▎ 摘　　要

NOVELTY - Preparation of nitrogen-doped reduced graphene oxide clusters and nano-lamellae molybdenum selenide composite involves mixing graphene oxide, hydrazine hydrate, aqueous ammonia and deionized water and obtaining uniform dispersion of mixed solution (A), adding solution (A) to autoclave vessel, and mixing 1-10 mL aqueous hydrazine solution of selenium powder, 0.1-0.5 g sodium molybdate dihydrate and 30 mL deionized water, dispersing uniformly and obtaining mixed solution (B), adding solution (B) to autoclave vessel, hydrothermally-reacting, drying, annealing and crystallizing. USE - Preparation of nitrogen-doped reduced graphene oxide clusters and nano-lamellae molybdenum selenide composite used for increasing photo-electrochemical decomposition of water for hydrogen evolution. ADVANTAGE - The method efficiently and economically provides nitrogen-doped reduced graphene oxide clusters and nano-lamellae molybdenum selenide composite by simple process. DETAILED DESCRIPTION - Preparation of nitrogen-doped reduced graphene oxide clusters and nano-lamellae molybdenum selenide composite involves mixing 10-30 mg graphene oxide, 0.5-5 mL hydrazine hydrate, 30% aqueous ammonia and 30 mL deionized water and obtaining uniform dispersion of mixed solution (A), adding solution (A) to autoclave vessel, and 1-10 mL mixing solution obtained by dissolving 0.1-0.3 g selenium powder in 1-10 mL hydrazine hydrate and allowing to standstill for 20-40 hours, 0.1-0.5 g sodium molybdate dihydrate and 30 mL deionized water, dispersing uniformly and obtaining mixed solution (B), adding solution (B) to autoclave vessel, hydrothermally-reacting, drying, annealing and crystallizing. The volume ratio of ammonia and hydrazine hydrate is 1:5-50.