A core shell-structured IrO₂@Ir with considerably improved oxygen evolution activity is developed through the in situ engineering of IrO₂ by a pulsed laser.

Efficient and low-cost transition metal single-atom catalysts (TMSACs) for hydrogen evolution reaction (HER) have been recognized as research hotspots recently with advances in delivering good catalytic activity without noble metals. However, the high-cost complex preparation of TMSACs and insufficient stability limited their practical applications. Herein, a simple top-down pyrolysis approach to obtain P-modified Co SACs loaded on the crosslinked defect-rich carbon nanosheets was introduced for alkaline hydrogen evolution, where Co atoms are locally confined before pyrolysis to prevent aggregation. Thereby, the abundant defects and the unsaturated coordination formed during the pyrolysis significantly improved the stability of the monatomic structure and reduced the reaction barrier. Furthermore, the synergy between cobalt atoms and phosphorus atoms was established to optimize the decomposition process of water molecules, which delivers the key to promoting the slow reaction kinetics of alkaline HER. As the result, the cobalt SAC exhibited excellent catalytic activity and stability for alkaline HER, with overpotentials of 70 mV and 192 mV at current densities of −10 mA cm⁻² and −100 mA cm⁻², respectively.

A new photocatalyst, alveolate Cu _2−x Se microsheets, is developed, which reveals superior photocatalytic discoloration of Rhodamine B.

This review systematically explores strategies to enhance product selectivity in PEC CO ₂ RR, and further analyzes recent advances in C ₁ /C ₂ product synthesis, challenges in selectivity control, and future directions.

The exploration of new heterojunction materials is of great significance in reducing the cost of existing noble metal catalysts and thus realizing the large-scale application of electrocatalytic hydrolysis technology. Herein, a novel CoP/CoMoP₂ heterojunction was synthesized and served as a hydrogen evolution reaction (HER) electrocatalyst. The heterojunction has morphology of nanoporous structure, which is conducive to exposing more active sites and facilitating bubbles transport. The charge distribution is optimized by a strong interface interaction between CoP and CoMoP₂. The catalyst’s conductivity and the adsorption properties of the intermediates have both been enhanced. CoP/CoMoP₂ demonstrates excellent HER activity with an overpotential of 93.6 mV at 10 mA·cm⁻², which is competitive with the reported performance of analogous electrocatalysts. This work provides insights into the development of innovative phosphide-based heterojunction electrocatalysts.