[Ru (bpy)_3]^(2+)/MCM-41 composite material obtained by loading tris(2, 2' - bipyridine)ruthenium(Ⅱ) ([Ru (bpy)_3]^(2+) ) in siliceous mesoporous MCM-41 was characterized by X-ray powder diffraction, UV-Vis absor...[Ru (bpy)_3]^(2+)/MCM-41 composite material obtained by loading tris(2, 2' - bipyridine)ruthenium(Ⅱ) ([Ru (bpy)_3]^(2+) ) in siliceous mesoporous MCM-41 was characterized by X-ray powder diffraction, UV-Vis absorption and emission spectroscopies. The absorption spectrum of [Ru(bpy)_3]^(2+) /MCM-41 is similar to that of [Ru (bpy)_3]^(2+) aqueous solution, whereas its emission spectrum exhibits hypsochromic shift compared to the solution spectrum. On the other hand, the peak position of the emission spectrum of [Ru(bpy)_3]^(2+)/MCM-41 shifts towards longer wavelength when the loading amount increases.展开更多
Tris （2, 2′-bipyridine） ruthenium （Ⅱ） （Ru（bpy）3^2＋） dichloride was successfully immobilized into the galleria of layered gamma zirconium phosphate （γ-ZrP） preintercalated by butyl amine（BA）. The compou...Tris （2, 2′-bipyridine） ruthenium （Ⅱ） （Ru（bpy）3^2＋） dichloride was successfully immobilized into the galleria of layered gamma zirconium phosphate （γ-ZrP） preintercalated by butyl amine（BA）. The compounds showed extended luminescence lifetime of about four times of unimmobilized metal complex.展开更多
The rate of batch extraction of gallium from alkaline aqueous solution was studied by adding 2-ethylhexanoic acid in organic phase containing 7-substituted-8-hydroxyquinoline(extractant N601), n-decanol and kerosene.T...The rate of batch extraction of gallium from alkaline aqueous solution was studied by adding 2-ethylhexanoic acid in organic phase containing 7-substituted-8-hydroxyquinoline(extractant N601), n-decanol and kerosene.The extraction of Ga can be considered as a pseudo-homogeneous first-order reac- tion.The neutralization and distribution of organic acid between phases during the extraction were studied. The effect of 2-ethylhexanoic acid on the protonation of N601 is insignificant.The extraction of HCl during the stripping of gallium is mainly dependent on the concentration of aqueous hydrochloric acid and the con- tent of N601.Under the given conditions of temperature and N601 content,the acidity of organic phase is a linear function of the concentration of carboxylic acid in organic phase and the concentration of hydrochloric acid in equilibrium aqueous phase,if the latter is 1.9～5.6 mol/L.展开更多
The strong metal-support interaction inducing combined effect plays a crucial role in the catalysis reaction. Herein, we revealed that the combined advantages of MoSe_(2), Ru, and hollow carbon spheres in the form of ...The strong metal-support interaction inducing combined effect plays a crucial role in the catalysis reaction. Herein, we revealed that the combined advantages of MoSe_(2), Ru, and hollow carbon spheres in the form of Ru nanoparticles(NPs) anchored on a two-dimensionally ordered MoSe_(2) nanosheet-embedded mesoporous hollow carbon spheres surface(Ru/MoSe_(2)@MHCS) for the largely boosted hydrogen evolution reaction(HER) performance. The combined advantages from the conductive support, oxyphilic MoSe_(2), and Ru active sites imparted a strong synergistic effect and charge redistribution in the Ru periphery which induced high catalytic activity, stability, and kinetics for HER. Specifically, the obtained Ru/MoSe_(2)@MHCS required a small overpotential of 25.5 and 38.4 mV to drive the kinetic current density of 10 mA cm^(-2)both in acid and alkaline media, respectively, which was comparable to that of the Pt/C catalyst. Experimental and theoretical results demonstrated that the charge transfer from MoSe_(2) to Ru NPs enriched the electronic density of Ru sites and thus facilitated hydrogen adsorption and water dissociation. The current work showed the significant interfacial engineering in Ru-based catalysts development and catalysis promotion effect understanding via the metal-support interaction.展开更多
基金the National Natural Science Foundation of China!(No. 29771013 and No. 29725101 )
文摘[Ru (bpy)_3]^(2+)/MCM-41 composite material obtained by loading tris(2, 2' - bipyridine)ruthenium(Ⅱ) ([Ru (bpy)_3]^(2+) ) in siliceous mesoporous MCM-41 was characterized by X-ray powder diffraction, UV-Vis absorption and emission spectroscopies. The absorption spectrum of [Ru(bpy)_3]^(2+) /MCM-41 is similar to that of [Ru (bpy)_3]^(2+) aqueous solution, whereas its emission spectrum exhibits hypsochromic shift compared to the solution spectrum. On the other hand, the peak position of the emission spectrum of [Ru(bpy)_3]^(2+)/MCM-41 shifts towards longer wavelength when the loading amount increases.
基金This work was supported by the National Science Foundation of China(Nos.20475004,and 20271004).
文摘Tris （2, 2′-bipyridine） ruthenium （Ⅱ） （Ru（bpy）3^2＋） dichloride was successfully immobilized into the galleria of layered gamma zirconium phosphate （γ-ZrP） preintercalated by butyl amine（BA）. The compounds showed extended luminescence lifetime of about four times of unimmobilized metal complex.
文摘The rate of batch extraction of gallium from alkaline aqueous solution was studied by adding 2-ethylhexanoic acid in organic phase containing 7-substituted-8-hydroxyquinoline(extractant N601), n-decanol and kerosene.The extraction of Ga can be considered as a pseudo-homogeneous first-order reac- tion.The neutralization and distribution of organic acid between phases during the extraction were studied. The effect of 2-ethylhexanoic acid on the protonation of N601 is insignificant.The extraction of HCl during the stripping of gallium is mainly dependent on the concentration of aqueous hydrochloric acid and the con- tent of N601.Under the given conditions of temperature and N601 content,the acidity of organic phase is a linear function of the concentration of carboxylic acid in organic phase and the concentration of hydrochloric acid in equilibrium aqueous phase,if the latter is 1.9～5.6 mol/L.
基金supported by the National Natural Science Foundation of China (21972124, 22272148)the Priority Academic Program Development of Jiangsu Higher Education Institution。
文摘The strong metal-support interaction inducing combined effect plays a crucial role in the catalysis reaction. Herein, we revealed that the combined advantages of MoSe_(2), Ru, and hollow carbon spheres in the form of Ru nanoparticles(NPs) anchored on a two-dimensionally ordered MoSe_(2) nanosheet-embedded mesoporous hollow carbon spheres surface(Ru/MoSe_(2)@MHCS) for the largely boosted hydrogen evolution reaction(HER) performance. The combined advantages from the conductive support, oxyphilic MoSe_(2), and Ru active sites imparted a strong synergistic effect and charge redistribution in the Ru periphery which induced high catalytic activity, stability, and kinetics for HER. Specifically, the obtained Ru/MoSe_(2)@MHCS required a small overpotential of 25.5 and 38.4 mV to drive the kinetic current density of 10 mA cm^(-2)both in acid and alkaline media, respectively, which was comparable to that of the Pt/C catalyst. Experimental and theoretical results demonstrated that the charge transfer from MoSe_(2) to Ru NPs enriched the electronic density of Ru sites and thus facilitated hydrogen adsorption and water dissociation. The current work showed the significant interfacial engineering in Ru-based catalysts development and catalysis promotion effect understanding via the metal-support interaction.
