Molten‐Salt‐Mediated Synthesis of an Atomic Nickel Co‐catalyst on TiO₂ for Improved Photocatalytic H₂ Evolution

Abstract

Supporting information and the ORCID identification number(s) for the author(s) of this article can be found under: https://doi.Figure 4. a) The high-resolution XPS spectra of O 1s for TiO 2 and Nia/TiO 2 samples. b) Molecular models of O V on TiO 2 , O V on Ni/TiO 2 , and the corresponding formation energy of O V . c) Free energy versus the reaction coordinates of different active sites. The simulation is based on the (101) facet of anatase TiO 2 . d) The linear scan voltammetry curves of TiO 2 and Ni-a/TiO 2 based electrodes. Angewandte Chemie Communications 7233

Fe1/TiO2 Hollow Microspheres: Fe and Ti Dual Active Sites Boosting the Photocatalytic Oxidation of NO

“…[7][8][9][10] Recently, Wang et al prepared atomic Ni doped TiO 2 photocatalyst by heating the mixture of NiCl 2 and TiO 2 in molten salt, which exhibited prompted photocatalytic hydrogen production. [11] However, as almost all of the NiCl 2 in molten solution was discharged after wash, the method is not only costly but also environmental unfriendly.…”

Recent Progress in Non‐Precious Metal Single Atomic Catalysts for Solar and Non‐Solar Driven Hydrogen Evolution Reaction

“…Different from the above two methods, Xiao et al [44] developed a novel molten salt method (MSM) to obtain atomic Ni co-catalyst supported on TiO 2 . In their preparation process, the mixture of LiCl and KCl was used as molten salt to dissolve precursors.…”

“…Transition metal oxides such as FeO x , [95] TiO 2 [24,[42][43][44]96] and WO 3-x [97] are very common SACs' supports. Their reducible property can lead to strong metal-support interaction, which help anchor single atoms.…”

“…Ni doping in TiO 2 could not only serve as co-catalyst, but also facilitate generation of oxygen vacancies (O v ) in TiO 2 , which benefited the charge transfer. [44] Oxygen vacancies themselves also participated in the HER as hydrogen interacted with both Ni atom and neighboring O V . Such synergetic effect remarkably improved the photocatalytic H 2 evolution efficiency compared with Ni nanoparticles loaded on TiO 2 .…”

“…[ 7,42 ] Because the catalytic activity of TiO 2 is largely limited by its intrinsic energy bandgap, non‐noble metal SAs have recently emerged as an ideal co‐catalyst for the promotion of water redox reactions. [ 43,44 ] The introduction of non‐noble metal atoms into TiO 2 not only increased the number of active sites [ 24 ] but also constructed oxygen vacancies, [ 18a ] both are beneficial to catalytic reactivity.…”