▎ 摘　　要

Co-3(PO4)(2) is recently reported to be an attractile electrocatalyst in biomonitoring oxygen/hydrogen evolution due to its biocompatibility and high stability. In this work, a weakly networked cobaltous phosphate (netCo3( PO4)(2))decorated with defective nitrogen-doped reduced graphene oxide (net-Co-3(PO4)(2)/NG)was facilely prepared through ultrasonic exfoliation. A glassy carbon electrode (GCE)modified with the net-Co-3(PO4)(2)/NG (net-Co-3(PO4)(2)/NG)was fabricated as a non-enzymatic glucose sensor. The net-Co-3(PO4)(2)/NG/GCE exhibited a ultra-high sensitivity of 2307 mu AmM-1 cm(-2), a low detection limit of 1.0 mu M (at a signal-to-noise ratio of 3, S/N = 3). The excellent electrochemical performances of net-Co-3(PO4)(2)/NG/GCE for glucose oxidation were attributed to the superior catalytic activity of net-Co-3(PO4)(2) with a weakly bonding structure because of solvent exfoliation, and the high conductivity of defective NG sheets. Moreover, the net-Co-3(PO4)(2)/NG/GCE was successfully used to detect glucose in human serum, and the good recoveries made net-Co-3(PO4)(2)/NG a very promising sensing material in clinical lab.