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Nano Research

Article Title

Ultrathin Co(Ni)-doped MoS2 nanosheets as catalytic promoters enabling efficient solar hydrogen production

Keywords

MoS2, two-dimensional material, water splitting, photocatalysis

Abstract

The design of efficient artificial photosynthetic systems that harvest solarenergy to drive the hydrogen evolution reaction via water reduction is of greatimportance from both the theoretical and practical viewpoints. Integratingappropriate co-catalyst promoters with strong light absorbing materials representsan ideal strategy to enhance the conversion efficiency of solar energy in hydrogenproduction. Herein, we report, for the first time, the synthesis of a class ofunique hybrid structures consisting of ultrathin Co(Ni)-doped MoS2 nanosheets(co-catalyst promoter) intimately grown on semiconductor CdS nanorods (lightabsorber). The as-synthesized one-dimensional CdS@doped-MoS2 heterostructuresexhibited very high photocatalytic activity (with a quantum yield of 17.3%) andstability towards H2 evolution from the photoreduction of water. Theoreticalcalculations revealed that Ni doping can increase the number of uncoordinatedatoms at the edge sites of MoS2 nanosheets to promote electron transfer acrossthe CdS/MoS2 interfaces as well as hydrogen reduction, leading to an efficientH2 evolution reaction.

Graphical Abstract

Publisher

Tsinghua University Press

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