Abstract
The synergetic effects of nickel (Ni) and graphene (G) as promotors for TiO2 on photocatalytic hydrogen production have been observed. Ni/TiO2, G/TiO2, and Ni-G/TiO2 were synthesized via a wet impregnation method. While G-TiO2 gave a similar H2 yield to that of the unmodified TiO2, Ni/TiO2 tripled it for the same reaction time. Surprisingly, Ni-G/TiO2 exhibits a 10-fold H2 production as compared to the unmodified case. A mechanism is proposed in which Ni and graphene cooperate for the betterment of photocatalytic hydrogen production by facilitating concerted trap** and relay of electrons, thereby realizing effective charge-carrier separation and conduction.
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Data availability
The data that support the findings of this study will be made available by the corresponding author upon reasonable request.
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Acknowledgments
This research was funded by The Directorate of Research and Development Universitas Indonesia (Risbang UI) through International Indexed Publication Grant (PUTI Q2 2022) with contract No: NKB-700/UN2.RST/HKP.05.00/2022.
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Ibadurrohman, M., Rahmatallah, Azzahra, J. et al. Synergetic effects of Ni and graphene as promotors for TiO2 as photocatalysts for efficient hydrogen production. MRS Communications 12, 1263–1270 (2022). https://doi.org/10.1557/s43579-022-00305-2
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DOI: https://doi.org/10.1557/s43579-022-00305-2