期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 37, 期 17, 页码 13219-13226出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2012.03.049
关键词
Non-precious metal catalysts; Oxygen reduction reaction; Metal precursors; Triethylenetetramine (TETA) chelate; Fe and Co
资金
- National Natural Science Foundation of China [50901086, 51072118, 21176155]
- Shanghai Rising Star Program [10QA1405000]
- Shanghai Shuguang Project [09SG46]
- STCSM of China [10JC1406900]
- China Postdoctoral Science Foundation [20100480593]
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 degrees 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 0 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. Copyright (C) 2012, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
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