In situ ammonium formation mediates efficient hydrogen production from natural seawater splitting
点击次数：
发表刊物：Nat. Commun.
摘要：Seawater electrolysis using renewable electricity offers an attractive route to sustainable hydrogen production, but the sluggish electrode kinetics and poor durability are two major challenges. We report a molybdenum nitride (Mo2N) catalyst for the hydrogen evolution reaction with activity comparable to commercial platinum on carbon (Pt/C) catalyst in natural seawater. The catalyst operates more than 1000 hours of continuous testing at 100 mA cm−2 without egradation, whereas massive precipitate (mainly magnesium hydroxide) forms on the Pt/C counterpart after 36 hours of operation at 10 mA cm−2. Our investigation reveals that ammonium groups generate in situ at the catalyst surface, which not only improve the connectivity of hydrogenbond networks but also suppress the local pH increase, enabling the enhanced performances. Moreover, a zero-gap membrane flow electrolyser assembled by this catalyst exhibits a current density of 1 A cm−2 at 1.87 V and 60 oC in simulated seawater and runs steadily over 900 hours.
备注：Xiao-Long Zhang†, Peng-Cheng Yu†, Shu-Ping Sun†, Lei Shi, Peng-Peng Yang, Zhi-Zheng Wu, Li-Ping Chi, Ya-Rong Zheng,* , and Min-Rui Gao*
论文类型：期刊论文
卷号：15
页面范围：9462
是否译文：否
发表时间：2024-11-01