化学
覆盖层
歧化
催化作用
卤化物
氧气
卤素
海水
析氧
卤水
氢
过氧化氢
无机化学
分解水
有机化学
物理化学
光催化
烷基
电化学
地质学
海洋学
电极
作者
Thomas P. Keane,Samuel S. Veroneau,Alaina C. Hartnett,Daniel G. Nocera
摘要
Whereas the emphasis of water splitting is typically on hydrogen generation, there is value in the oxygen produced, especially in the undersea environment and for medicinal applications in the developing world. The generation of pure and breathable oxygen from abundant and accessible sources of water, such as brine and seawater, is challenging owing to the prevalence of the competing halide oxidation reaction to produce halogen and hypohalous acids. We show here that pure O2 may be generated from briny water by using an oxygen evolution catalyst with an overlayer that fulfills the criteria of (i) possessing a point of zero charge that results in halide anion rejection and (ii) promoting the disproportionation of hypohalous acids.
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