The classical strong metal–support interaction between TiO2 and IB metals was demonstrated.

Supported Au nanocatalysts have attracted intensive interest because of their unique catalytic properties. Their poor thermal stability, however, presents a major barrier to the practical applications. Here we report an ultrastable Au nanocatalyst by localizing the Au nanoparticles (NPs) in the interfacial regions between the TiO2 and hydroxyapatite. This unique configuration makes the Au NP surface partially encapsulated due to the strong metal-support interaction and partially exposed and accessible by the reaction molecules. The strong interaction helps stabilizing the Au NPs while the partially exposed Au NP surface provides the active sites for reactions. Such a catalyst not only demonstrated excellent sintering resistance with high activity after calcination at 800 °C but also showed excellent durability that outperforms a commercial three-way catalyst in a simulated practical testing, suggesting great potential for practical applications.

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Well-defined and strikingly monomorphic single-crystalline Pt nanoflowers were successfully synthesized through the addition of a large amount of iodine ions into polyol process (5 mM H 2 PtCl 6 , 30 mM KI, and 50 mM PVP in ethylene glycol solution at 160°C). The detailed structures of the Pt nanoflowers were studied with high-resolution TEM, indicating that high-quality production of the Pt nanoflowers could be obtained when the KI concentration was increased to six times of H 2 PtCl 6 . The size of Pt nanoflowers could be tuned by changing the concentration of H 2 PtCl 6 with the constant Pt/I ratio (1:6). The formation process of the nanoflowers was investigated by the UV−vis and EXAFS spectroscopic studies, demonstrating that the iodine ions played a key role in inducing the formation of the single-crystalline Pt nanoflowers. After the addition of iodine ions into the polyol synthesis, the Pt−I complex was formed and reduced by different kinetics compared with that of H 2 PtCl 6 to induce the overgrowth of Pt nanocrystals. Additionally, a small portion of iodine element was found to be strongly adsorbed on the surfaces of Pt nanoflowers, which probably also favored the anisotropic overgrowth of Pt nanocrystals resulting in the single-crystalline Pt nanoflowers. A comprehensive set of systematic studies on the synthesis factors (the concentrations of Pt precursor, iodine ions and PVP, reaction temperature, different kinds of Pt precursors and reaction atmosphere) was also reported.

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The rational design of zeolite-based catalysts calls for flexible tailoring of porosity and acidity beyond micropore dimension. To date, dealumination has been applied extensively as an industrial technology for the tailoring of zeolite in micropore dimension, whereas desilication has separately shown its potentials in the creation of mesoporosities. The free coupling of dealumination with desilication will bridge the tailoring at micro/mesopore dimensions; however, such coupling has been prevailingly confirmed as an impossible mission. In this work, a consecutive dealumination-desilication process enables the introduction of uniform intracrystalline mesopores (4-6 nm) into the microporous Al-rich zeolites. The decisive impacts of steaming step have been firstly discovered. These findings revitalize the functions of dealumination in porosity tailoring, and stimulate the pursuit of new methods for the tailoring of industrially relevant Al-rich zeolites.

Graphical abstract: (maximum size 8cm x 4cm.) Text: one sentence: (of maximum 20 words, highlighting the novelty of the work.)The photo-Fenton process of PB/TiO 2 nanocomposites to degrade various organic pollutants was firstly investigated with Mössbauer spectroscopy and EPR. ABSTRACTNowadays, lots of researches focus on accelerating the Fe II /Fe III redox cycles to increase the pseudo first-order rates of Fenton reaction. Here Prussian blue/titanium dioxide nanocomposites (PB/TiO 2 NPs) were firstly designed as heterogeneous photo-Fenton catalyst to increase the Fe II recovery in degrading organic contaminants in water. The PB/TiO 2 NPs were characterized by various analytical techniques to obtain optimum ratio of PB and TiO 2 for efficient degradation of organics. The performance of the catalysts was tested by following the removal of rhodamine B dye, salicylic acid, m-cresol, and isophorone under various conditions (pH, ratios of PB and TiO 2 , H 2 O 2 , and temperature). Formation of the intermediates of iron (Fe II /Fe III ) in the studied system using Mössbauer spectroscopy was explored for the first time and presents important insights on the relevant catalytic phenomena. The generation of • OH radicals in the reaction system was identified using electron paramagnetic resonance spectroscopic techniques. Results demonstrated that the developed PB/TiO 2 NPs were stable and could degrade organic contaminants in water efficiently.

Morphology-controllable KFexZn1−x[Co(CN)6] with different cesium uptake capacities were synthesized, based on which a Zn2+-modulated model was proposed.