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Surface‐Modified Porous Carbon Nitride Composites as Highly Efficient Electrocatalyst for Zn‐Air Batteries
Author(s) -
Niu Wenhan,
Li Zhao,
Marcus Kyle,
Zhou Le,
Li Yilun,
Ye Ruquan,
Liang Kun,
Yang Yang
Publication year - 2018
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201701642
Subject(s) - materials science , electrocatalyst , bifunctional , graphitic carbon nitride , catalysis , graphene , nitride , carbon fibers , nanoparticle , chemical engineering , carbon nitride , porosity , oxygen evolution , composite number , conductivity , inorganic chemistry , nanotechnology , composite material , electrochemistry , electrode , chemistry , organic chemistry , photocatalysis , layer (electronics) , engineering
Porous carbon nitride (PCN) composites are fabricated using a top‐down strategy, followed by additions of graphene and CoS x nanoparticles. This subsequently enhances conductivity and catalytic activity of PCN (abbreviated as CoS x @PCN/rGO) and is achieved by one‐step sulfuration of PCN/graphene oxides (GO) composite materials. As a result, the as‐prepared CoS x @PCN/rGO catalysts display excellent activity and stability toward both oxygen evolution and reduction reactions, surpassing electrocatalytic performance shown by state‐of‐the‐art Pt, RuO 2 and other carbon nitrides. Remarkably, the CoS x @PCN/rGO bifunctional activity allows for applications in zinc‐air batteries, which show better rechargeability than Pt/C. The enhanced catalytic performance of CoS x @PCN/rGO can primarily be attributed to the highly porous morphology and sufficiently exposed active sites that are favorable for electrocatalytic reactions.