Reference of Bis(acetylacetonato)dioxomolybdenum(VI). The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: Bis(acetylacetonato)dioxomolybdenum(VI), is researched, Molecular C10H14MoO6, CAS is 17524-05-9, about Nowotny phase Mo3+2xSi3C0.6 dispersed in a porous SiC/C matrix: A novel catalyst for hydrogen evolution reaction. Author is Feng, Yao; Yu, Zhaoju; Schuch, Jona; Tao, Shasha; Wiehl, Leonore; Fasel, Claudia; Jaegermann, Wolfram; Riedel, Ralf.
The ternary Nowotny phase (NP), with a composition Mo3+2xSi3C0.6 (x = 0.9-0.764), is found to be catalytically active in the field of electrochem. water splitting. The NP embedded in a porous SiC/C nanocomposite matrix is synthesized via a single-source-precursor approach which involves the reaction of allylhydridopolycarbosilane with MoO2(acac)2. Thermal treatment of the single-source-precursor up to 1400°C in a protective atm. results in the in situ formation of nanocrystalline Mo3+2xSi3C0.6 immobilized in a thermally and corrosion-stable SiC/C matrix. The weight fractions of the observed crystalline phases Mo3+2xSi3C0.6 and SiC amount to ca. 28 (26) and 72 (74) wt%, resp., when prepared at 1400°C (1350°C). The porosity of the formed nanocomposite is adjusted by the addition of polystyrene (PS) as a pore former to the single-source-precursor resulting in a sp. surface area up to 206 m2/g. The electrocatalytic activity of the Mo3+2xSi3C0.6/C/SiC nanocomposite with respect to the hydrogen evolution reaction (HER) is characterized by low over potentials of 22 and 138 mV vs reversible hydrogen electrode (RHE) for applying 1 and 10 mA cm-2 of c.d., resp. The analyzed electrocatalytic performance exceeds that of most Mo-based electrocatalysts and shows high stability (over 90%) during 35 h.
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