Pt1/Ni6Co1 layered double hydroxides/N-doped graphene for electrochemical non-enzymatic glucose sensing by synergistic enhancement of single atoms and doping

作者：Baojun Long, Peiyu Cao, Yuanmeng Zhao, Qianqian Fu, Yan Mo, Yueming Zhai, Juejing Liu, Xingyi Lyu, Tao Li, Xiaofeng Guo, Changsheng Shan, Ming‐Hua Zeng · 发表于：Nano Research · 年份：2022 · DOI：10.1007/s12274-022-4801-9 · 被引用次数：38 · 研究领域：Electrochemical sensors and biosensors、Conducting polymers and applications、Supercapacitor Materials and Fabrication

The development of novel single-atom catalysts is important for highly efficient electrochemical catalysis and sensing. In this work, a novel Pt single atoms (SAs) supported on Ni 6 Co 1 layered double hydroxides/nitrogen-doped graphene (Pt 1 /Ni 6 Co 1 LDHs/NG) was constructed for electrochemical enzyme-free catalysis and sensing towards glucose. The loading of Pt single atoms increases with doping of Co atoms that generate more anchoring sites for Pt SAs. The resulting Pt 1 /Ni 6 Co 1 LDHs/NG exhibits low oxidative potential of 0.440 V with high sensitivity of 273.78 µA·mM −1 ·cm −2 toward glucose, which are 85 mV lower and 15 times higher than those of Ni(OH) 2 , respectively. Pt 1 /Ni 6 Co 1 LDHs/NG also shows excellent selectivity and great stability during 5-week testing. Theoretical and experimental results show that the boosted performance of Pt 1 /Ni 6 Co 1 LDHs/NG originates from its stronger binding energy with glucose and the synergistic effect of Pt SAs, Co doping, and NG. This work provides a general strategy of designing highly active SACs for extending their application in electrochemical sensing.