2D PbS Nanosheets with Zigzag Edges for Efficient CO₂ Photoconversion

Abstract

The rational design of transition‐metal sulfide with two‐dimensional (2D) structure and tunable edges on the nanoscale can effectively improve their activity for variously catalytic reactions. Herein, the 2D PbS nanosheets with abundant zigzag edges (e‐PbS NS), which exhibited an excellent performance for CO2 photoconversion to CO, were constructed. The zigzag edges on the PbS NS are beneficial for exposing more active sites and promoting charge separation, thereby accelerating the kinetics process of CO2 photoreduction. This study provides a strategy to regulate structure with effective edge sites for the CO2 reduction.

Cobalt Phosphide Cocatalysts Coated with Porous N‐doped Carbon Layers for Photocatalytic CO2 Reduction

“…After being coated with NC layer, CoP@NC hybrid shows much‐enhanced activity and selectivity for CO 2 reduction reaction, affording a CO evolution rate of 54 μmol h −1 and a CO selectivity of 66 %. The CO 2 ‐to‐CO conversion performance of the core‐shell CoP@NC cocatalyst is comparable to those of reported works in similar Ru sensitized systems (Table S1) [14,19,37,38,43,61–70] . Compared to CoP@NC, both CoP@NC 4‐1 and CoP@NC 1‐1 display inferior CO 2 reduction activity and selectivity, suggesting that thickness of the coated NC layer affects the catalytic performance.…”

Tuning Crystallinity and Surface Hydrophobicity of a Cobalt Phosphide Cocatalyst to Boost CO2 Photoreduction Performance

“…Moreover, the CO selectivity is also dramatically increased from 28.4 % for pristine CoP to 67 % for CoP‐600 (Figure 3b). The CO 2 ‐to‐CO reduction performance of CoP‐600 is comparable or superior to that of most state‐of‐the‐art ruthenium complex sensitized CO 2 fixation systems under analogous conditions (Table S1) [7b,8c,14a,15a,16,27–32] . These results underline that the high‐temperature‐processed post‐treatment strategy is effective to markedly strengthen CO 2 reduction activity and selectivity of CoP cocatalyst.…”

Amino Acid-Assisted Preparation of Homogeneous PbS/CsPbBr3 Nanocomposites for Enhanced Photoelectrocatalytic CO2 Reduction

“…Due to the homogeneous distribution and catalytic activity of PbS, a significant increase of photocurrent density is observed for PbS (0.1) /CsPbBr 3 -12AA. Moreover, the energy level of the PbS conduction band is more negative than the reduced potentials of E (CO2/CO) and E (CO2/CH4) , 39 indicating the thermodynamically feasible reduction of CO 2 to CO and CH 4 .…”

“…As a class of new emerged semiconductors, all-inorganic lead halide perovskites (LHPs) CsPbX 3 have received extensive interest in optoelectronic applications because of their attractive photoelectronic properties such as defect-tolerant band structure, high photoluminescence efficiency, wide absorption range, and tunable band gap expanding the whole visible range. − Such unique features indicate that LHPs can also function as an excellent photosensitizer for CO 2 reduction, water splitting, and degradation of organic species. − However, the fast radiative recombination of photogenerated carriers and poor structural stability of LHPs severely hinder their catalytic performance. ,, Designing composited cocatalysts has been demonstrated to be an effective approach to promote the charge separation and enhance photocatalytic activity. ,,− Although some combinations of metal halide perovskites with metal oxide, metal organic framework, and graphene have been reported, ,− the photocatalytic efficiency is still limited due to their weak intermolecular van der Waals interaction and heterogeneous distribution. Nanostructured metal sulfides have been demonstrated to be good candidates for photocatalytic CO 2 reduction due to their carriers with small effective mass, wide photoresponsive range, and good catalytic activity of surface/edge sites. − Among these catalysts, PbS shows great potential to enhance the catalytic performance of CsPbBr 3 because of the small lattice mismatch, better stability, and the catalytic activity toward CO 2 . − However, PbS/CsPbBr 3 nanocomposites with improved catalytic performance of CRR have rarely been achieved.…”