New Platinum Alloy Catalysts for Oxygen Electroreduction Based on Alkaline Earth Metals

Vej-Hansen U. G.; Escudero-Escribano M.; Velazquez-Palenzuela A.; Malacrida P.; Rossmeisl J.; Stephens I. E. L.; Chorkendorff I.; Schiotz J.

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New Platinum Alloy Catalysts for Oxygen Electroreduction Based on Alkaline Earth Metals

机译：基于碱土金属的氧气电气新的铂合金催化剂

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The energy efficiency of polymer electrolyte membrane fuel cells is mainly limited by overpotentials related to the oxygen reduction reaction (ORR). In this paper, we present new platinum alloys which are active for the ORR and based on alloying Pt with very abundant elements, such as Ca. Theoretical calculations suggested that Pt5Ca and Pt5Sr should be active for the ORR. Electrochemical measurements show that the activity of sputter-cleaned polycrystalline Pt5Ca and Pt5Sr electrodes is enhanced by a factor of 5-7 relative to polycrystalline Pt. Accelerated stability testing shows that after 10,000 electrochemical cycles, the alloys still retain over half their activity. The stability is thus not quite on par with the similar Pt-lanthanide alloys, possibly due to the somewhat lower heat of formation.

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来源
《Electrocatalysis》 |2017年第6期|共11页
作者
Vej-Hansen U. G.; Escudero-Escribano M.; Velazquez-Palenzuela A.; Malacrida P.; Rossmeisl J.; Stephens I. E. L.; Chorkendorff I.; Schiotz J.;
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作者单位

Tech Univ Denmark Dept Phys DK-2800 Lyngby Denmark;

Tech Univ Denmark Dept Phys DK-2800 Lyngby Denmark;

Tech Univ Denmark Dept Phys DK-2800 Lyngby Denmark;

Tech Univ Denmark Dept Phys DK-2800 Lyngby Denmark;

Tech Univ Denmark Dept Phys DK-2800 Lyngby Denmark;

Tech Univ Denmark Dept Phys DK-2800 Lyngby Denmark;

Tech Univ Denmark Dept Phys DK-2800 Lyngby Denmark;

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原文格式 PDF
正文语种 eng
中图分类化学动力学、催化作用;
关键词
Oxygen reduction reaction; Platinum alloys; Alkaline earths;

机译：氧还原反应;铂合金;碱土;

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6. New Platinum Alloy Catalysts for Oxygen Electroreduction Based on Alkaline Earth Metals [J] . Vej-Hansen U. G., Escudero-Escribano M., Velazquez-Palenzuela A., Electrocatalysis . 2017,第6期

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7. Platinum supported on alkaline and alkaline earth metal-doped alumina as catalysts for dry reforming and partial oxidation of methane [J] . A. Ballarini, F. Basile, P. Benito Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications . 2012,第Null期

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13. Heat-Treated Polyacrylonitrile-Based Catalysts for Oxygen Electroreduction. (Reannouncement with New Availability Information). [R] . Gupta, S., Tryk, D., Bae, I., 1989

机译：热处理聚丙烯腈基氧气还原催化剂。（重新公布新的可用性信息）。

New Platinum Alloy Catalysts for Oxygen Electroreduction Based on Alkaline Earth Metals

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