A CsPbBr₃ Perovskite Quantum Dot/Graphene Oxide Composite for Photocatalytic CO₂ Reduction

Abstract

Halide perovskite quantum dots (QDs), primarily regarded as optoelectronic materials for LED and photovoltaic devices, have not been applied for photochemical conversion (e.g., water splitting or CO reduction) applications because of their insufficient stability in the presence of moisture or polar solvents. Herein, we report the use of CsPbBr QDs as novel photocatalysts to convert CO into solar fuels in nonaqueous media. Under AM 1.5G simulated illumination, the CsPbBr QDs steadily generated and injected electrons into CO, catalyzing CO reduction at a rate of 23.7 μmol/g h with a selectivity over 99.3%. Additionally, through the construction of a CsPbBr QD/graphene oxide (CsPbBr QD/GO) composite, the rate of electron consumption increased 25.5% because of improved electron extraction and transport. This study is anticipated to provide new opportunities to utilize halide perovskite QD materials in photocatalytic applications.

CO2 Reduction: From the Electrochemical to Photochemical Approach

“…f) Schematic of CO 2 photoreduction over the CsPbBr 3 QD/GO photocatalyst. Reproduced with permission 202. Copyright 2017, American Chemical Society.…”

Efficient Bifacial Passivation with Crosslinked Thioctic Acid for High‐Performance Methylammonium Lead Iodide Perovskite Solar Cells

“…[1][2][3][4][5] Owing to their high optical absorption coefficient, low exciton binding energy, long charge carrier diffusion lengths, high photoluminescence (PL) quantum yield, suitable bandgap, and energy level, perovskite solar cells (PSCs) are emerging as promising candidates for the next-generation thin-film solar cells. [1][2][3][4][5] Owing to their high optical absorption coefficient, low exciton binding energy, long charge carrier diffusion lengths, high photoluminescence (PL) quantum yield, suitable bandgap, and energy level, perovskite solar cells (PSCs) are emerging as promising candidates for the next-generation thin-film solar cells.…”

Encapsulating Perovskite Quantum Dots in Iron‐Based Metal–Organic Frameworks (MOFs) for Efficient Photocatalytic CO2 Reduction

“…[17][18][19][20] In this regard, lead halide perovskite (LHP) NCs are ordinarily endowed with high defect tolerance and long photogenerated carrier lifetime,t riggering their widespread applications in photovoltaic and optoelectronic devices. [24][25][26][27][28][29][30][31][32][33] In photocatalytic CO 2 reduction, LHP QDs have been demonstrated to be capable of converting CO 2 into CO and CH 4 . [24][25][26][27][28][29][30][31][32][33] In photocatalytic CO 2 reduction, LHP QDs have been demonstrated to be capable of converting CO 2 into CO and CH 4 .…”

“…[21][22][23] Most recently,L HP quantum dots (QDs) have also been actively pursued as catalysts in photocatalytic fields. [27] Loading LHP QDs on graphene oxide [26] or g-C 3 N 4 [24] can facilitate the charge separation, bringing forth improved catalytic performance for CO 2 reduction. [27] Loading LHP QDs on graphene oxide [26] or g-C 3 N 4 [24] can facilitate the charge separation, bringing forth improved catalytic performance for CO 2 reduction.…”