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nature materials 最新: TiO2用于光解水制氢
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A leading approach for large-scale electrochemical energy production with minimal global-warming gas emission is to use a renewable source of electricity, such as solar energy, to oxidize water, providing the abundant source of electrons needed in fuel synthesis.We report corrosion-resistant, nanocomposite anodes for the oxidation of water required to produce renewable fuels. Silicon, an earth-abundant element and an efficient photovoltaic material, is protected by atomic layer deposition (ALD) of a highly uniform, 2nm thick layer of titanium dioxide (TiO2) and then coated with an optically transmitting layer of a known catalyst (3nm iridium). Photoelectrochemical water oxidation was observed to occur below the reversible potential whereas dark electrochemicalwater oxidationwas found to have low-to-moderate overpotentials at all pH values, resulting in an inferred photovoltage of550 mV.Water oxidation is sustained at these anodes for many hours in harsh pH and oxidative environments whereas comparable silicon anodes without the TiO2 coating quickly fail. The desirable electrochemical efficiency and corrosion resistance of these anodes is made possible by the low electron-tunnelling resistance (<0:006cm2 for pC-Si) and uniform thickness of atomic-layer deposited TiO2. |
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先进材料 | 半导体光催化与纳米TiO2 | 光催化 材料 | organic solar cell |
DSSC(偏重以TiO2为光阳极资料的收集) | 宇宙超级无敌霹雳囧死人不偿命纳米技术 | 功能材料——能源材料方向 | 数据处理 |
TiO2 | 文献收录与学术探讨 | 思想波一波 | 物理材料类 |
光催化相关 | 科研文章 | 论道 | 待下载 |
文科类 |
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