Hydrogen Generation of Cu2O Nanoparticles/MnO鈥揗nO2 Nanorods Heterojunction Supported on Sonochemical-Assisted Synthesized Few-Layer Graphene in Water-Splitting Photocathode

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• 作者：Yen-Hsun Su ; Shi-Hong Huang ; Po-Yen Kung ; Tin-Wei Shen ; Wen-Lin Wang
• 刊名：ACS Sustainable Chemistry & Engineering
• 出版年：2015
• 出版时间：September 8, 2015
• 年：2015
• 卷：3
• 期：9
• 页码：1965-1973
• 全文大小：651K
• ISSN：2168-0485

文摘

In this study, we investigated the production of hydrogen by photochemical water splitting. A multi-shaped Cu₂O nanoparticles/MnO鈥揗nO₂ nanorods heterojunction on a few-layer graphene-based electrode serves as the photocathode. Multi-shaped Cu₂O nanoparticles, including truncated cubic shape, cuboctahedral shape, truncated octahedral shape, and octahedral shape, were then coated on square manganese nanorods on a few-layer graphene-based electrode as the photosensitizer. Finally, the efficiency of hydrogen production was measured and recorded. The Cu₂O nanoparticles/MnO鈥揗nO₂ nanorods heterojunction generates photoelectrons to reduce hydrogen ions into hydrogen gas. The manganese dioxide nanorods were combined with cuprous oxide multi-shaped nanoparticles to be simultaneously utilized in hydrogen production as a photochemical water-splitting solar cell. The highest rate of hydrogen generation is 33.0 mL/min m² under solar simulation radiation. This study highlights the significance of a back electron鈥揾ole recombination loss and transportation process on the surface of a water-splitting photocathode, retarding the appearance of the photocurrent and requiring a greater amount of energy from a solar device.