期刊
RSC ADVANCES
卷 12, 期 15, 页码 9304-9309出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2ra01337a
关键词
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资金
- JSPS KAKENHI [JP20K14647, JP21H01858, JP21H01974]
- Research Institute of Green Science and Technology Fund for Research Project Support National University Corporation Shizuoka University [2020-RIGST-21E02]
This study presents the first experimental evidence of direct H-2 production from seawater using multiphoton ionization water splitting with a femtosecond pulse laser, without harmful gas emissions. The H-2 production rate in seawater was 3.3 times higher compared to ultrapure water. The study also observed ion enhancement in seawater, but excessive salt can have adverse effects.
This study presents the first experimental evidence of direct H-2 production from seawater without harmful gas emissions (e.g., CO2, Cl-2), which uses multiphoton ionization water splitting with a femtosecond pulse laser. According to H-2 analysis using a gas chromatograph, the H-2 production rate in seawater was 70 mu mol h(-1), which was approximately 3.3 times more than the ultrapure water case reported in the literature. This positive effect derives from focusing through the cuvette wall and the more significant Kerr effect in seawater. Such ion enhancement was observed in the case of seawater and diluted seawater compared with the ultrapure water case, but excessive salt can lead to ion suppression and adverse effects. These differences in salinity suggest appearances of nonlinear optical effects near the focal point and ionization of metallic elements with low ionization potential and are discussed in relation to results of bubble visualization, gas composition analysis, and pressure measurement in gaseous products.
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