Non-precious metal cathodes for anion exchange membrane fuel cells from ball-milled iron and nitrogen doped carbide-derived carbons

RENEWABLE ENERGY

卷:167

Article

Ratso, Sander¹  Zitolo, Andrea²  Kaarik, Maike¹  Merisalu, Maido³  Kikas, Arvo³  Kisand, Vambola³  Rahn, Mihkel³  Paiste, Paarn⁴  Leis, Jaan¹  Sammelselg, Vaino³  Holdcroft, Steven⁵  Jaouen, Frederic⁶  Tammeveski, Kaido¹ 

[1] Univ Tartu, Inst Chem, Ravila 14a, EE-50411 Tartu, Estonia

[2] Synchrotron SOLEIL, BP 48 St Aubin, F-91192 Gif Sur Yvette, France

[3] Univ Tartu, Inst Phys, W Ostwald Str 1, EE-50411 Tartu, Estonia

[4] Univ Tartu, Inst Ecol & Earth Sci, Vanemuise 46, EE-51014 Tartu, Estonia

[5] Simon Fraser Univ, Dept Chem, 8888 Univ Dr, Burnaby, BC V5A 1S6, Canada

[6] Univ Montpellier, CNRS, ENSCM, ICGM, Montpellier, France

关键词: Oxygen reduction;    Electrocatalysis;    Carbide-derived carbon;    Fe-N-x site;    Ball-milling;    Anion exchange membrane fuel cell;   

DOI  :  10.1016/j.renene.2020.11.154

来源: Elsevier

【 摘 要 】

Iron and nitrogen doping of carbon materials is one of the promising pathways towards replacing Pt/C in polymer electrolyte fuel cell cathodes. Here, we show a synthesis method to produce highly active non-precious metal catalysts and study the effect of synthesis parameters on the oxygen reduction reaction (ORR) activity in high-pH conditions. The electrocatalysts are prepared by functionalizing silicon carbide-derived carbon (SiCDC) with 1,10-phenanthroline, iron(II)acetate and, optionally polyvinylpyrrolidone, by ball-milling with ZrO2 in dry or wet conditions, followed by pyrolysis at 800 degrees C. The catalysts are characterized by scanning and transmission electron microscopy, X-ray photoelectron spectroscopy, X-ray absorption spectroscopy, N-2 physisorption and inductively coupled plasma mass spectrometry. By optimizing the ball-milling conditions, we achieved a reduction in the size of SiCDC grains from >1 mu m to 200 nm without negatively affecting the high BET area of catalysts derived from SiCDC. This resulted in increased ORR activity in both rotating disk electrode and anion exchange membrane fuel cell (AEMFC) environments, and improved mass-transport properties of the cathode layer in fuel cell. The ORR activity at 0.9 V in AEMFC of the optimized iron and nitrogen-doped SiCDC reaches 52 mA cm(-2), exceeding that of a Pt/C cathode at 36.5 mA cm(-2). (c) 2020 Elsevier Ltd. All rights reserved.

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