Decorating g-C₃N₄ Nanosheets with Ti₃C₂ MXene Nanoparticles for Efficient Oxygen Reduction Reaction

Abstract

One of the major challenges associated with fuel cells is exploring highly efficient and low-cost electrocatalysts for the oxygen reduction reaction (ORR). Herein, the feasibility of using Ti 3 C 2 MXene nanoparticles (NPs) to enhance the electrocatalytic activity of g-C 3 N 4 for ORR was investigated. By varying the content of Ti 3 C 2 NPs, a series of g-C 3 N 4 /Ti 3 C 2 heterostructures were obtained, displaying enhanced electrocatalytic activity, including a positive shift in both onset and peak potentials toward ORR, compared to the original g-C 3 N 4 in basic solution. We attribute the improvement to the favorable electrical conductivity of welldispersed Ti 3 C 2 MXene nanoparticles and also enhanced O 2 adsorption due to the electronic coupling effect between g-C 3 N 4 and Ti 3 C 2 in the heterostructures. This work demonstrates the potential of earth-abundant MXene family materials to construct low-cost and high-performance electrocatalysts.

Photonic hook formation in near-infrared with MXene Ti3C2 nanoparticles

“…We note that according to eqn (6) and 7, the longitudinal part of the dielectric polarizability of a thin nanorod is similar to the transverse part of a disk polarizability. Thus, the analysis performed in Section.…”

“…15 Integrating MXenes into SPR sensors has signicantly improved sensitivity compared to the set-up without the 2D material. 12,14 While the studies on MXenes are focused towards their use as a 2D material, they can also exist as nanoparticles, 6,21 akes, 13 and nanostructured lms. 15 In addition, the plasmonic properties of the MXene Ti 3 C 2 can be used to enhance light-matter interactions.…”

Recent Progress in MXene‐Based Materials: Potential High‐Performance Electrocatalysts

“…Yu et al [111] proposed a simple method for modifying g-C 3 N 4 nanosheets with Ti 3 C 2 nanoparticles. A series of g-C 3 N 4 /Ti 3 C 2 heterostructures were obtained by changing the content of Ti 3 C 2 NPs.…”

“…The results showed that Au monolayer-modified Mo 2 C was the best ORR catalyst among M ML /Mo 2 C (M = Cu, Pd, Pt, Ag) and had good stability and durability. The ORR on Au ML /Mo 2 C is carried out by a four-electron reduction pathway and its kinetic and thermodynamic activities are comparable or better than those of Pt (100), Pt (111), and commercial Pt/C catalysts. The strong metal-carrier interaction caused a large electronic disturbance on the Au monolayer in contact with Mo 2 C, which enhanced the adsorption of oxygen-containing substances and improved the catalytic activity.…”

Two‐Step Self‐Assembly CdS/g‐C3N4 Heterostructure Composites with Higher Photocatalytic Performance Under Visible Light Irradiation

“…The practical application of g‐C 3 N 4 is restricted by the high recombination fraction of photo‐generated charge carriers . Recently, researchers works on the modification of g‐C3N4 with other nanomaterials through surface and heterojunction engineering, such as metal‐free, metal carbides, metal dichalcogenides, metal phosphides, etc.…”