摘要
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 273.78μA·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.
基金
C.S.S.thanks the support from the National Natural Science Foundation of China(No.21874031)
“Chu-Tian Scholar”Program of Hubei Province.M.H.Z.acknowledges the support from the NSFC of China(No.22171075)
Guangxi Province(No.2017GXNSFDA198040)
the BAGUI talent program(No.2019AC26001)
J.J.L.and X.F.G.acknowledge the support by the institutional funds and New Faculty Seed Grant from ORAP at WSU
This research used resources of the Advanced Photon Source,an Office of Science User Facility operated for the U.S.Department of Energy(DOE)Office of Science by Argonne National Laboratory under Contract(No.DE-AC02-06CH11357)
Y.M.Z.thanks the support from the China Postdoctoral Science Foundation(No.2021M701133).
