▎ 摘　　要

In this paper, three-dimensional holey graphene (3D-HG) was used to fabricate a sensitive electrochemical sensing platform. Three-dimensional holey graphene with a 3D porous network and in-plane nanopores possesses a large surface area and more exposed edge planes, contributing to a remarkable increase of electrochemically active sites and of electron-transfer rate. As a result, the excellent electrocatalytic activities of 3D-HG modified electrode toward ascorbic acid (AA), uric acid (UA), and nitrite oxidation were observed. This sensor showed excellent properties for AA, UA and nitrite detection using differential pulse voltammograms, including low detection limits, wide linear ranges and high sensitivities. Moreover, the applicability of 3D-HG modified electrode was tested in real samples with the good accuracy and satisfying recovery. (C) 2019 The Electrochemical Society.