Layered double hydroxides and their composites as high-performance photocatalysts for CO₂ reduction

Abstract

Over the past decade, layered double hydroxides (LDHs) have attracted much attention due to their many advantages in the field of CO2 photoreduction, such as superior CO2 adsorption and tunable...

Deciphering the amplification of dual catalytic active sites of Se-doped NiV LDH in water electrolysis: a hidden gem exposure of anion doping at the core-lattice LDH framework

“…This gives the system more unpaired available electrons for resonance, which in turn results in a stronger EPR signal. 32,43 It is worth mentioning that for Se-NiV LDH, the small intense peak at ∼g = 2.865 may stem from either a structural defect formed aer the comparatively big size Se ion doping, or from the enhancement of the paramagnetic center which interacts with the nearby positive center, inuencing the hyperne low intense EPR peak. For further evidence, band gap analysis via Tauc plot was performed and is highlighted in Fig.…”

Challenges in Photocatalytic Carbon Dioxide Reduction

“…The energy crisis and environmental difficulties are now major global problems due to the quick expansion of modern industry and the rise in population. − A viable approach to address the aforementioned issues is to use solar energy to drive chemical processes on semiconductor photocatalysts. − Recently, numerous efforts have been made to adjust the selectivity of a particular product in addition to enhancing the effectiveness of the CO 2 photoconversion or related processes. − Despite improvements over the previous few decades, CO 2 photoconversion performance is still subpar and well below the desired 10% solar-to-fuel efficiency. − Besides, some challenges including ambiguous reaction pathways and product selectivity, unclear charge transfer mechanism, overestimate of product yield due to non-negligible contamination (e.g., sacrificial agents), etc. also are widespread and are difficult to fully solve.…”

Layered double hydroxides‐based Z‐scheme heterojunction for photocatalysis

“…It is worth noting that large special area, tunable bandgap, and abundant reaction sites endow LDHs with more advantage in photocatalysis. [27][28][29] However, more challenges, for instance, weak conductivity, rapid photogenerated carrier recombination and low light responsiveness hinder its photocatalytic activity. [30][31][32] Thus, modification projects or introduction of cocatalysts is crucial.…”