研究目的
To investigate the plasmonic Cu with controlled diameter over TiO2 photoelectrode for solar-to-hydrogen conversion.
研究成果
The deposition of Cu NPs can reduce the electron transfer resistance and the recombination rate of electron-hole pairs, which is conducive to the enhancement of photocurrent density and hydrogen production rate. The hydrogen production rate of as-prepared Cu/TNTAs was stable during irradiation of 2 h. Moreover, SPR effect of plasmonic Cu were comparable to Ag NPs, and the PEC properties and hydrogen production performance of Cu/TNTAs were similar to Ag/TNTAs.
研究不足
The study focuses on the application of plasmonic Cu in photoelectrochemical (PEC) system, but the stability of Cu NPs in the air and their oxidation are potential areas for optimization.
1：Experimental Design and Method Selection:
Cu NPs with controlled diameter were deposited on TiO2 nanotube arrays (TNTAs) by using a pulse electrochemical deposition method.
2：Sample Selection and Data Sources:
TNTAs were prepared by anodization.
3：List of Experimental Equipment and Materials:
Field-emission scanning electron microscope (SEM, Hitachi S4800), energy dispersive X-ray spectrometer (EDS), UV-Vis spectrophotometer (Avantes, Avaspec-2048L-USB2), fluorescence spectrophotometer (PL, Hitachi, F-7000), electrochemical workstation (Autolab PGSTAT302 N, Switzerland), solar simulator (91160, Newport).
4：Experimental Procedures and Operational Workflow:
The loading of Cu NPs was completed in a three-electrode system. The pulse current was -15 mA with a
5：1 s on-time and 3 s off-time. The deposition cycle was fixed at various values. Data Analysis Methods:
The photoelectrochemical measurements were carried out in a three-electrode system. The hydrogen production activities were online detected by gas-chromatograph.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
