TY - JOUR
AU1 - Han, Xiao
AU2 - Zheng, Zhiping
AU3 - Chen, Jiayu
AU4 - Xue, Yakun
AU5 - Li, Huiqi
AU6 - Zheng, Jun
AU7 - Xie, Zhaoxiong
AU8 - Kuang, Qin
AU9 - Zheng, Lansun
AB - In the past decade, tremendous efforts have been devoted to the search for the alternatives to Pt-based catalysts for the oxygen reduction reaction (ORR) in fuel cells and metal–air batteries. Recently, metal–nitrogen–carbon (M–N–C) systems, especially 3d transition metals (TM) and their alloys encapsulated in nitrogen-doped carbon based materials (TM@N–C), have attracted increasing attention due to their low cost and high ORR activity. Here, a simple and novel strategy is developed to synthesize sandwich-structured TM@N–C composites, in which ultrafine Fe nanoparticles are encapsulated in nitrogen-doped carbon nanotubes (N-CNTs) grafted on both sides of reduced graphene oxide (rGO) sheets by pyrolysis of ammonium ferric citrate-functionalized zeolitic imidazolate framework-8@graphene oxide (Fe@ZIF-8@GO). The resulting Fe@N-CNTs@rGO composites naturally integrate zero-dimensional (0D) Fe nanoparticles, one-dimensional (1D) N-CNTs, and two-dimensional (2D) graphene into a three-dimensional (3D) hierarchical architecture with highly dispersed active sites, a large surface area, and abundant porosity. Because of these structural advantages, the sandwich-structured Fe@N-CNTs@rGO composites display a half-wave potential of 0.83 V in a 0.1 M KOH solution for the ORR, comparable to that of commercial Pt/C catalysts, and more excellent durability and resistance to fuel molecules. The proposed strategy paves a new way for the synthesis of non-precious high-performance electrocatalysts for energy conversion applications.
TI - Efficient oxygen reduction on sandwich-like metal@N–C composites with ultrafine Fe nanoparticles embedded in N-doped carbon nanotubes grafted on graphene sheets
JF - Nanoscale
DO - 10.1039/c9nr02914a
DA - 2019-07-04
UR - https://www.deepdyve.com/lp/royal-society-of-chemistry/efficient-oxygen-reduction-on-sandwich-like-metal-n-c-composites-with-wRWEAPCczi
SP - 12610
EP - 12618
VL - 11
IS - 26
DP - DeepDyve
ER -