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In this work, designed growth of two type of N-doped graphene nanosheets has been investigated using NH4H2PO4 and (NH4)2HPO4 as buffering agents, respectively, in a mild hydrothermal process. X-ray photoelectron spectroscopy (XPS) characterization indicates that the graphene nanosheets grown using NH4H2PO4 (NGC) have lower nitrogen but higher oxygen content than those using (NH4)2HPO4 (NGL). Electrochemical...
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