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Precise construction of isolated reactive centers on semiconductors with wellcontrolled configurations affords a great opportunity to investigate the reaction mechanisms in the photocatalytic process and realize the targeted conversion of solar energy to steer the charge kinetics for hydrogen evolution. In the current research, we decorated isolated Ni atoms on the surface of CdS nanowires for efficient photocatalytic hydrogen production. X-ray absorption fine structure investigations clearly demonstrate the atomical dispersion of Ni sites on the surface of CdS nanowires. Experimental investigations reveal that the isolated Ni atoms not only perform well as the real reactive centers but also greatly accelerate the electron transfer via direct Ni-S coordination. Theoretical simulation further documents that the hydrogen adsorption process has also been enhanced over the semi-coordinated Ni centers through electronic coupling at the atomic scale.

The solar-driven evolution of hydrogen from water using particulate photocatalysts is considered one of the most economical and promising protocols for achieving a stable supply of renewable energy. However, the efficiency of photocatalytic water splitting is far from satisfactory due to the sluggish electron-hole pair separation kinetics. Herein, isolated Mo atoms in a high oxidation state have been incorporated into the lattice of Cd 0.5 Zn 0.5 S (CZS@Mo) nanorods, which exhibit photocatalytic hydrogen evolution rate of 11.32 mmol g À 1 h À 1 (226.4 μmol h À 1 ; catalyst dosage 20 mg). Experimental and theoretical simulation results imply that the highly oxidized Mo species lead to mobile-charge imbalances in CZS and induce the directional photogenerated electrons transfer, resulting in effectively inhibited electron-hole recombination and greatly enhanced photocatalytic efficiency.

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Attempts were made to recover succinic acid from aqueous solution by macroporous resin adsorption. The adsorption properties of succinic acid on seven different resins (HPD-300, HPD-400, HPD-450, HPD-500, HPD-826, AB-8, and NKA-9) were compared systematically. According to the adsorption capacity, NKA-9 was chosen as the most suitable resin for succinic acid purification. The influences of solution pH, initial succinic acid concentration, and temperature were studied by the static adsorption method. The maximum adsorption capacity for succinic acid on NKA-9 was 155.9 mg·g–1 and obtained at pH 2.0, initial concentration 50 mg·mL–1 and 10 °C. Langmuir and Freundlich isotherms were used to describe the interactions between solutes and resins, and the equilibrium experimental data were well fitted to the two isotherms. The kinetic data were modeled using pseudo-first-order, pseudo-second-order, and intraparticle diffusion equations. The experimental data were well described by the pseudo-second-order kinetic model.

How to regulate the energy barrier of *COOH is the rate determining step of photocatalytic reduction CO2 to produce gaseous CO. Herein, an appropriate Zn vacancy on ZnIn2S4 was synthesized...

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Doping and defect engineering have been widely used to improve the hydrogen evolution reaction (HER) activity of catalysts. Herein, the improved HER activity of SnS2 nanosheets was systematically investigated. With...