EDTA-derived Co-N-C and Fe-N-C electro-catalysts for the oxygen reduction reaction in acid environment

被引:40
|
作者
Lo Vecchio, Carmelo [1 ]
Arico, Antonino Salvatore [1 ]
Monforte, Giuseppe [1 ]
Baglio, Vincenzo [1 ]
机构
[1] Ist Tecnol Avanzate Energia Nicola Giordano ITAE, CNR, Via Salita Santa Lucia Contesse 5, I-98126 Messina, Italy
关键词
Non precious metal catalysts; ORR; Methanol tolerance; CoNC; FeNC; EDTA; METHANOL FUEL-CELLS; METAL-ORGANIC FRAMEWORKS; DOPED CARBON; MESOPOROUS CARBON; PERFORMANCE ANALYSIS; ALKALINE MEDIA; AIR ELECTRODES; NITROGEN; ELECTROCATALYSTS; TOLERANCE;
D O I
10.1016/j.renene.2017.12.084
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Here, in-house Co-N - and Fe-N-C have been prepared by, first, chelating the metals (Co or Fe) with ethylene diamine tetra acetic acid, known as EDTA (nitrogen precursor). UV-Visible (UV-Vis) spectrometry has been used to ensure the chelated metal formation. In the next step, the chelated metals have been deposited on a high surface area oxidized carbon support to increase the electrical conductivity. The latter composite material has been thermally treated at 800 degrees C (CoNC8 and FeNC8) or 1000 degrees C (CoNC10 and FeNC10) in nitrogen atmosphere in order to create the catalytic sites that will be able to perform the oxygen reduction reaction (ORR) in the acid medium. Electrochemical tests have been carried out to investigate the activity and durability of the electro-catalysts for the ORR. Methanol tolerance properties have been also evaluated for a possible application in direct methanol fuel cells. It appears that FeNC8 is the most active electrocatalyst in the presence of methanol in the base electrolyte, thus showing promising characteristics for direct methanol fuel cells. Instead, stability tests of these metal nitrogen catalysts indicate the best resistance to corrosion for the catalysts treated at 1000 degrees C. (C) 2017 Elsevier Ltd. All rights reserved.
引用
收藏
页码:342 / 349
页数:8
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