Keane Thomas P, Nocera Daniel G
Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts 02138, United States.
ACS Omega. 2019 Jul 30;4(7):12860-12864. doi: 10.1021/acsomega.9b01751. eCollection 2019 Jul 31.
Although the emphasis of water splitting is typically on hydrogen generation, there is a value in the oxygen byproduct especially for life support in field operations. For such applications, the production of a pure, unadulterated oxygen stream is highly desired under environmental conditions. Here, we demonstrate that self-healing oxygen evolution catalysts composed of cobalt or nickel are capable of selectively producing oxygen from both 0.5 M NaCl solutions and seawater. Differential electrochemical mass spectrometry demonstrates the absence of halogen in the product stream, and chemical analysis shows the production of only minute amounts of hypohalous acid.
虽然水分解的重点通常在于制氢，但氧副产品也有价值，特别是在野外作业的生命保障方面。对于此类应用，在环境条件下非常需要生产出纯净、未掺杂的氧气流。在此，我们证明由钴或镍组成的自修复析氧催化剂能够从0.5M氯化钠溶液和海水中选择性地产生氧气。差分电化学质谱表明产物流中不存在卤素，化学分析显示仅产生微量的次卤酸。
