Transition-metal incorporation and Co-Sr/Mn-Sr mixed-modifier effect in metaphosphate glasses

Trends in Effective Diffusion Coefficients for Ion-Exchange Strengthening of Soda-Lime-Silicate Glasses

“…The model then rationalizes attractive reactions among cation species and their effect on the overall activation energy. Major additional factors which then affect the transport properties (Bunde et al, 1996) include site mismatch, site relaxation (frequently called structural relaxation), interionic interaction, and the mixedmodifier effect (Maass et al, 1992;Karlsson et al, 2015;Poletto Rodrigues et al, 2016;Griebenow et al, 2017).…”

Fluoride-sulfophosphate glasses as hosts for broadband optical amplification through transition metal activators

“…Furthermore, non-linear cross-interaction among the cations leads to specific mixing effects, which are frequently made use of in the design of certain macroscopic properties. 19 – 21 It was found that the stability of phosphate glasses can be enhanced significantly through the introduction of sulfate anions, [SO 4 ] 2– , both in terms of rheology (liquid fragility) and chemical properties (corrosion resistance). 22 – 24 Beyond this immediate, practical interest, these sulfophosphate glasses have also been identified as interesting host species for transition metal ions as they provide a very peculiar local environment of sulfate as well as phosphate entities in which ligand field splitting and local redox deviate from conventional molecular field considerations.…”

Sodium Cobalt Metaphosphate as an Efficient Oxygen Evolution Reaction Catalyst in Alkaline Solution

“…Further, phosphate bending motions contributing into a stronger band envelope between 420 and 630 cm À1 . [23,24] In Figure 2 e, we summarized the fitted Co 2p emission spectrum X-ray photoelectron spectroscopy (XPS), convoluted into 2p 1/2 and 2p 3/2 spin-orbit doublets and the characteristic Co 2+ satellite peak (shown as Sat.). [25,26]…”

“…The spectra are generally composed of characteristic vibrations of PO 2 (terminal) and POP (bridging) bands. [23,24] In Figure 2 e, we summarized the fitted Co 2p emission spectrum X-ray photoelectron spectroscopy (XPS), convoluted into 2p 1/2 and 2p 3/2 spin-orbit doublets and the characteristic Co 2+ satellite peak (shown as Sat.). [21] These carbon entities seem to be localized because the Raman spectra recorded at different regions show spectra with and without such carbon as evident from TGA (in O 2 ) of as-synthesized NCoM-Cb-Ar catalyst with no weight loss ( Figure S7) which is a result of much less graphitization.…”