CdS/MoS₂ heterostructures with a branch-like morphology have been prepared via a one-pot hydrothermal method. The as-prepared CdS/MoS₂ heterostructures exhibited enhanced photocatalytic activity and photostability for the degradation of organic dyes. It is believed that the 2D MoS₂ sheets supporting CdS form a large number of interfaces, which may significantly increase the separation of electron/hole pairs, thus greatly enhancing the photocatalytic activity. On the other hand, the matched energy bands of the CdS/MoS₂ heterostructure also allow hole transfer from CdS to MoS₂, thus reducing CdS corrosion.

Simultaneously improving the activity and stability of catalysts for anodic oxygen evolution reaction (OER) in proton exchange membrane water electrolysis (PEMWE) remains a notable challenge. Here, we report a chromium-doped ruthenium dioxide with oxygen vacancies, termed Cr_0.2Ru_0.8O_2-x, that drives OER with an overpotential of 170 mV at 10 mA cm⁻² and operates stably over 2000 h in acidic media. Experimental and theoretical studies show that the synergy of Cr dopant and oxygen vacancy induces an unconventional dopant-mediated hydroxyl spillover mechanism. Such dynamic hydroxyl spillover from Cr dopant to Ru active site changes the rate-determining step from OOH* formation to O₂ formation and thus greatly improves the OER performance. Moreover, the Cr dopant and oxygen vacancy also play a crucial role in stabilizing surface Ru and lattice oxygen in the Ru-O-Cr structural motif. When assembled into the anode of a practical PEMWE device, Cr_0.2Ru_0.8O_2-x enables long-term durability of over 200 h at an ampere-level current density and 60 degrees centigrade.

Colloidal nanocrystal clusters (CNCs), which are composed of many nanocrystal subunits, have attracted intensive attention because they can possess not only the properties of each single subunit but also the collective properties and novel functionalities resulting from the ensembles. However, to date, the successful preparation of metal CNCs has rarely been reported. In this work, a simple one‐pot solvothermal method is developed to prepare PtNi‐alloyed CNCs with homogeneous distribution of Pt and Ni elements, porous feature, and interconnected steady framework. The PtNi CNCs are composed of many PtNi nanocrystals with size around 7–8 nm. Their growth mechanism is proposed through a systematic study. Thanks to the unique structure, the as‐prepared PtNi CNCs show better catalytic performance in methanol oxidation reaction than that of PtNi nanocrystals and Pt/C catalysts. This work is important because it not only provides a new method for the preparation of metal CNCs with desired morphology and properties, but also paves the way for practical applications of metal nanoparticles.

In this study, we have demonstrated a Z-scheme photocatalytic system using Ag@AgCl encapsulated with graphene oxide (GO) (AEGO) composites, where GO and AgCl act as a highly activated photocatalyst.