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摘要
通过溶剂挥发诱导自组装和硫化、磷化处理合成具有多孔结构的CoS2和CoP催化剂,采用X-射线衍射、扫描电子显微镜等表征方法对材料的晶体结构和形貌进行分析。将这2种材料用于析氧反应的催化剂,结果表明,当电流密度达到10 mA/cm2时,2种催化剂均需要较小过电位。CoS2和CoP催化剂相应的塔菲尔曲线显示其斜率值较小,分别为78 mV/dec和77 mV/dec,说明这2种催化剂在析氧催化反应过程中表现出优异的催化性能和很好的析氧反应动力性能。
Abstract
CoS2 and CoP catalysts with porous structure are synthesized via a solvent volatilization-induced self-assembly method followed by sulfurization and phosphorization treatment.X-ray diffraction and scanning electron microscopy are used to analyze the crystal structure and morphology of synthesized catalysts.The catalytic performances of the obtained CoS2 and CoP catalysts are evaluated in oxygen evolution reaction (OER).The results demonstrate that the catalysts exhibit good activity and need a low over-potential when the current density reaches 10 mA·cm-2.The corresponding Tafel curves of CoS2 and CoP show small slope values,78 mV·dec-1 and 77 mV·dec-1,respectively,suggesting the superior catalytic behavior and high OER rates in oxygen evolution process.
关键词
析氧
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催化
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CoP
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CoS2
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全解水
Key words
oxygen evolution
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catalysis
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CoP
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CoS2
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total hydrolysis of water
CoS2和CoP材料的合成及其催化析氧应用[J].
现代化工, 2019, 39(10): 124-127 DOI:10.16606/j.cnki.issn0253-4320.2019.10.027