Electrochemical preparation of defect-engineered titania: Bulk doping versus surface contamination

Reactivity of Hydrogen-Related Electron Centers in Powders, Layers, and Electrodes Consisting of Anatase TiO2 Nanocrystal Aggregates

“…In such a case, proton diffusion in the oxide bulk is the rate-determining process in both charging and discharging, possibly leading to a transient doping of the semiconductor (electrochemical hydrogen doping). 15 , 16 , 28 …”

“…In such a case, proton diffusion in the oxide bulk is the rate-determining process in both charging and discharging, possibly leading to a transient doping of the semiconductor (electrochemical hydrogen doping). 15,16,28 In the present study, we exploit the donor properties of atomic hydrogen to chemically charge under high-vacuum conditions powders and immobilized layers of TiO 2 nanoparticle aggregates and evaluate the chemical reactivity of accumulated electrons toward acceptor species. 2,25 In particular, atomic hydrogen is used to generate charged states on clean surfaces while preserving the metal-to-oxygen ratio of the semiconductor.…”

“…Because of the small size of protons, charge compensation may take place also via ion insertion into subsurface regions of the nanocrystals. In such a case, proton diffusion in the oxide bulk is the rate-determining process in both charging and discharging, possibly leading to a transient doping of the semiconductor (electrochemical hydrogen doping). ,, …”

Quantitative Photoelectrochemical Conversion of Ammonium to Dinitrogen Using a Bromide-Mediated Redox Cycle

“…25 The platinum species, which was used in the anodizing process, was not detected at all on the TNTs surface by the XPS analysis (Figure S2b). 33 Figure 1a shows the Nyquist plots for Blue-TNTs in 3 mM NaBr or NaClO 4 (as the inert electrolyte). The electrochemical properties of the Blue-TNTs electrode were compared in NaBr and NaClO 4 solutions because perchlorate ions (ClO 4 − ) are electrochemically inert (neither oxidized nor reduced) under the test condition.…”

Lowering the fresh water footprint of cooling towers: A treatment-train for the reuse of discharged water consisting of constructed wetlands, nanofiltration, electrochemical oxidation and reverse osmosis

“…Water Nexus combines the development of digital tools for mapping, management and control of fresh water resources with the development of innovative water treatment technology for saline industrial wastewater. A substantial part of Water Nexus is dedicated to developing green and grey technologies that facilitate the reuse of CTW, such as constructed wetlands (CWs) (Wagner et al, 2020b(Wagner et al, , 2020c(Wagner et al, , 2021, advanced oxidation processes for the electrochemical degradation of organics (Bruninghoff et al, 2019(Bruninghoff et al, , 2021Saha et al, 2020a) and nanofiltration (NF) with novel layer-by-layer membranes that allow ion-specific removal (Scheepers et al, 2020(Scheepers et al, , 2021. Recently, the use of hybrid pre-treatment and desalination systems for seawater desalination has shown to increase the water recovery and lower the energy requirements for treatment (Pan et al, 2018b).…”