Influence of metal precursors on the catalytic activity and structure of non-precious metal electrocatalysts for oxygen reduction reaction
Influence of metal precursors on the catalytic activity and structure of non-precious metal electrocatalysts for oxygen reduction reaction
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金属前驱体对非贵金属氧还原电催化剂催化活性和结构的影响
DOI：
10.1016/j.ijhydene.2012.03.049
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发表时间：
2012-09
影响因子：
7.2
通讯作者：
Ma Zifeng
中科院分区：
文献类型：
--
作者：
Zhang Huijuan;Kong Haichuan;Yuan Xianxia;Jiang Qizhong;Yang Junhe;Ma Zifeng
研究了3d过渡金属前驱体对制备非贵金属催化剂（MTETA/C）在酸性电解质中氧还原反应（ORR）的影响。所有这些3d过渡金属前体与三亚乙基四胺（TETA）螯合并负载在BP 2000上，然后在Ar存在下在800 °C下热解。采用X射线衍射（XRD）、X射线光电子能谱（XPS）和电化学技术对催化剂的结构和催化活性进行了表征。这些非贵金属催化剂的电催化活性的变化表明，金属前体对催化活性有明显的影响，这可能与XPS表明碳表面的N原子和O物种有关。在酸性电解质中，金属氯化物有利于制备这些用于ORR的催化剂。此外，吡啶N和吡咯N在碳表面上促进这些铁基和钴基催化剂上的氧还原，分别。
The influence of 3d transition metal precursors has been studied to prepare non-precious metal catalysts (MTETA/C) for the oxygen reduction reaction (ORR) in acid electrolyte. All these 3d transition metal precursors are chelated with triethylenetetramine (TETA) and supported on BP 2000, then pyrolyzed at 800 °C in the presence of Ar. The catalysts are characterized in terms of structure and catalytic activity by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and electrochemical techniques. Variations of the electrocatalytic activity of these non-precious metal catalysts indicate that the metal precursors have obvious effects on the catalytic activity and this may be related to the N atoms and O species on the carbon surface indicated by XPS. Here, metal chloride is beneficial to prepare these catalysts for the ORR in acidic electrolyte. Furthermore, pyridinic N and pyrrolic N on the carbon surface facilitate the reduction of oxygen on these Fe-based and Co-based catalysts, respectively.
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