Embedded Ruthenium Nanoparticles within Exfoliated Nanosheets of Ti₃C₂T_x for Hydrogen Evolution

Abstract

The carbon component in Ti3C2T x is found to assist the reduction and growth of ruthenium (Ru) during solvothermal processing. As a result, Ti3C2T x is transformed into TiO x with Ru nanoparticle incorporation. Furthermore, the exfoliated nanosheet configuration of the derived substrate is well preserved under a high OH– concentration, associated with the generation of more defective sites. The achieved Ru@M-OH ensemble possesses a low Ru amount of 3.63%, accompanied by enhanced water adsorption and weakened hydrogen combination capability, promoting the hydrogen production under pH-universal conditions.

Nanostructure engineering of ruthenium-modified electrocatalysts for efficient electrocatalytic water splitting

“…In addition, Kong's group designed a catalyst by coupling Ru nanocrystal with Ti 3 C 2 T x substrates. 264 The multiple effects, including the improved surface oxophilicity of Ti 3 C 2 T x -derived substrate, accelerated electron transfer between Ru and matrix, and highly active Ru particles as catalytic sites, account for the boosted performance for hydrogen production. Similar Ru/c-Ti 3 C 2 T x /NF is also developed by Li's group and delivers superior catalytic activity (1.53 V at 10 mA cm −2 ) and stability for water splitting (Fig.…”

“…Reproduced with permission from Wiley. (f) Schematic illustration of the synthesis, (g) Raman spectra and (h) HER polarization curves of Ru@M-OH, Ru@M and Ti 3 C 2 T x -OH catalysts 264. Copyright 2022.…”

Electronic Structure Modulation of Fe–N4–C for Oxygen Evolution Reaction via Transition Metal Dopants and Axial Ligands

“…Thereinto, single-atom catalysts (SACs) represented by Fe–N4–C have the characteristics of high utilization rate, good stability, and abundant active sites, shining in the field of oxygen reduction reaction (ORR). − Theoretically, the oxygen evolution reaction (OER) is the inverse reaction of the ORR, where both have the same intermediates during the reaction process. Therefore, the optimization strategies for the ORR activity of Fe–N4–C, such as heterogeneous doping , or defect engineering, , can also be generalized to the field of OER, where, however, there are few reports on its progress in oxygen evolution. It is evident that there is a limit to improving the catalytic performance of Fe–N4–C by focusing only on the coordination environment provided by the catalyst substrate.…”