Jiang Gaopeng, Cumberland Timothy, Fu Xiaogang, Li Matthew, Zhang Jing, Xu Pan, Delaat Stephen, Xiao Meiling, Hemmati Sahar, Li Jenny, Mao Zhiyu, Jin Huile, Yu Aiping, Wang Shun, Chen Zhongwei
College of Chemistry and Materials Engineering, Institute of New Materials and Industrial Technologies, Wenzhou University, Wenzhou, Zhejiang 325035, China.
Department of Chemical Engineering, Waterloo Institute for Nanotechnology, Waterloo Institute for Sustainable Energy, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada.
ACS Sens. 2021 Mar 26;6(3):752-763. doi: 10.1021/acssensors.0c01466. Epub 2020 Dec 11.
The emerging applications of electrochemical gas sensors (EGSs) in Internet of Things-enabled smart city and personal health electronics bring out a new challenge for common EGSs, such as alcohol fuel cell sensors (AFCSs) to reduce the dependence on a pricy Pt catalyst. Here, for the first time, we propose a low-cost novel N,S-codoped metal catalyst (FeNSC) to accelerate oxygen reduction reaction (ORR) and replace the Pt catalyst in the cathode of an AFCS. The optimal FeNSC shows high ORR activity, stability, and alcohol tolerance. Furthermore, the FeNSC-based AFCS not only demonstrates excellent linearity, low detection limit, high stability, and superior sensitivity to that of the commercial Pt/C-based AFCS but also outperforms commercial Pt/C-based AFCS in the exposed cell regarding great linearity, high sensitivity, and great stability. Such a promising sensor performance not just proves the concept of the FeNSC-based ACFS but enlightens the next-generation designs toward low-cost, highly sensitive, and durable EGSs.
电化学气体传感器（EGS）在物联网支持的智慧城市和个人健康电子产品中的新兴应用，给诸如酒精燃料电池传感器（AFCS）等普通EGS带来了新的挑战，即减少对昂贵铂催化剂的依赖。在此，我们首次提出一种低成本的新型氮、硫共掺杂金属催化剂（FeNSC），以加速氧还原反应（ORR）并取代AFCS阴极中的铂催化剂。最佳的FeNSC表现出高ORR活性、稳定性和酒精耐受性。此外，基于FeNSC的AFCS不仅展现出优异的线性度、低检测限、高稳定性，且对商业Pt/C基AFCS具有更高的灵敏度，而且在暴露电池方面，其在线性度、灵敏度和稳定性方面也优于商业Pt/C基AFCS。如此有前景的传感器性能不仅证明了基于FeNSC的ACFS的概念，还为下一代低成本、高灵敏度和耐用的EGS设计提供了启示。
