Self-assembled transition metal chalcogenides@CoAl-LDH 2D/2D heterostructures with enhanced photoactivity for hydrogen evolution

Abstract

Transition metal chalcogenides (TMCs) have been well-established as ideal low-dimensional systems for photocatalytic hydrogen evolution. Strategies toward improving the activity of these TMCs photocatalysts by crafting heterostructures have been intensively...

3D porous flower-like CoAl2O4 to boost the photocatalytic CO2 reduction reaction

“…Due to the electron transfer of O element in CoAl-LDH, the O ads of CoAl 2 O 4 shifts towards high binding energy. 50 There is no O v in CoAl-LDH, and the hydroxide is removed in the process of calcination. The vibration peak at 531.1 eV disappears, while O v and O lat are introduced.…”

“…During calcination, CoAl-LDH is converted to CoAl 2 O 4 under the high temperature. Due to the electron transfer of O element in CoAl-LDH, the O ads of CoAl 2 O 4 shis towards high binding energy 50. There is no O v in CoAl-LDH, and the hydroxide is removed in the process of calcination.…”

Crystal phase engineering of Ru for simultaneous selective photocatalytic oxidations and H2 production

“…A smaller arc radius means that the catalysts resistance is lower and thus possesses better charge transfer properties. 42,43 This shows that the Ru/TiO 2 composites, and especially fcc Ru/TiO 2 , have a strongly reduced charge transfer resistance with the solution compared to pristine TiO 2 , which leads to an enhanced photoactivity. LSV measurements were performed to measure the polarization curves and to determine the current density of the PCs.…”

Design and synthesis of an S-scheme TiO2homojunction with an adjusted, well-defined phase for directional carrier transfer in solar water splitting

“…When the reaction time reaches to 15 h, the Ti 2p peaks present at 457. Binding energy is negatively related to surface electron density, 28 this means that the anatase and rutile TiO 2 in TiO 2 -TELMs were closely connected due to the formation of homojunction structures, and the electron density gradually increases with increasing the ratio of rutile TiO 2 . [29][30][31] When the ratio of rutile TiO 2 exceeds to a certain value, for example 65% in this work, the electron density of TiO 2 in the TiO 2 -TELM sample gradually decreases, and the electrons transfer from rutile to anatase TiO 2 .…”