Boosting photoelectrochemical water oxidation by sandwiching gold nanoparticles between BiVO4 and NiFeOOH
文献信息
Hang Yin, Yanzhen Guo, Nan Zhang, Yuyang Wang, Shouren Zhang, Ruibin Jiang
BiVO4 is one of the promising photoanodes for water oxidation, while its efficiency is much lower than the theoretical value because of the rapid recombination rate and low activity for the oxygen evolution reaction (OER). Herein, a BiVO4/Au/NiFeOOH sandwich structure is constructed for enhanced PEC water oxidation. In comparison with BiVO4/NiFeOOH, the incorporation of Au nanoparticles (NPs) can further enhance the PEC performance toward water oxidation. The BiVO4/Au/NiFeOOH photoanode exhibits a photocurrent density of 5.3 mA cm−2 at 1.23 V, which is 3.47 times that of BiVO4. Systematic experimental and theoretical studies indicate that Au NPs enhance the PEC water oxidation through the generation of hot holes through an interband transition, improving the photocarrier separation, and enhancing the water oxidation activity of NiFeOOH. This work not only provides a new way for the fabrication of highly efficient photoanodes for water oxidation, but also deepens the understanding of the role of Au NPs in promoting PEC water splitting.
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来源期刊
Journal of Materials Chemistry A
Journal of Materials Chemistry A, B & C cover high quality studies across all fields of materials chemistry. The journals focus on those theoretical or experimental studies that report new understanding, applications, properties and synthesis of materials. The journals have a strong history of publishing quality reports of interest to interdisciplinary communities and providing an efficient and rigorous service through peer review and publication. The journals are led by an international team of Editors-in-Chief and Associate Editors who are all active researchers in their fields. Journal of Materials Chemistry A, B & C are separated by the intended application of the material studied. Broadly, applications in energy and sustainability are of interest to Journal of Materials Chemistry A, applications in biology and medicine are of interest to Journal of Materials Chemistry B, and applications in optical, magnetic and electronic devices are of interest to Journal of Materials Chemistry C. More than one Journal of Materials Chemistry journal may be suitable for certain fields and researchers are encouraged to submit their paper to the journal that they feel best fits for their particular article. Example topic areas within the scope of Journal of Materials Chemistry A are listed below. This list is neither exhaustive nor exclusive. Artificial photosynthesis Batteries Carbon dioxide conversion Catalysis Fuel cells Gas capture/separation/storage Green/sustainable materials Hydrogen generation Hydrogen storage Photocatalysis Photovoltaics Self-cleaning materials Self-healing materials Sensors Supercapacitors Thermoelectrics Water splitting Water treatment
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