过电位
双功能
分解水
析氧
电极
层状双氢氧化物
材料科学
可逆氢电极
化学工程
无机化学
化学
工作电极
光催化
电化学
催化作用
有机化学
氢氧化物
物理化学
工程类
作者
Chunhui Zhang,Chao Teng,Shuqin Guo,Yue Sun,Cunming Yu,Jinkai Xu,Kesong Liu,Lei Jiang
出处
期刊:Nano Letters
[American Chemical Society]
日期:2024-01-31
卷期号:24 (6): 1959-1966
标识
DOI:10.1021/acs.nanolett.3c04379
摘要
Overall water splitting, as a critical approach to producing green hydrogen, is greatly impeded by the mass transfer of gaseous bubbles and dissolved gas molecules. Herein, a bifunctional superaerophilic/superaerophobic (SAL/SAB) NiFe layered-double-hydroxides (LDHs) electrode has been developed, which can drive H2 and O2 bubbles out of the reaction system by asymmetric Laplace pressure and accelerate dissolved gases diffusion through reducing their diffusion distance. Consequently, the SAL/SAB NiFe-LDHs electrode exhibits excellent HER activity with an overpotential of -76 mV at -10 mA cm-2 and outstanding oxygen evolution reaction activity with an overpotential of 253 mV at 100 mA cm-2. The bifunctional SAL/SAB NiFe-LDHs electrode is further utilized in overall water splitting, which can achieve 10 mA cm-2 with a cell voltage of 1.54 V. This work provides an efficient strategy to improve the efficiency of overall water splitting and can stimulate new electrode design in various gas-involved processes.
科研通智能强力驱动
Strongly Powered by AbleSci AI