Single-atom Ni-N_(4) for enhanced electrochemical sensing  

作　　者：Zhuhui Qin Bo Tang Guiru Zhang Chongqing Zhu Kun Jiang Bowei Zhang Fu-Zhen Xuan 

机构地区：[1]Shanghai Key Laboratory of Intelligent Sensing and Detection Technology,East China University of Science and Technology,Shanghai 200237,China [2]Key Laboratory of Pressure Systems and Safety of Ministry of Education,East China University of Science and Technology,Shanghai 200237,China [3]School of Mechanical and Power Engineering,East China University of Science and Technology,Shanghai 200237,China [4]Key Laboratory of Theoretical and Computational Photochemistry,Ministry of Education,College of Chemistry,Beijing Normal University,Beijing 100875,China [5]Interdisciplinary Research Center,School of Mechanical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China

出　　处：《Nano Research》2024年第8期7658-7664,共7页纳米研究（英文版）

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);the Shanghai Pilot Program for Basic Research(No.22TQ1400100-6);the Fundamental Research Funds for the Central Universities;supported by Key Laboratory of Theoretical and Computational Photochemistry,Ministry of Education,College of Chemistry,Beijing Normal University。

摘　　要：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.

关 键 词：single-atom catalysts chemical sensing DOPAMINE uric acid 

分 类 号：O64[理学—物理化学]