Biomass components toward H₂ and value-added products by sunlight-driven photocatalysis with electronically integrated Au^δ−–TiO₂: concurrent utilization of electrons and holes

Abstract

While photocatalytic overall water splitting progress is mainly hindered by sluggish oxygen evolution kinetics, photocatalytic hydrogen generation using biomass components, such as glycerol as a sacrificial reagent, is a prudent...

Possible handle for broadening the catalysis regime towards low temperatures: proof of concept and mechanistic studies with CO oxidation on surface modified Pd–TiO2

“…44,67,68 A similar kind of observation is noted in the case of decoration of Au/Ag NPs over the TiO 2 surface by the photo-deposition method. 69,70 Possible explanations for an enhancement in the surface potential observed with Pd Photo –TiO 2 are as follows: (a) electron–hole pairs are selectively transferred from the semiconductor to metal NPs. (b) Metal NPs on the semiconductor surface cause the shift of quasi-Fermi level of the semiconductor to a more negative potential.…”

“…44,67,68 A similar kind of observation is noted in the case of decoration of Au/Ag NPs over the TiO 2 surface by the photo-deposition method. 69,70 Possible explanations for an enhancement in the surface potential observed with Pd Photo -TiO 2 are as follows: (a) electron-hole pairs are selectively ). However, a significant increase in surface potential was observed for SM up to 523 K (Fig.…”

Design and development of nanostructured photocatalysts for large-scale solar green hydrogen generation

“…153 However, replacing traditional organic compounds with greener compounds as sacrificial agents will lower the cost, minimize the harmfulness and increase the value, so extensive research in the use of sacrificial agents is required. Based on this, Bajpai et al 263 demonstrated photodeposited Au plasmonic nanoparticles upon TiO 2 photocatalysts for hydrogen production using glycerol as a sacrificial agent which not only consumed the photogenerated holes but also underwent photooxidation to produce value-added products (VAPs) such as glycolaldehyde, dihydroxyacetone, and formic acid. When exposed to sun light, it produced 18 mmol h −1 g −1 , which is the consequence of strong nano-heterojunction formed between Au and TiO 2 .…”

A baby step in assembling and integrating the components of an artificial photosynthesis device with forced heterojunctions towards improved efficiency

“…Success in visible/solar light-driven photocatalytic water splitting and artificial photosynthesis (APS) has eluded the scientific community for far too long. 1–6 Like Si-photovoltaics to generate power directly, will it be possible to produce green hydrogen and/or value-added products (VAP) in sunlight from water and CO 2 ? Can we really make an APS device with double digit solar-to-fuel efficiency (STFE), which is easy to make, economical, scalable, works unassisted in direct sunlight and exhibits sustainable activity?…”