Engineering heterostructured MoC/MoS catalyst with hydrophilicity/aerophobicity carbothermal shock for efficient alkaline hydrogen evolution.

The exploration of high-performance hydrogen evolution reaction (HER) catalysts is conducive to the development of clean hydrogen energy, yet still remains a challenge. Herein, we rapidly synthesize the MoC/MoS heterostructure on carbon paper (MoC/MoS-CP) carbothermal shock in only two seconds. The construction of the MoC/MoS heterostructure regulates the electronic structure of the Mo site and facilitates charge transfer during the HER process.

Gram-scale synthesis of alstoscholarinoid B a bio-inspired strategy.

Alstoscholarinoid A is a novel rearranged triterpene with an unprecedented 6/6/5/6/6/6 framework and an additional unique C28 → C11-olide F-ring, and displays antihyperuricemic bioactivity. Herein, we report a bio-inspired synthesis of alstoscholarinoid B in a stepwise manner, which is amenable to gram-scale synthesis. The synthesis involved the Chugaev elimination as a key step to realize the migration of the Δ-double bond of oleanolic acid, and also featured a sequential LiHMDS-mediated intramolecular aldol condensation/lactonization to establish the polycyclic ring system.