pH electrodes exhibited wide applications in the fields of food science, environmental science, and bioanalytical analysis. In this work, we demonstrate the facile fabrication of silver-antimony (Ag–Sb) binary alloy electrodes through a one-step melt casting method. XRD, SEM and EDS were used to characterize the alloy electrodes. The response mechanism of the pH electrode was studied by Tafel plots, which clarified the role of metal (Sb) and metal oxide (SbO_ads) in the pH response process. The corrosion resistance of the alloy electrode was researched by electrochemical impedance spectroscopy (EIS), which proved the advantages of the Ag–Sb alloy electrodes. In addition, our Ag–Sb pH electrodes exhibited promising sensing performance with the near-Nernstian response sensitivity is 54.6 mV/pH. The other performances including response time, stability, reversibility, hysteresis, and temperature coefficient, also demonstrated that the Ag–Sb binary alloy electrodes have good pH speciality, and it will potential applications for environmental monitoring in situ. These research results can complement and perfect the theoretical basis of metal/metal oxide pH electrodes, thus guiding the preparation of metal/metal oxide pH electrodes and promoting the exact and extensive application of metal/metal electrodes in more aspects.

pH电极在食品科学，环境科学和生物分析领域具有广泛的应用。在这项工作中，我们演示了通过一步熔铸法轻松制造银锑（Ag-Sb）二元合金电极的方法。XRD，SEM和EDS用于表征合金电极。pH电极的响应机制是由塔菲尔图，其中澄清金属（Sb）和金属氧化物的作用的研究（非晶态SbO_广告）在pH响应过程中。通过电化学阻抗谱（EIS）研究了合金电极的耐腐蚀性，证明了Ag-Sb合金电极的优点。此外，我们的Ag-Sb pH电极表现出令人鼓舞的感测性能，近能斯特响应灵敏度为54.6 mV / pH。其他性能包括响应时间，稳定性，可逆性，滞后性和温度系数，也表明Ag-Sb二元合金电极具有良好的pH特殊性，将有可能在现场进行环境监测。这些研究结果可以补充和完善金属/金属氧化物pH电极的理论基础，