Economical N/P co-doped graphite nanosheets for electrocatalytic bifunctional HER and OEROA
Graphite,as an important carbon material,is widely used in several fields owing to its excellent thermal/electrical conductivity,robust chemical stability,abundant availability,and low cost.A lot of research works have demonstrated that graphite can be doped with heteroatoms to enhance the electrocatalytic activity of hydrogen evolution reactions(HER)and the oxygen evolution reaction(OER).In our work,N/P co-doped graphite nanosheets(NP-GP)were prepared by a high-temperature vapor-phase method using graphite powder,melamine,and NaH2PO2 as raw materials.NP-GP exhibits bifunctional electrocatalytic OER and HER activities with an overpotential of 314 mV at 10 mA/cm^(2) in 1 M KOH and an overpotential of 69.4 mV at-10 mA cm^(-2) in 0.5 M H_(2)SO_(4) after two-step cyclic voltammetric(CV)activation.And at the same time it keeps good electrocatalytic stability.The impact mechanism of two-step CV activation on the active sites of electrocatalysts was deeply studied.This work provided a new idea for the subsequent design of heteroatom-doped carbon materials as highly efficient and economical multifunctional electrocatalysts.
Weiye He;Zhao-Di Yang;Yang Liu;Yu Zhang;Guiling Zhang
School of Materials Science and Chemical Engineering,Harbin University of Science and Technology,Harbin,150080,ChinaSchool of Materials Science and Chemical Engineering,Harbin University of Science and Technology,Harbin,150080,ChinaSchool of Materials Science and Chemical Engineering,Harbin University of Science and Technology,Harbin,150080,China Institute of Process Engineering,Chinese Academy of Sciences,Beijing,1ooo8o,ChinaInstitute of Process Engineering,Chinese Academy of Sciences,Beijing,1ooo8o,ChinaSchool of Materials Science and Chemical Engineering,Harbin University of Science and Technology,Harbin,150080,China
化学化工
hydrogen evolution reactioncarbon materialisgraphite nanosheets np gphydrogen evolution reactions herdoped heteroatomsgraphite pbifunctionaloxygen evolution reaction oer
《Green Chemical Engineering》 2026 (3)
P.353-361,9
financially supported by the National Natural Science Foundation of China(Grant No.52273288)National Key R&D Program of China(Grant No.2022YFC3901800)Heilongjiang Provincial Natural Science Foundation of China(Grant No.LH2024B016)。
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