?Electro-dissolution? of gold nanoclusters for constructing ammonia sensor

作者全名："Shu, Danting; Dai, Wei; Zang, Guangchao; Che, Wei; Peng, Qianyu; Yuwen, Tianyi; Wang, Shijun; Wu, Zhipeng; Fan, Jingchuan; Huang, Chenghong; Zhang, Yuchan"

作者地址："[Huang, Chenghong; Zhang, Yuchan] Chongqing Med Univ, Lab Teaching & Management Ctr, Inst Life Sci, Chongqing 400016, Peoples R China; Chongqing Med Univ, Lab Teaching & Management Ctr, Lab Tissue & Cell Biol, Chongqing 400016, Peoples R China; Chongqing Univ Sci & Technol CQUST, Chongqing 401331, Peoples R China"

通信作者："Huang, CH; Zhang, YC (通讯作者)，Chongqing Med Univ, Lab Teaching & Management Ctr, Inst Life Sci, Chongqing 400016, Peoples R China."

来源：JOURNAL OF ELECTROANALYTICAL CHEMISTRY

ESI学科分类：CHEMISTRY

WOS号：WOS:000802778300007

JCR分区：Q1

影响因子：4.5

年份：2022

卷号：916

期号：　

开始页：　

结束页：　

文献类型：Article

关键词：Electric dissolution; Ammonia sensor; Growth of Au nanoclusters; Carbon cloth; Tafel; Electrodeposition

摘要："Overcoming the electrocatalytic energy barrier mediated by Gerischer-Mauerer's mechanism has always been a major challenge in ammonia detection. The previous report [1] that ammonia can electro-dissolve Au gives us inspiration to establish a more efficient and reusable electrochemical transmission technique for ammonia detection and, above all, remove the ammonia electrocatalytic barrier. In this work, the latent electro-dissolution activity of ammonia towards Au was employed to construct the sensing interface. The sensor applied the potentiostatic electrodeposition method to grow Au crystals on the surface of carbon cloth, offering a simple and low-cost alternative for practical production.Additionally, the electro-dissolution sensing method effectively addresses the limitation of high energy barrier and toxic products (N-ads) in catalytic oxidation of ammonia. Cyclic Voltammetry and Tafel curve demonstrate the electrochemical properties of Au/CC and help to predict the relationship between the ammonia concentration and current through theoretical analysis, which were further confirmed by an i-t curve. We proved that the sensor has excellent reproducibility under high-intensity work in theory and it exhibits high stability over 7 weeks in practice. The economical and facile constructing electrode method and the outstanding performance in long-term reuse greatly reduce the cost. Generally, the sensor is suitable for continuous ammonia monitoring in wastewater and quantitative analysis of products by chemical companies."

基金机构："Natural Science Foundation of Chongqing [cstc2020jcyj-msxmX0330]; Project of Science and Technology of Chongqing Yuzhong District [20170119, 20170113]; Project of Tutorial System of Medical Undergraduate in Lab Teaching & Management Center in Chongqing Medical Univer-sity [LTMCMTS202003]; Project of Scientific Research and Innovative Experiment for College Student in Chongqing Medical University [CXSY201805, CXSY201830, SRIEP201947]"

基金资助正文："This work is supported by the grants from the Natural Science Foundation of Chongqing (cstc2020jcyj-msxmX0330) , the Project of Science and Technology of Chongqing Yuzhong District (20170119, 20170113) , the Project of Tutorial System of Medical Undergraduate in Lab Teaching & Management Center in Chongqing Medical Univer-sity (LTMCMTS202003) and the Project of Scientific Research and Innovative Experiment for College Student in Chongqing Medical University (CXSY201805, CXSY201830, SRIEP201947) ."