writer：Xin Gu, Ying Wang, Liting Yan, Liangjun Li, Pengcheng Dai*, Hongbo Wang*, Xuebo Zhao*
keywords：Oxygen reduction reaction; Nanocomposites; Metal-organic frameworks; Electrocatalysis.
source：期刊
specific source：Int. J. Electrochem. Sci., 11 (2016) 9575 – 9584
Issue time：2016年
The electrocatalytic performances for the oxygen reduction reaction (ORR) highly depend on the structure and composition of catalysts. In this work, a novel non-precious metal catalyst (CoS2-Co/N-doped porous carbon) has been fabricated by the carbonization of metal-organic frameworks (MOFs) with a consequent sulfuration process. The resultant nanocomposite exhibits highly desirable structure features for ORR, such as high-efficient Co-N-C active sites, porous carbon nanostructures for rapid mass transfer, and CoS2 protective layers that prevent Co-N-C active sites from deactivation. As a result, the rationally designed catalyst shows extremely high electrocatalytic stability with a high current retention of ~ 98 % after 10 h in alkaline media.