Atomically dispersed Cu-based metal-organic framework directly for alkaline polymer electrolyte fuel cells  

作　　者：Wenbiao Zhang Bolong Yang Zhonghua Xiang 

机构地区：[1]State Key Laboratory of Organic-Inorganic Composites,Beijing University of Chemical Technology,Beijing 100029,China [2]Sungrow Hydrogen Sci.&Tech.Co.,Ltd.,Hefei 230088,China

出　　处：《Chinese Chemical Letters》2025年第2期551-557,共7页中国化学快报(英文版)

基　　金：supported by the National Key Research and Development Program of China(No.2022YFB3807500);the National Natural Science Foundation of China(No.22220102003);the Beijing Natural Science Foundation(No.JL23003);“Double-First-Class”construction projects(Nos.XK180301 and XK1804-02)。

摘　　要：Atomically dispersed Cu-based single-metal-site catalysts(Cu-N-C)have emerged as a frontier for electrocatalytic oxygen reduction reactions(ORR)because they can effectively optimize the D-band center of the Cu active site and provide appropriate adsorption/desorption energy for oxygen-containing intermediates.Metal-organic frameworks(MOFs)show excellent prospects in many fields because of their structural regularity and designability,but their direct use for electrocatalysis has been rarely reported due to the low intrinsic conductivity.Here,a MOF material(Cu-TCNQ)with highly regular single-atom copper active centers was successfully prepared using a solution chemical reaction method.Subsequently,Cu-TCNQ and graphene oxide(GO)were directly self-assembled to form a Cu-TCNQ/GO composite,which improved the conductivity of the catalyst while maintained the atomically precise controllability.The resistivity of the Cu-TCNQ/GO decreased by three orders of magnitude(1663.6-2.7 W/cm)compared with pure Cu-TCNQ.The half-wave potential was as high as 0.92 V in 0.1 mol/L KOH,even better than that of commercial 20%Pt/C.In alkaline polymer electrolyte fuel cells(APEFCs),the open-circuit voltage and power density of Cu-TCNQ/GO electrode reached 0.95 V and 320 m W/cm^(2),respectively,which suggests that Cu-TCNQ/GO has a good potential for application as a cathode ORR catalyst.

关 键 词：Metal-organic frameworks Single-metal-site catalysts Cu-TCNQ GO Oxygen reduction reaction Alkaline polymer electrolyte fuel cells 

分 类 号：TM911.4[电气工程—电力电子与电力传动] O643.36[理学—物理化学]