Research Article


2016, 9(8): 2284–2293


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

Xiaoyan Ma1, Jinquan Li1, Changhua An1 (*), Juan Feng1, Yuhua Chi1, Junxue Liu1, Jun Zhang1 (*), and Yugang Sun2 (*)

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1 State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, and College of Science, China University of Petroleum, Qingdao 266580, China
2 Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, USA

Keywords: MoS2, two-dimensional material,water splitting,photocatalysis
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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.
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Ultrathin Co(Ni)-doped MoS2 nanosheets as catalytic promoters enabling efficient solar hydrogen production. Nano Res. 2016, 9(8): 2284–2293

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