Ultrathin Co(Ni)-doped MoS2 nanosheets as catalytic promoters enabling efficient solar hydrogen production
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The design of efficient artificial photosynthetic systems that harvest solar energy to drive the hydrogen evolution reaction via water reduction is of great importance from both the theoretical and practical viewpoints. Integrating appropriate co-catalyst promoters with strong light absorbing materials represents an ideal strategy to enhance the conversion efficiency of solar energy in hydrogen production. Herein, we report, for the first time, the synthesis of a class of unique hybrid structures consisting of ultrathin Co(Ni)-doped MoS2 nanosheets (co-catalyst promoter) intimately grown on semiconductor CdS nanorods (light absorber). The as-synthesized one-dimensional CdS@doped-MoS2 heterostructures exhibited very high photocatalytic activity (with a quantum yield of 17.3%) and stability towards H2 evolution from the photoreduction of water. Theoretical calculations revealed that Ni doping can increase the number of uncoordinated atoms at the edge sites of MoS2 nanosheets to promote electron transfer across the CdS/MoS2 interfaces as well as hydrogen reduction, leading to an efficient H2 evolution reaction.
KeywordsMoS2 two-dimensional material water splitting photocatalysis
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- Peng, Y.; Shang, L.; Cao, Y. T.; Waterhouse, G. I. N.; Zhou, C.; Bian, T.; Wu, L. Z.; Tung, C. H.; Zhang, T. R. Copper(I) cysteine complexes: Efficient earth-abundant oxidation co-catalysts for visible light-driven photocatalytic H2 production. Chem. Commun. 2015, 51, 12556–12559.CrossRefGoogle Scholar
- Wang, T. Y.; Liu, L.; Zhu, Z. W.; Papakonstantinou, P.; Hu, J. B.; Liu, H. Y.; Li, M. X. Enhanced electrocatalytic activity for hydrogen evolution reaction from self-assembled monodispersed molybdenum sulfide nanoparticles on an Au electrode. Energy Environ. Sci. 2013, 6, 625–633.CrossRefGoogle Scholar
- Chen, J.; Wu, X. J.; Yin, L. S.; Li, B.; Hong, X.; Fan, Z. X.; Chen, B.; Xue, C.; Zhang, H. One-pot synthesis of CdS nanocrystals hybridized with single-layer transition-metal dichalcogenide nanosheets for efficient photocatalytic hydrogen evolution. Angew. Chem. 2015, 127, 1226–1230.CrossRefGoogle Scholar