Single-atom catalysts(SACs)attract widespread attention in heterogeneous catalysis due to their maximum atomic utilization efficiency and unique physical and chemical properties.However,their applications in chemical ...Single-atom catalysts(SACs)attract widespread attention in heterogeneous catalysis due to their maximum atomic utilization efficiency and unique physical and chemical properties.However,their applications in chemical sensing keep huge potential but remain unclear.Herein,a Ni-N_(4)-C SAC was synthesized for the trace detection of dopamine(DA)and uric acid(UA).The Ni-N_(4)-C SAC exhibited superior sensing performance compared to the Ni clusters.The detection range for DA and UA were 0.05–75μM and 5–90μM with detection limits of 0.027 and 0.82μM,respectively.Density functional theory(DFT)computations indicate that Ni-N_(4)-C has a lower reaction barrier during electrochemical process,indicating that the atomic Ni sites possess higher intrinsic activity than Ni clusters.Moreover,DA and UA show strong potential dependency on the Ni-N_(4)-C catalyst,indicating its applicability for their concurrent detection.This work extends the application of SACs in chemical sensing.展开更多
基金supported by the National Key R&D Program of China(Nos.2022YFA1505100 and 2022YFB4102000)the National Natural Science Foundation of China(Nos.52105145,12274124,and 22002088)+2 种基金the Shanghai Pilot Program for Basic Research(No.22TQ1400100-6)the Fundamental Research Funds for the Central Universitiessupported by Key Laboratory of Theoretical and Computational Photochemistry,Ministry of Education,College of Chemistry,Beijing Normal University。
文摘Single-atom catalysts(SACs)attract widespread attention in heterogeneous catalysis due to their maximum atomic utilization efficiency and unique physical and chemical properties.However,their applications in chemical sensing keep huge potential but remain unclear.Herein,a Ni-N_(4)-C SAC was synthesized for the trace detection of dopamine(DA)and uric acid(UA).The Ni-N_(4)-C SAC exhibited superior sensing performance compared to the Ni clusters.The detection range for DA and UA were 0.05–75μM and 5–90μM with detection limits of 0.027 and 0.82μM,respectively.Density functional theory(DFT)computations indicate that Ni-N_(4)-C has a lower reaction barrier during electrochemical process,indicating that the atomic Ni sites possess higher intrinsic activity than Ni clusters.Moreover,DA and UA show strong potential dependency on the Ni-N_(4)-C catalyst,indicating its applicability for their concurrent detection.This work extends the application of SACs in chemical sensing.
