PtNi alloy nanoparticles grown<i>in situ</i>on nitrogen doped carbon for the efficient oxygen reduction reaction
Weiqi Ye, Zhenyu Wu, Shengqi Zhang, Yi Sun, Xiaoyan Zhang, Wei Zhou, Weimin Cao, Tao Wang, Danhong Cheng, Haijiao Xie
Abstract
a simple one-step solvothermal method using easily accessible reagents. The synthesized PtNi/NC exhibits enhanced mass activity (MA), specific activity (SA), and positive onset potential compared with commercial Pt/C catalysts. Meanwhile, the half-wave potential shifted negatively to only 18 mV after 5000 cycles for PtNi/NC, indicating excellent stability. The enhanced ORR performance can be ascribed to the introduction of Ni into Pt optimizing the adsorption energy of Pt towards oxygen by adjusting the d band center of the Pt atom and stronger interaction between the metal NPs and support. Our work provides a potential synthesis strategy for developing a Pt-based catalyst with a low Pt loading and high ORR performance.