Pt Single Atoms on TiO <sub>2</sub> Polymorphs—Minimum Loading with a Maximized Photocatalytic Efficiency
نویسندگان
چکیده
For more than 20 years, Pt/TiO2 represents the benchmark photocatalyst/co-catalyst platform for photocatalytic hydrogen (H2) generation. Here, single atom (SA) Pt is decorated on different polymorphs of TiO2 (anatase, rutile, and mixed phase P25) using a simple immersion anchoring approach. On P25 anatase, SAs act as highly effective co-catalyst pure water splitting with H2 evolution activity (4600 µmol h?1 g?1)—on both polymorphs, SA deposition yields significantly active photocatalyst those classic nanoparticles or conventional approaches. provide hardly any co-catalytic effect. Most remarkable, P25, loading from precursor solution very low concentration (<1 ppm Pt) leads already to maximized This optimized efficiency obtained at 5.3 × 105 atoms µm?2 (at macroscopic 0.06 at%)—for higher (a density SAs), reduced due H2/O2 recombination. The interactions that lead this high such concentrations are further discussed.
منابع مشابه
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Delia Fernández-Torre,1,2 Ayhan Yurtsever,3,4,* Jo Onoda,3 Masayuki Abe,5 Seizo Morita,3,4 Yoshiaki Sugimoto,3 and Rubén Pérez1,6,† 1Departamento de Fı́sica Teórica de la Materia Condensada, Universidad Autónoma de Madrid, E-28049 Madrid, Spain 2Instituto de Estructura de la Materia, CSIC, Serrano 121, 28006 Madrid, Spain 3Graduate School of Engineering, Osaka University, 2-1 Yamada Oka, Suita, ...
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ژورنال
عنوان ژورنال: Advanced Materials Interfaces
سال: 2022
ISSN: ['2196-7350']
DOI: https://doi.org/10.1002/admi.202200808