Quantifying influence of operational parameters on photocatalytic H2 evolution over Pt-loaded nanocrystalline mesoporous TiO2 prepared by single-step sol–gel process with surfactant template

Titanium phosphates as positive electrode in lithium-ion batteries: composition, phase purity and electrochemical performance

“…Mesoporous materials have taken extensive attention due to their involvement in diversity of applications including, for example, catalysis [3,4], sensors [5,6], host materials for lithium-ion storage [7][8][9][10], hydrogen production [11,12] and storage [13,14], electrochromic windows [15,16], and dye-sensitized solar cells [17][18][19].…”

Photocatalytic activity evaluation of tetragonal CuFe2O4 nanoparticles for the H2 evolution under visible light irradiation

“…In contrast, the CuFe 2 O 4 prepared by solid state reaction are about 1 m in size and badly aggregated, so its photocatalytic activity is the lowest among that of the photocatalysts prepared by these routes. [28]. When the photocatalyst concentration is below its optimum value, the available active sites on the CuFe 2 O 4 particles surface increase with the increasing of photocatalyst concentration, leading to more and more absorption of photons for H 2 generation.…”

CHAPTER 8. Hydrogen Production from Biomass Derivatives over Heterogeneous Photocatalysts

“…Similar results were reported for hydrogen production from aqueous C1-C4 alcohols over Pt/TiO 2 photocatalysts. [56][57][58][59] Thus, the dissociative adsorption of alcohol over Pt/TiO 2 shown in eqn (8.17) appears to mainly govern the reaction rate. Another possibility is that, with increasing carbon chain length and branches, the steric hindrance in the molecule reduces the hydrogen production rate.…”

“…With increasing concentration of substrates, the hydrogen production rate first increased and then decreased in many cases. 46,54,56,65 The increase can be understood by considering the chemical kinetics. However, the addition of excess substrates would disturb the adsorption of water and thus decrease the photocatalytic activity.…”

“…The solution pH can influence various factors such as the surface electric charge of the semiconductor, the chemical state of the substrate, the agglomeration of the photocatalyst particles, the redox potential of water and organic compounds, and the band bending of the semiconductor, which may influence the hydrogen production rate. 48,56,[66][67][68] Thermal acceleration of the photocatalytic reaction rate has been reported by many researchers. 34,36,46.47,52,57,65,69-72 Thermal activation energies of these photocatalytic systems varied with the types of reactions, semiconductors and co-catalysts, or the concentration of organic compounds.…”