Interfacial construction of P25/BiWO composites for selective CO photoreduction to CO in gas-solid reactions.

Photocatalysis provides an attractive approach to convert CO into valuable fuels, which relies on a well-designed photocatalyst with good selectivity and high CO reduction ability. Herein, a series of P25/BiWO nanocomposites were synthesized by a simple one-step hydrothermal method. The formation of a heterojunction between BiWO, which absorbs visible light, and P25, which absorbs ultraviolet light, expands the utilization of sunlight by the catalysts, and consequently, leads to a remarkably enhanced CO selective photoreduction to CO.

Engineering surface segregation of perovskite oxide through wet exsolution for CO catalytic oxidation.

Cation segregation occurring near the surface or interfaces of solid catalysts plays an important role in catalytic reactions. Unfortunately, the native surface of perovskite oxides is dominated by passivated A-site segregation, which severely hampers the catalytic activity and durability of the system. To address this issue, herein, we present a wet exsolution method to reconstruct surface segregation in perovskite cobalt oxide.

The interplay between selective etching induced cation defects and active oxygen species for volatile organic compounds degradation.

Surface electronic structure of transition metal oxides plays a vital role in determining the catalytic performance. Herein, we present a selective etching strategy to tune the surface cation defect of the CuWO (CW) catalyst for improving the catalytic activity of volatile organic compounds (VOCs). HRTEM, SEM-EDS, EPR, and XPS show that the chelation of metal ions in acetic acid and ammonium hydroxide can help to remove a small number of surface cations in CW to form suitable W defects.

Study on the mechanism of tunable ferromagnetic composites with different rare earth ions.

Size-controlled FeO nanoparticles doped with rare earth (RE) ions (La, Ce, and Dy) varying from 15 nm to 30 nm were successful synthesized by a hydrothermal method for potential applications in the fields of biomedicine, environmental protection and magnetic memory devices. They possessed good dispersibility, adjustable particle size and nearly spherical shape. The particle grain size was uniformly distributed and showed a low degree of agglomeration in comparison with undoped FeO nanoparticles.

Activating Surface Lattice Oxygen of a Cu/ZnCuO Catalyst through Interface Interactions for CO Oxidation.

Surface lattice oxygen in metal oxides is a common participant in many chemical reactions. Given this, the structural design of catalysts to activate lattice oxygen and moreover investigations into the effect of lattice oxygen on reaction pathways are hot topics. With this in mind, herein we prepare CuO-ZnCuO (ZCO) nanofibers akin to the Trojan horse legend and via an in situ reduction obtain activated Cu/ZnCuO (Cu/ZCO) nanofibers.

Defect-Rich Heterogeneous MoS/rGO/NiS Nanocomposite for Efficient pH-Universal Hydrogen Evolution.

Molybdenum disulfide (MoS) has been universally demonstrated to be an effective electrocatalytic catalyst for hydrogen evolution reaction (HER). However, the low conductivity, few active sites and poor stability of MoS-based electrocatalysts hinder its hydrogen evolution performance in a wide pH range. The introduction of other metal phases and carbon materials can create rich interfaces and defects to enhance the activity and stability of the catalyst.