Selective light absorber-assisted single nickel atom catalysts for ambient sunlight-driven CO2 methanation

Abstract

Ambient sunlight-driven CO 2 methanation cannot be realized due to the temperature being less than 80 °C upon irradiation with dispersed solar energy. In this work, a selective light absorber was used to construct a photothermal system to generate a high temperature (up to 288 °C) under weak solar irradiation (1 kW m −2 ), and this temperature is three times higher than that in traditional photothermal catalysis systems. Moreover, ultrathin amorphous Y 2 O 3 nanosheets with confined single nickel atoms (SA Ni/Y 2 O 3 ) were synthesized, and they exhibited superior CO 2 methanation activity. As a result, 80% CO 2 conversion efficiency and a CH 4 production rate of 7.5 L m −2 h −1 were achieved through SA Ni/Y 2 O 3 under solar irradiation (from 0.52 to 0.7 kW m −2 ) when assisted by a selective light absorber, demonstrating that this system can serve as a platform for directly harnessing dispersed solar energy to convert CO 2 to valuable chemicals.

Black indium oxide a photothermal CO2 hydrogenation catalyst

“…xploitation of the photothermal effect, specifically to enhance the production of synthetic fuels via gas-phase heterogeneous CO 2 hydrogenation, relies upon the nonradiative decay processes of photogenerated electron−hole pairs to simultaneously drive thermochemical and photochemical reactions on the surface of nanostructured materials. Unlike traditional photocatalysis, which is limited to the use of higher-energy photons, photothermal catalysis can theoretically utilize the full wavelength range of the solar spectrum to facilitate surface chemical reactions [1][2][3][4][5][6][7][8][9][10][11][12] .…”

Yttrium oxide as a Q-switcher for the near-infrared erbium-doped fiber laser

“…By detecting the thickness difference between the material coverage area and the silicon substrate in Figure 1A, the exact thickness of Y 2 O 3 was estimated as 7 nm in Figure 1B. According to the definition of two-dimensional (2D) materials, the Y 2 O 3 used here can be considered as two dimensional [59,60]. Meanwhile, the surface morphology of Y 2 O 3 is shown in Figure 1C, which reveals the compactness and uniformity of the material surface.…”

A general bimetal-ion adsorption strategy to prepare nickel single atom catalysts anchored on graphene for efficient oxygen evolution reaction

“…Although IrO 2 and RuO 2 are exceptionally active for OER, the scarcity and high cost substantially hinder their wide applications [6,7] . To address this issue, non-precious materials, such as elemental doped nanocarbons (e.g., S, P, N, O) [8,9] , organic materials [10] , transition metal complexes (e.g., Ni, Co, Fe) [11,12] , oxides/hydroxides [13,14] have been intensively researched as valuable electrocatalysts for OER.…”