Ultra-thin PtFe-nanowires as durable electrocatalysts for fuel cells

作者：Zhang Zhiyong^*; Li Meijun; Wu Zili; Li Wenzhen

来源：Nanotechnology, 2011, 22(1): 015602.

DOI：10.1088/0957-4484/22/1/015602

Ultra-thin PtxFey-nanowires (PtxFey-NWs) with a diameter of 2-3 nm were successfully prepared through a solution-phase reduction method at Pt-Fe compositions from 1: 1 to 2:1. The carbon supported PtxFey-NWs (PtxFey-NWs/C) demonstrated higher oxygen reduction reaction (ORR) activity and better electrochemical durability than conventional Pt/C catalyst. After 1000 cycles of 0-1.3 V (versus RHE), the relative electrochemical surface area (ECSA) of Pt(2)Fe(1)-NW/C dropped down to 46%, which was two times better than Pt/C catalyst, and the mass activity at 0.85 V (versus RHE) for Pt(1)Fe(1)-NW/C was 39.9 mAmg(-1)-(Pt), which is twice that for Pt/C (18.6 mA mg(-1)-(Pt)).

• 出版日期2011-1-7