Seawater usable for production and consumption of hydrogen peroxide as a solar fuel.
Seawater usable for production and consumption of hydrogen peroxide as a solar fuel.
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DOI：
10.1038/ncomms11470
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发表时间：
2016-05-04
影响因子：
16.6
通讯作者：
Fukuzumi S
中科院分区：
文献类型：
--
作者：
Mase K;Yoneda M;Yamada Y;Fukuzumi S
水中的过氧化氢（H2O2）由于易于储存和高能量密度的优点，已经被提议作为有前景的太阳能燃料代替气态氢，用作单室H2O2燃料电池的燃料，用于在仅排放分子氧（O2）和水的情况下按需产生电力。在H2O2作为太阳能燃料的实际应用中，非常希望利用地球上最丰富的海水而不是珍贵的纯水。在这里，我们已经实现了高效的光催化生产H2O2从地球上最丰富的海水，而不是珍贵的纯水和O2在两室光电化学电池使用WO3作为光催化剂的水氧化和钴络合物支持在玻璃碳基板上的选择性双电子还原O2。在海水中产生的H2O2的浓度达到48 mM，这高到足以使H2O2燃料电池工作。 利用可靠和可获得的技术从可再生能源中产生和储存能源是一个重大和日益令人关切的问题。在这里，作者证明了太阳能从海水中产生过氧化氢是实现这一重要目标的可行途径。
Hydrogen peroxide (H2O2) in water has been proposed as a promising solar fuel instead of gaseous hydrogen because of advantages on easy storage and high energy density, being used as a fuel of a one-compartment H2O2 fuel cell for producing electricity on demand with emitting only dioxygen (O2) and water. It is highly desired to utilize the most earth-abundant seawater instead of precious pure water for the practical use of H2O2 as a solar fuel. Here we have achieved efficient photocatalytic production of H2O2 from the most earth-abundant seawater instead of precious pure water and O2 in a two-compartment photoelectrochemical cell using WO3 as a photocatalyst for water oxidation and a cobalt complex supported on a glassy-carbon substrate for the selective two-electron reduction of O2. The concentration of H2O2 produced in seawater reached 48 mM, which was high enough to operate an H2O2 fuel cell. The generation and storage of energy from renewable sources with robust and accessible technology is of significant and growing concern. Here, the authors demonstrate the solar generation of hydrogen peroxide from seawater as a viable route towards this important goal.