期刊
Journal of Materials Chemistry A

标题
Efficient oxygen reduction reaction using mesoporous Ni-doped Co3O4 nanowire array electrocatalysts

作者
Xili Tong, Xinhui Xia, Congxiu Guo, Yongqi Zhang, Jiangping Tu, Hong Jin Fan and Xiang-Yun Guo

摘要
Herein, mesoporous Ni-doped Co3O4 nanowire (NW) arrays are reported as a highly efficient and low-cost catalyst for oxygen reduction reaction (ORR) in alkaline electrolyte. The Ni doping affords more electroactive sites and enhanced conductivity, and the mesoporous structure provides increased surface exposure, which may improve ion/electron transport and reduce charge transfer resistance. The NW arrays exhibit a high ORR activity with a four-electron transfer reaction in alkaline media, a half-wave potential of 0.86 V vs. RHE and a superior stability when compared to the commercial Pt (20 wt%)/C catalyst. Our results suggest that the mesoporous Ni-doped Co3O4 NW arrays could be a promising ORR catalyst for fuel cells and metal–air batteries.

原文链接
http://pubs.rsc.org/en/content/articlelanding/2015/ta/c5ta04593b