论文类型：Research Article
第一作者：Shi,Hao
通讯作者：Wang,Tanyuan,Li,Qing
合写作者：Elbaz,Lior,Huang,Yunhui,Su,Dong,Wang,Chao,Cai,Zhao,Xuan,Shuxia,Liang,Jiashun,Li,Shenzhou,Chen,Weiwei,Liu,]Jianyun
发表刊物：Nature Communications
所属单位：华中科技大学
刊物所在地：英国
文献类型：Article
卷号：14
期号：1
页面范围：3934
ISSN号：2041-1723
关键字：Hydrogen Evolution; Water; Energy; Catalyst; Oxygen
DOI码：10.1038/s41467-023-39681-1
发表时间：2023-07-06
影响因子：14.7
摘要：Hydrogen produced from neutral seawater electrolysis faces many challenges including high energy consumption, the corrosion/side reactions caused by Cl-, and the blockage of active sites by Ca2+/Mg2+ precipitates. Herein, we design a pH-asymmetric electrolyzer with a Na+ exchange membrane for direct seawater electrolysis, which can simultaneously prevent Cl- corrosion and Ca2+/Mg2+ precipitation and harvest the chemical potentials between the different electrolytes to reduce the required voltage. In-situ Raman spectroscopy and density functional theory calculations reveal that water dissociation can be promoted with a catalyst based on atomically dispersed Pt anchored to Ni-Fe-P nanowires with a reduced energy barrier (by 0.26 eV), thus accelerating the hydrogen evolution kinetics in seawater. Consequently, the asymmetric electrolyzer exhibits current densities of 10 mA cm−2 and 100 mA cm−2 at voltages of 1.31 V and 1.46 V, respectively. It can also reach 400 mA cm−2 at a low voltage of 1.66 V at 80 °C, corresponding to the electricity cost of US$1.36 per kg of H2 ($0.031/kW h for the electricity bill), lower than the United States Department of Energy 2025 target (US$1.4 per kg of H2).