Titanium Carbide (Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub>) MXene Ornamented with Palladium Nanoparticles for Electrochemical CO Oxidation
Belal Salah, Kamel Eid, Ahmed M. Abdelgwad, Yasmeen Ibrahim, Aboubakr M. Abdullah, Mohammad K. Hassan, Kenneth I. Ozoemena
Abstract
Abstract Titanium carbide (Ti 3 C 2 T x ) MXene possesses various unique physicochemical and catalytic properties. However, the electrochemical CO oxidation performance is not yet addressed experimentally. Herein, Ti 3 C 2 T 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/Ti 3 C 2 T x ) is rationally designed for the electrochemical CO oxidation. The fabrication process is based on the selective chemical etching of Ti 3 AlC 2 and delamination under sonication to form Ti 3 C 2 Tx 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 Ti 3 C 2 T x displayed inferior CO oxidation activity, while Pd/Ti 3 C 2 T x enhanced the CO oxidation activity substantially. This is attributed to the combination of outstanding physicochemical properties of Ti 3 C 2 T x and the catalytic merits of Pd nanoparticles.