▎ 摘　　要

Efficient water splitting through electrocatalysis has been studied extensively in modern energy devices, whereas the development of catalysts with high activity and stability with low-load Pt is still a great challenge. Through the spatial confinement effect and template method, herein, hollow graphene spheres with functionalized Pt nanoclusters (Pt/GHSs) are constructed and developed as effective electrocatalysts for the hydrogen evolution reaction (HER). Electrochemical tests show that Pt/GHSs exhibit a high electrocatalytic activity and stability compared with commercial Pt/C catalysts toward HER in alkaline media. The electric double-layer capacitance value reaches 26.0 mF cm(-2), indicating that Pt/GHSs have a large electrochemically active area. Meanwhile, the load of metal Pt in the Pt/GHSs is only one-fifth of commercial Pt/C catalysts, which significantly reduces the production cost of the catalyst. Herein a new opportunity for the low-cost mass production of efficient and stable catalysts for practical applications is provided.