Hemp derived N-doped highly porous carbon containing Co nanoparticles as electrocatalyst for oxygen reduction
Chao Zhang1, Jinhe Shu1, Shuxian Shi1
1State Key Laboratory of Chemical Resource Engineering, Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing 100029, PR China.
Abstract:
Biomass derived porous carbon was wildly used in non-precious metal carbon based electrocatalysts for ORR due to its low cost and sustainability. Here, we develop a facile route to prepare Co/N doped hemp derived highly porous carbon (Co/NHPC) as ORR electrocatalyst. The prepared Co/NHPC-90 possess 3D hierarchically porous nanostructure with high specific surface areas (1251 m2 g-1) and large pore volumes (0.99 cm3 g-1) due to the chemical activation of NaHCO3, which is benefit for the mass/electron transfer and exposure of active sites. In addition, melamine and cobalt nitrate were selected as nitrogen and metal source respectively to enrich the density of active sites. Thus, Co/NHPC-90 exhibits excellent ORR electrocatalytic performance with high half-wave potential (0.826 V), superior catalytic stability and tolerance to methanol.
