Immobilization of Fe-Doped Ni2P Particles Within Biomass Agarose-Derived Porous N,P-Carbon Nanosheets for Efficient Bifunctional Oxygen Electrocatalysis
Xiao, YF (Xiao, Yifan)[ 1 ] ; Deng, SH (Deng, Sihui)[ 1 ] ; Li, M (Li, Meng)[ 1 ] ; Zhou, QX (Zhou, Qixing)[ 1 ] ; Xu, LB (Xu, Libang)[ 2 ] ; Zhang, HF (Zhang, Huaifang)[ 1 ] ; Sun, DM (Sun, Dongmei)[ 1 ]*（孙冬梅）; Tang, YW (Tang, Yawen)[ 1 ]*（唐亚文）

[ 1 ] Nanjing Normal Univ, Sch Chem & Mat Sci, Jiangsu Collaborat Innovat Ctr Biomed Funct Mat, Jiangsu Key Lab New Power Batteries, Nanjing, Jiangsu, Peoples R China
[ 2 ] Nanjing Tech Univ, Coll Overseas Educ, Nanjing, Jiangsu, Peoples R China

FRONTIERS IN CHEMISTRY，201908,7,523

A feasible and green sol-gel method is proposed to fabricate well-distributed nano-particulate Fe-Ni2P incorporated in N, P-codoped porous carbon nanosheets (Fe-Ni2P@N,P-CNSs) using biomass agarose as a carbon source, and ethylenediamine tetra (methylenephosphonic acid) (EDTMPA) as both the N and P source. The doped Fe in Ni2P is essential for a substantial increase in intrinsic catalytic activity, while the combined N,P-containing porous carbon matrix with a better degree of graphitization endows the prepared Fe-Ni2P@N,P-CNSs catalyst with a high specific surface area and improved electrical conductivity. Benefiting from the specific chemical composition and designed active site structure, the as-synthesized Fe-Ni2P@N,P-CNSs manifests a satisfying catalytic performance toward both oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) in an alkaline solution, with low overpotential, small Tafel slope and long-term durability, relative to the counterparts (Fe-free Ni12P5/Ni2P2O7@N,P-CNSs and CNSs) with single components and even comparable to Pt/C and RuO2 catalysts. The present work broadens the exploration of efficient bifunctional oxygen electrocatalysts using earth abundant biomass as carbon sources based on non-noble metals for low cost renewable energy conversion/storage.

文章链接：
https://www.frontiersin.org/articles/10.3389/fchem.2019.00523/full

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