题目：

Metal-Free Efficient Photocatalyst for Stable Visible Water Splitting via a Two-Electron Pathway

作者：

Juan Liu¹, Yang Liu¹, Naiyun Liu¹, Yuzhi Han¹, Xing Zhang¹, Hui Huang¹, Yeshayahu Lifshitz^1,2,*, Shuit-Tong Lee1*, Jun Zhong¹, Zhenhui Kang^1,*

单位：

¹Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices, Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou 215123, China

²Department of Materials Science and Engineering, Technion, Israel Institute of Technology, Haifa 3200003, Israel

摘要：

The use of solar energy to produce molecular hydrogen and oxygen (H₂ and O₂) from overall water splitting is a promising means of renewable energy storage. In the past 40 years, various inorganic and organic systems have been developed as photocatalysts for water splitting driven by visible light. These photocatalysts, however, still suffer from low quantum efficiency and/or poor stability. We report the design and fabrication of a metal-free carbon nanodot–carbon nitride (C3N4) nanocomposite and demonstrate its impressive performance for photocatalytic solar water splitting. We measured quantum efficiencies of 16% for wavelength λ = 420 ± 20 nanometers, 6.29% for λ = 580 ± 15 nanometers, and 4.42% for λ = 600 ± 10 nanometers, and determined an overall solar energy conversion efficiency of 2.0%. The catalyst comprises low-cost, Earth-abundant, environmentally friendly materials and shows excellent stability.

影响因子：

31.477

分区情况：

2区

链接：

http://science.sciencemag.org/content/347/6225/970.full

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