First-principles screening visible-light active delafossite ABO2 structures for photocatalytic application

Honeycomb layered oxides: structure, energy storage, transport, topology and relevant insights

“…Recent reports are also emerging on honeycomb layered oxides as photocatalysts, optical materials, superfast ionic conductors, and so forth. [12][13][14][250][251][252]254,255,267,[441][442][443][444] A grand challenge with most of these materials lies in their handling. Particularly for honeycomb layered oxides comprising alkali ions with large radii such as potassium and rubidium, handling demands the presence of a controlled atmosphere (videlicet, storage in argon-purged glove boxes) as they are sensitive to moisture (hygroscopic) and air.…”

Recent Progress on Honeycomb Layered Oxides as a Durable Cathode Material for Sodium‐Ion Batteries

“…[70][71][72][73][74] In addition, in the field such as superfast ionic conductors, photocatalysts, and optical materials, recent reports also explore the utilization potentiality of honeycomb layered oxides. [61,[75][76][77][78] As for energy storage materials, the structure stability, thermal stability, and phase stability of the material will significantly be improved by constructing honeycomb structure when serving as electrode materials for SIBs (Figure 1a,b). [60,[79][80][81][82][83][84][85] The redox potential during cycling will be raised as well because of the ordered honeycomb network in transition metal layers.…”

Room temperature epoxidation of ethylene over delafossite-based AgNiO2nanoparticles

“…In oxidative catalysis, there is interest in mixed oxides where oxygen is coordinated by different metal ions (e.g., M1-O-M2), which causes significant modification of the electronic structure and reactive properties. [1][2][3] Among the relevant characteristics of mixed oxides providing potential application in selective oxidation reactions the next ones must be mentioned: the multifunctionality of the surface sites, a moderate bond strength of the active oxygen, and the high RedOx ability of the catalyst. 4 Therefore, mixed oxides of transition metals should be regarded as efficient and inexpensive alternative catalytic systems for various oxidative processes.…”

“…The delafossite and related crednerite structure types are described in detail elsewhere. 7,8 The potential of delafossite-type materials in the field of oxidative catalysis is high due to several reasons: (1) the presence in composition of Cu 1+ or Ag 1+ ions for activation of the O 2 molecule; 9 (2) point and extended defects providing additional active sites; 10,11 (3) the possibility for optimization of the RedOx properties by selecting the B cation and/or doping. 12 The properties considered agree well with the presence of highly reactive oxygen forms capable of interacting with reactants at low temperatures as was observed for silver-containing mixed oxides.…”

“…Among the variety of mixed oxides, it is worth highlighting systems with a delafossite-type structure with the general composition ABO 2 , where A is a monovalent metal cation (usually Ag 1+ or Cu 1+ ), and B is a trivalent metal cation (Fe 3+ , Co 3+ , Al 3+ , etc. 5 ) or various combinations of low- and high-valent forms (M 2+ /M 4+ , 6 M 2 2+ /M 5+ 1 ). The delafossite and related crednerite structure types are described in detail elsewhere.…”