions with dimethylamine borane as the reducing agent. The Pt3Ni-B/C catalyst exhibits an activity toward oxygen reduction reaction (ORR) in acid media at 0.90 V vs. RHE with a mass activity 3 and 1.7 times, and a specific activity 6 and 1.4 times as high as those for a commercial Pt/C and a Pt3Ni/C synthesized using NaBH4 reductant, respectively. After 10,000 cycles of accelerated durability test the Pt3Ni-B/C demonstrates a significantly improved ORR durability in comparison to its counterparts with only 10 mV decay for its half-wave potential. The higher performance of the Pt3Ni-B/C with respect to that of the Pt3Ni/C can be ascribed to well-dispersed and relatively small nanoalloy particles, as well as slightly intensified adsorption strength toward Ocontaining species and structural resistance to potential cycling with boron doping. (C) 2017 Elsevier Ltd. All rights reserved.