Effect of platinum dispersion on photocatalytic performance of Pt-TiO2
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Noble metal Pt nanoparticles have been considered as the most effective co-catalyst to improve the photocatalytic hydrogen production activity of TiO2. In this study, the effect of the dispersion of Pt nanoparticles on the photoactivity of TiO2 nanotubes was investigated. Compared with the samples that the co-catalyst of Pt nanoparticles agglomerated or freely dispersed, the sample with the uniformly dispersion of Pt nanoparticles showed a higher performance for photocatalytic hydrogen production. The photocatalysts were characterized systematically by TEM, BET, UV-Vis, XPS, and PL techniques, and the relationship between the structure and the photoactivity was investigated in detail. The results demonstrated that the dispersion status of Pt nanoparticles had a crucial effect on the photocatalytic activity.
KeywordsTiO2 Pt co-catalyst Dispersion Photocatalytic hydrogen production
This work was supported by the National Natural Science Foundation of China (21673066, 51702087 and 21703054), Program for Science & Technology Innovation Talents (15HASTIT043), and Innovative Research Team (16IRTSTHN015) from the University of Henan Province.
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Conflict of interest
The authors declare that they have no conflict of interest.
- Bahruji H, Bowker M, Davies PR, Morgan DJ, Morton CA, Egerton TA, Kennedy J, Jones W (2014) Rutile TiO2–Pd photocatalysts for hydrogen gas production from methanol reforming. Top Catal 58(2–3):70–76Google Scholar
- Jin C, Dai Y, Wei W, Ma X, Li M and Huang B (2017a) Effects of single metal atom (Pt, Pd, Rh and Ru) adsorption on the photocatalytic properties of anatase TiO2. Applied Surface ScienceGoogle Scholar
- Li YH, Xing J, Chen ZJ, Li Z, Tian F, Zheng LR, Wang HF, Hu P, Zhao HJ, Yang HG (2013) Unidirectional suppression of hydrogen oxidation on oxidized platinum clusters. Nat Commun 4:2500Google Scholar
- Ravishankar TN, de Oliveira Vaz M, Khan S, Ramakrishnappa T, Teixeira SR, Balakrishna GR, Nagaraju G, Dupont J (2016) Enhanced photocatalytic hydrogen production from Y2O3/TiO2 nano-composites: a comparative study on hydrothermal synthesis with and without an ionic liquid. New J Chem 40(4):3578–3587CrossRefGoogle Scholar
- Su R, Dimitratos N, Liu J, Carter E, Althahban S, Wang X, Shen Y, Wendt S, Wen X, Niemantsverdriet JW, Iversen BB, Kiely CJ, Hutchings GJ, Besenbacher F (2016) Mechanistic insight into the interaction between a titanium dioxide photocatalyst and Pd cocatalyst for improved photocatalytic performance. ACS Catal 6(7):4239–4247CrossRefGoogle Scholar
- Sun J, Zhang J, Zhang M, Antonietti M, Fu X and Wang X (2012) Bioinspired hollow semiconductor nanospheres as photosynthetic nanoparticles. Nat Commun 3(1)Google Scholar
- Tálas E, Pászti Z, Korecz L, Domján A, Németh P, Szíjjártó G P, Mihály J and Tompos A (2017) PtOx-SnOx-TiO2 catalyst system for methanol photocatalytic reforming: influence of cocatalysts on the hydrogen production. Catalysis Today Google Scholar
- Zhang JW, Guo XY, Jin ZS, Zhang SL, Zhou JF, Zhang ZJ (2003) TEM study on the formation process of TiO2 nanotubes. Chin Chem Lett 14(4):419–422Google Scholar