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• W2920833105 abstract "The development of efficient photocatalytic H 2 -evolution materials requires both rapid electron transfer and an effective interfacial catalysis reaction for H 2 production. In addition to the well-known noble metals, low-cost and earth-abundant non-noble metals can also act as electron-transfer mediators to modify photocatalysts. However, as almost all non-noble metals lack the interfacial catalytic active sites required for the H 2 -evolution reaction, the enhancement of the photocatalytic performance is limited. Therefore, the development of new interfacial active sites on metal-modified photocatalysts is of considerable importance. In this study, to enhance the photocatalytic evolution of H 2 by Ni-modified TiO 2 , the formation of NiS x as interfacial active sites was promoted on the surface of Ni nanoparticles. Specifically, the co-modified TiO 2 /Ni-NiS x photocatalysts were prepared via a two-step process involving the photoinduced deposition of Ni on the TiO 2 surface and the subsequent formation of NiS x on the Ni surface by a hydrothermal reaction method. It was found that the TiO 2 /Ni-NiS x photocatalysts exhibited enhanced photocatalytic H 2 -evolution activity. In particular, TiO 2 /Ni-NiS x (30%) showed the highest photocatalytic rate (223.74 μmol h −1 ), which was greater than those of TiO 2 , TiO 2 /Ni, and TiO 2 /NiS x by factors of 22.2, 8.0, and 2.2, respectively. The improved H 2 -evolution performance of TiO 2 /Ni-NiS x could be attributed to the excellent synergistic effect of Ni and NiS x , where Ni nanoparticles function as effective mediators to transfer electrons from the TiO 2 surface and NiS x serves as interfacial active sites to capture H + ions from solution and promote the interfacial H 2 -evolution reaction. The synergistic effect of the non-noble metal cocatalyst and the interfacial active sites may provide new insights for the design of highly efficient photocatalytic materials. The TiO 2 /Ni-NiS x photocatalyst exhibited enhanced H 2 -evolution performance due to the excellent synergistic effect of Ni nanoparticles as electron-transfer mediators and NiS x as interfacial active sites to promote H 2 evolution." @default.
• W2920833105 created "2019-03-22" @default.
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• W2920833105 date "2019-03-01" @default.
• W2920833105 modified "2023-10-18" @default.
• W2920833105 title "Ni nanoparticles as electron-transfer mediators and NiS as interfacial active sites for coordinative enhancement of H2-evolution performance of TiO2" @default.
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• W2920833105 doi "https://doi.org/10.1016/s1872-2067(18)63157-2" @default.
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