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

作　　者：施秋杰 王吴韬 王成成 段世雄 张呈旭 SHI Qiujie;WANG Wutao;WANG Chengcheng;DUAN Shixiong;ZHANG Chengxu(LuXi KuoBo Precious Metals Co.Ltd.,Honghe 651400,Yunnan,China;Faculty of Metallurgical and Energy Engineering,Kunming Univerisity of Science and Technology,Kunming 650093,China)

机构地区：[1]泸西县扩铂贵金属有限公司,云南红河652400 [2]昆明理工大学冶金与能源工程学院,昆明650093

出　　处：《贵金属》2023年第2期43-49,共7页Precious Metals

基　　金：国家自然科学基金(51864024)。

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IrO_(2)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。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 IrO_(2).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.

关 键 词：电解水 钌基催化剂 聚酞菁 析氧反应 

分 类 号：TK91[动力工程及工程热物理]