A sea cucumber-like nanoporous TiO<sub>2</sub> modified by bimetal Pt<img style="vertical-align:middle" src="https://sdfestaticassets-us-east-1.sciencedirectassets.com/shared-assets/16/entities/sbnd" alt=""/>Au through the dealloying for water splitting期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

A sea cucumber-like nanoporous TiO₂ modified by bimetal PtAu through the dealloying for water splitting

Authors:	Wenyu Shi Chen Ma Haiyang Wang Dong Duan Zhanbo Sun Sen Yang

Affiliation:	School of Science, MOE Key Laboratory for Non-equilibrium Synthesis and Modulation of Condensed Matter, Key Laboratory of Shaanxi for Advanced Functional Materials and Mesoscopic Physics, State Key Laboratory for Mechanical Behaviour of Materials, Xi''an Jiaotong University, Xi''an 710049, China

Abstract:	Bimetal Pt $/>Au modifying nanoporous TiO<sub>2</sub> composites are prepared by dealloying. X-ray diffraction is used to determine the phase constitution. The specific surface area and mesoporous pores are measured by Brunauer-Emmett-Teller. X-ray photoelectron spectroscopy, photoluminescence spectroscopy, UV–Vis diffuse reflectance spectroscopy and Raman spectroscopy are employed to analyse the mutual synergy between Pt and Au. The hydrogen generation rate is measured to determine the photocatalytic performance. The results reveal that TiO<sub>2</sub> is the anatase structure and possess a sea cucumber-like morphology with a large specific surface area. The hydrogen generation rate is 1.745 mmol h<sup>?1</sup> g<sup>?1</sup> for the dealloyed Al<sub>92</sub>Ti<sub>7.86</sub>Pt<sub>0.04</sub>Au<sub>0.1</sub> ribbons under the full spectrum irradiation. This value is 29.6 times, 4.4 times and 1.8 times those of the dealloyed Al<sub>92</sub>Ti<sub>8</sub>, Al<sub>92</sub>Ti<sub>7.9</sub>Au<sub>0.1</sub>, and Al<sub>92</sub>Ti<sub>7.96</sub>Pt<sub>0.04</sub> ribbons, respectively. The above results indicate that the addition of a small amount of Au and Pt significantly enhances the photocatalytic activity for H<sub>2</sub> production. The Au promotes the absorption of visible light, and Pt serve as an electron sink for effective electron-hole pairs separation during the photocatalytic process. It is a feasible and an effective strategy to take full advantages of respective virtues of noble metals and their strong interactions to enhance photocatalytic activity.</td> </tr> <tr> <td align=$
Keywords:	Dealloying Water splitting
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