Monochromatic light-enhanced photocatalytic CO₂ reduction based on exciton properties of two-dimensional lead halide perovskites

Abstract

Converting CO2 into valuable solar fuels through photocatalysis has been considered a green and sustainable technology that is promising for alleviating global warming and providing energy in an environmentally friendly...

Layered Co–O Cluster Applied to Photocatalytic CO2 Reduction

“…Note that the rate of CO production peaked at the fourth hour with 14 856.50 μmol g –1 h –1 ; however, it nearly dropped linearly with reaction time due to inadequate photoelectrons (Figure S18). In general, its catalytic activity is superior to catalysts with similar two-dimensional structures. ,− After that, the photocatalytic durability of compound 1 was assessed through the XRD pattern and cycling test (Figure c,d). After comparing the three sets of XRD data, it was found that there was no structural shift in the main peak position of the catalyst, which proved that the catalyst had good structural stability.…”

Recent Advances and Opportunities in Low‐Dimensional Layered Perovskites for Emergent Applications beyond Photovoltaics

“…Xu et al reported a series of A 2 Cs n−1 Pb n X 3n+1 (L = BA, HA, OA; X = Cl, Br, I; n = 1, 2) 2D layered perovskites for photocatalytic CO 2 reduction without any sacrificial agents. [272] The illumination wavelength of the monochromic light matched to the exciton absorption can elevate the catalytic CO 2 reduction performances of layered perovskites. (HA) 2 CsPb 2 Br 7 perovskites exhibited highest CO production yield of 158.69 μmol g −1 h −1 and CH 4 yield of 6.9 μmol g −1 h −1 which is higher than the pure 3D CsPbBr 3 perovskite.…”

Highly stable halide perovskites for photocatalysis via multi-dimensional structure design and in situ phase transition

“…Lead halide perovskite nanomaterials have been proved to be promising candidates for photocatalysis as they embody several desirable physical traits such as a tunable band gap width and outstanding light absorption ability. 1,2 So far, they have shown great potential in photocatalytic hydrogen (H 2 ) generation 3,4 and carbon dioxide (CO 2 ) reduction, [5][6][7] among which CsPbBr 3 quantum dots (QDs) are key research targets owing to their simple and low-cost preparation and better crystalline stability compared with other halide perovskites. However, unlike other photocatalysts such as metallic oxide, CsPbBr 3 QDs represent rather poor long-term stability in photocatalysis due to their liquid-like ionic properties.…”