电极
电解质
催化作用
可逆氢电极
传质
工作电极
二硫化钼
氢
材料科学
化学工程
钯氢电极
标准氢电极
贵金属
相(物质)
纳米技术
化学物理
化学
复合材料
色谱法
物理化学
有机化学
工程类
作者
Jian Cao,Jing Zhou,Ming-Xue Li,Junyu Chen,Yufeng Zhang,Xiaowei Liu
标识
DOI:10.1016/j.cclet.2021.11.007
摘要
Hydrogen evolution reaction (HER) catalytic electrodes under actual working conditions show interesting mass transfer behaviors at solid (electrode)/liquid (electrolyte)/gas (hydrogen) three-phase interfaces. These behaviors are essential for forming a continuous and effective physical contact region between the electrolyte and the electrode and require further detailed understanding. Here, a case study on 1T-2H phase molybdenum disulfide (MoS 2 )/carbon fiber paper (CFP) catalytic electrodes is performed. Rapid gas-liquid mass transfer at the interface for enhancing the working area stability and capillarity for increasing the electrode working area is found. The real scenario, wherein the energy utilization efficiency of the as-prepared non-noble metal catalytic electrode exceeds that of the noble metal catalytic electrode, is disclosed. Specifically, a fluid dynamics model is developed to investigate the behavior mechanism of hydrogen bubbles from generation to desorption on the catalytic electrode surface with different hydrophilic and hydrophobic properties. These new insights and theoretical evidence on the non-negligible three-phase interface behaviors will identify opportunities and motivate future research in high-efficiency, stability, and low-cost HER catalytic electrode development.
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