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| 钌基双金属聚酞菁电催化析氧性能研究 |
| Study on performance of electrocatalytic oxygen evolution over Ru-based bimetallic polyphthalocyanine |
| 投稿时间：2022-08-11 |
| DOI： |
| 中文关键词: 电解水 钌基催化剂 聚酞菁 析氧反应 |
| 英文关键词: water electrolysis Ru-based catalysts polyphthalocyanine oxygen evolution reaction |
| 基金项目:国家自然科学基金(51864024) |
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| 摘要点击次数: 473 |
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| 中文摘要: |
| 电解水制氢阳极电催化析氧反应(OER)动力学缓慢，可采用阳极OER催化剂提高。采用简单的低温热解法制备出钌(Ru)、铁钌(FeRu)和钴钌(CoRu)复合聚酞菁等一系列催化剂，通过X射线粉末衍射仪(XRD)、扫描电子显微镜(SEM)、X射线光电子能谱(XPS)对催化剂的形貌和结构进行表征，并采用电化学工作站对催化剂的析氧等电催化性能进行测试。测试结果表明，催化剂Fe3Ru-PPc在碱性环境下电流密度为50 mA.cm-2时的过电位为303.5 mV，塔菲尔斜率仅为42.3 mV.dec-1，相比于商业IrO2具有更好的OER活性。对其结构分析可知，Fe与Ru的结合使得材料的电子结构发生变化，促进了OER的动力学过程，从而使其具有更好的OER活性和载流子迁移率。 |
| 英文摘要: |
| The electrocatalytic oxygen evolution reaction (OER) at the anode for hydrogen production from water electrolysis is kinetically slow and can be enhanced by using anode OER catalysts. A series of catalysts, Ru-PPc, FeRu-PPc and CoRu-PPc, were prepared by a simple low-temperature pyrolysis method. The morphology and structure of the catalysts were characterized by X-ray powder diffractometer (XRD), scanning electron microscope (SEM), and X-ray photoelectron spectroscopy (XPS). The electrocatalytic performances were tested by electrochemical workstation. The results show that an over potential of 303.5 mV and a Tafel slope of only 42.3 mV.dec-1 at a current density of 50 mA.cm-2 were obtained via using Fe3Ru-PPc as a catalysis, superior over commercial IrO2. This better OER activity can be attributed to a change in electronic structure between Fe and Ru. This change will promote the kinetic process of the OER reaction, resulting in better OER reactivity and carrier mobility. |
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