Synergetic interaction between neighbouring platinum monomers in CO2 hydrogenation

Abstract

Exploring the interaction between two neighbouring monomers has great potential to significantly raise the performance and deepen the mechanistic understanding of heterogeneous catalysis. Herein, we demonstrate that the synergetic interaction between neighbouring Pt monomers on MoS greatly enhanced the CO hydrogenation catalytic activity and reduced the activation energy relative to isolated monomers. Neighbouring Pt monomers were achieved by increasing the Pt mass loading up to 7.5% while maintaining the atomic dispersion of Pt. Mechanistic studies reveal that neighbouring Pt monomers not only worked in synergy to vary the reaction barrier, but also underwent distinct reaction paths compared with isolated monomers. Isolated Pt monomers favour the conversion of CO into methanol without the formation of formic acid, whereas CO is hydrogenated stepwise into formic acid and methanol for neighbouring Pt monomers. The discovery of the synergetic interaction between neighbouring monomers may create a new path for manipulating catalytic properties.

Single‐Atom Ru Doping Induced Phase Transition of MoS2 and S Vacancy for Hydrogen Evolution Reaction

“…According to the criteria that the optical intensity of each atom in the HAADF‐STEM image is positively correlated with its atomic number, the Ru atom should be brighter than the Mo and S atoms . As expected, the Ru is single‐atomically embedded in the plane of the 2D MoS 2 , as shown in Figure e,g, where these bright spots are unambiguously assigned to the Ru atom . Moreover, the enlarged regions (Figure f,h) further reveal that single Ru atoms precisely occupy the sites of the Mo atoms in the lattice arrangement.…”

Densely Populated Single Atom Catalysts

“…Ag, Au, Pt and their alloys are commonly used as catalysts for CO 2 reduction. Li et al reported a SAC which consisted of neighboring Pt monomer on MoS 2 with mass loading up to 7.5 wt%. This catalyst exhibited the synergetic interaction between neighboring Pt monomers and conversion of CO 2 into methanol and formic acid.…”

Eliminating Trap‐States and Functionalizing Vacancies in 2D Semiconductors by Electrochemistry

“…For example, Nb/Re substituting W in WSe 2 can induce p/n‐type doping with long‐term stability compared with doping by molecule adsorption on the surface. Moreover, the substitutional metal atoms can activate the basal plane of MX2 by acting as single‐atom catalysts for a variety of reactions . Furthermore, incorporation of magnetic metal elements (e.g., Ni, Co) can introduce magnetism into nonmagnetic MX 2 , which may be useful for spintronics.…”