纳米笼
层状双氢氧化物
电催化剂
材料科学
电子转移
化学工程
氢氧化物
催化作用
超级电容器
电化学
过渡金属
纳米技术
化学
电极
无机化学
光化学
物理化学
工程类
生物化学
作者
Tong Yang,Wenna Zhang,Jiashun Wu,Sheng Liu,Yan Zhao
标识
DOI:10.1016/j.apsusc.2022.154205
摘要
The demands to overcome the intrinsic agglomeration of 2D layered double hydroxides (LDHs) and accelerate electron transfer kinetics in electrocatalysis highlight the desirability in rationally designing hollow transition metal sulfides (TMSs) as feasible supports for 2D structures. Herein, the well-designed CuS nanocages covered by NiCo LDHs nanosheets with the optimal Ni/Co ratio of 1:2 (CuS [email protected]1Co2 LDHs) were successfully prepared for the first time through sulfidation coupled with a coordinated etching and precipitation (CEP) method. As a nano-electrocatalyst for glucose detection, CuS [email protected]1Co2 LDHs not only demonstrated the advantage of the unique structure with outstanding mass diffusion, but also promoted electrocatalytic activities accompanied with fast electron transfer. Furthermore, density functional theory (DFT) calculations disclosed that the coupling between CuS NCs and Ni1Co2 LDHs enabled the increased glucose absorption energy and the improved conductivity. Significantly, the CuS [email protected]1Co2 LDHs modified electrode exhibited superior electrocatalytic performance with the sensitivity as high as 2236.4 μM mM−1 cm−2 combined with an ultralow limit detection of 0.18 μM, wide linear range (0.001–4.6 mM), and fast current response (1 s). Overall, the proposed electrochemical sensors shed light on the favorable incorporation of 3D hollow TMSs and 2D LDHs for high-performance glucose monitoring.
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