Plasmonic Au Nanoparticle@Ti₃C₂T_x Heterostructures for Improved Oxygen Evolution Performance

Abstract

As we know, in plasmonic-enhanced heterogeneous catalysis, the reaction rates could be remarkably accelerated by generating hot carriers in the constituent nanostructured metals. To further improve the reaction rate, well-defined heterostructures based on plasmonic gold nanoparticles on MXene Ti3C2T x nanosheets (Au NPs@Ti3C2T x ) were rationally designed and systematically investigated to improve the performance of the oxygen evolution reaction (OER). The results demonstrated that the catalysis performance of the Au NPs@Ti3C2T x system could be easily tuned by simply varying the concentration and size of Au NPs, and Au NPs@Ti3C2T x with an average Au NP diameter (∼10 nm) exhibited a 2.5-fold increase in the oxidation or reduction current compared with pure Ti3C2T x . The enhanced OER performance can be attributed to the synergistic effect of the plasmonic hot hole injection and Schottky junction carrier trapping. Owing to easy fabrication of Au NPs@Ti3C2T x , the tunable size and concentration of Au NPs loaded on MXene nanosheets, and the significantly enhanced OER, it is expected that this work can lay the foundation to the design of multidimensional MXene-based heterostructures for highly efficient OER performance.

Tuning the Catalytic Water Oxidation Activity through Structural Modifications of High-Nuclearity Mn-oxo Clusters [Mn18M] (M = Sr2+, Mn2+)

“…Here, we report the heterogeneous water oxidation catalytic activity at pH = 7. [24]. Additionally, in this work, the authors showed how weak antiferromagnetic interactions between magnetic units can be tuned using different diamagnetic metal centers.…”

“…Therefore, earth-abundant-based materials with water oxidation catalytic capabilities have been explored in recent years [12,13]. A myriad of systems have been reported displaying diverse water oxidation activities, which comprise mono-or multinuclear organometallic molecular species [14,15], polyoxometalates [16][17][18][19], colloidal particles [20,21], homo-and heterometallic oxides [22][23][24], metal-organic frameworks [25,26] and even metal-free catalysts [27,28]. Moreover, heterogenization of molecular WOCs through their immobilization into solid supports enables the fabrication of hybrid systems that combine the high catalytic activity of molecular catalysts with the stability and recyclability of heterogeneous materials [29,30].…”

“…Interestingly, the nonadecanuclear Mn-oxo cluster (Mn 19 ) was initially investigated by Powell et al due to its unprecedented ground spin state of S = 83/2 [48]. Thereafter, structural variants of this compound where the central Mn II ion was replaced with various heterometals such Dy III , Sr II , Y III , Cd II and Lu III provided a synthetic route for the [Mn 18 M] family [24]. Additionally, in this work, the authors showed how weak antiferromagnetic interactions between magnetic units can be tuned using different diamagnetic metal centers.…”

Construction of MXene/PDMS‐Based Triboelectric Nanogenerators for High‐Performance Cathodic Protection

“…In Figure 4a, the characteristic peak (002) of Ti 3 C 2 powder appears in 11.3°, which illustrates that MXene was successfully added into PDMS. [45,48,49,51,52,[54][55][56][57][58][59][60][61] According to Bragg's equation…”

CoMo2S4 with Superior Conductivity for Electrocatalytic Hydrogen Evolution: Elucidating the Key Role of Co

“…Nevertheless, limited by its intrinsic properties (including limited active site and electrical conductivity), [ 24–27 ] the HER performance of MoS 2 is poor. Many efforts (including plasma modification, [ 28–29 ] materials compositing, [ 30–31 ] and metal doping [ 32–33 ] ) have been paid on modifying MoS 2 to increase its HER performance, among which Co doping is one of the most effective method. Recently, Liu et al.…”