Titanium carbide (Ti₃C₂T_x) MXene possesses various unique physicochemical and catalytic properties. However, the electrochemical CO oxidation performance is not yet addressed experimentally. Herein, Ti₃C₂T_x (T_X=OH, O, and F) ordered and exfoliated two-dimensional nanosheets ornamented with semi-spherical palladium nanoparticles (2.5 Wt. %) with an average diameter of (10±1 nm) (denoted as Pd/Ti₃C₂T_x) is rationally designed for the electrochemical CO oxidation. The fabrication process is based on the selective chemical etching of Ti₃AlC₂ and delamination under sonication to form Ti₃C₂Tx nanosheets that are used as a substrate and reducing agent for supporting in situ growth of Pd nanoparticles via impregnation with Pd salt. Interestingly, Pd-free Ti₃C₂T_x displayed inferior CO oxidation activity, while Pd/Ti₃C₂T_x enhanced the CO oxidation activity substantially. This is attributed to the combination of outstanding physicochemical properties of Ti₃C₂T_x and the catalytic merits of Pd nanoparticles.

中文翻译：

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用钯纳米颗粒装饰的碳化钛 (Ti3C2Tx) MXene 用于电化学 CO 氧化

碳化钛 (Ti ₃ C ₂ T _x ) MXene 具有各种独特的物理化学和催化性能。然而，电化学CO氧化性能尚未通过实验解决。在此，Ti ₃ C ₂ T _x (T _X =OH, O, and F) 有序和剥离的二维纳米片装饰有平均直径为 (10±1 nm) 的半球形钯纳米粒子 (2.5 Wt. %) （表示为 Pd/Ti ₃ C ₂ T _x）是为电化学 CO 氧化而合理设计的。制造工艺基于对 Ti ₃ AlC _{2的选择性化学蚀刻}和在超声下分层以形成Ti ₃ C ₂ Tx 纳​​米片，该纳米片用作基底和还原剂，用于通过用Pd盐浸渍来支持Pd纳米颗粒的原位生长。有趣的是，无 Pd 的 Ti ₃ C ₂ T _x表现出较差的 CO 氧化活性，而 Pd/Ti ₃ C ₂ T _x显着增强了 CO 氧化活性。这归因于 Ti ₃ C ₂ T _x优异的物理化学性质和 Pd 纳米粒子的催化优点的结合。