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.

研究了3d过渡金属前体的影响，以制备用于酸性电解质中氧还原反应（ORR）的非贵金属催化剂（MTETA / C）。所有这些3d过渡金属前体均与三亚乙基四胺（TETA）螯合并负载在BP 2000上，然后在Ar的存在下于800°C进行热解。催化剂通过X射线衍射（XRD），X射线光电子能谱（XPS）和电化学技术在结构和催化活性方面进行表征。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具有明显的影响，这可能与XPS表示的碳表面上的N原子和O物种有关。这里，金属氯化物有利于制备这些用于酸性电解质中ORR的催化剂。此外，碳表面上的吡啶二氮和吡咯氮分别促进了这些铁基和钴基催化剂上氧的还原。