A versatile and ultra-sensitive sensor platform based on lamellar Ti₃C₂T_x (MXene)-modified glassy carbon electrode has been developed for the detection of bromate (BrO₃⁻) in water. MXene showed unique electrocatalytic properties towards effective BrO₃⁻ reduction and the developed sensor displayed a linear response for the BrO₃⁻ concentration from 50 nM to 5 μM with a detection limit of 41 nM. The catalytic reduction of BrO₃⁻ by MXene was assumed by an increase of the peak current and a shift to lower potential. Surface changes to MXene after electrocatalytic reduction of BrO₃⁻ was investigated by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). The formation of trace TiO₂ crystals at the surface of Ti₃C₂T_x during the electrochemical reduction of BrO₃⁻ have confirmed the redox reaction between BrO₃⁻ and MXene. Also the developed sensor showed excellent selectivity for BrO₃⁻ among other interfering ions. This work provides an evidence for the application of MXene as an effective platform for detection of water contaminants especially when its redox functionality can be utilized.

基于层状钛一种多功能的，超灵敏的传感器平台₃ c ^ ₂ Ť _X（MXene）改性玻碳电极已被开发用于检测溴酸盐（BRO ₃ ^-在水中）。MXene显示独特电催化性能实现有效的BrO ₃ ^-还原和发达传感器显示为的BrO线性响应₃ ^-浓度为50 nM至5μM的41 nM的检测限。的BrO的催化还原₃ ^-由MXene通过增大峰值电流的和移位，以降低潜在的假设。表面变化MXene电催化还原人权法后₃ ^-通过扫描电子显微镜（SEM），透射电子显微镜（TEM）和X射线光电子能谱（XPS）进行了研究。微量的TiO的形成_2个晶体在钛的表面₃ Ç ₂ Ť _X电化学还原的BrO的期间₃ ^-已证实的BrO之间的氧化还原反应₃ ^-和MXene。也发达传感器表现出优良的选择性的BrO ₃ ^-其他干扰离子之间。这项工作为将MXene用作检测水污染物的有效平台提供了证据，尤其是当可以利用其氧化还原功能时。