多金属铁作为微生物燃料电池中氧气还原反应的有希望的催化剂
Gorakhanath S Jadhav1, Arun Kumar Mehta2, Akash Tripathi2
1School of Environmental Science and Engineering, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India.
概括
没有贵金属的三金属化物催化剂显著提高微生物燃料电池 (MFC) 的性能. 这种新的催化剂为氧降解反应提供了与相比具有成本效益的替代品,提高了MFC功率密度.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 可持续能源 可持续能源
背景情况:
- 微生物燃料电池 (MFC) 需要高效的阴极催化剂来进行氧降解反应 (ORR),以便在经济上可行.
- 贵金属催化剂,如金,是有效的,但昂贵,阻碍了广泛的MFC采用.
- 开发具有成本效益的,不含贵金属的催化剂对于推进MFC技术至关重要.
研究的目的:
- 合成和评估一种新的三金属铁 (Co0.5Cu0.5Bi0.1Fe1.9O4) 作为MFC阴极中ORR的无贵金属催化剂.
- 评估合成费里特材料的催化活性和电化学性能.
- 为了比较MFC中的三金属铁催化剂与商业催化剂和赤裸正极的性能.
主要方法:
- 通过sol-gel自燃方法合成三金属酸盐催化剂.
- 使用循环电量计 (CV) 和电化学阻抗光谱 (EIS) 来评估ORR活动的电化学表征.
- 在MFC设置中对催化剂的性能测试,测量功率密度和库伦比效率 (CE).
主要成果:
- 合成的Co0.5Cu0.5Bi0.1Fe1.9O4显示出有效的ORR催化活性.
- 在铁矿结构中浸石改善了减电流和降低了电荷转移阻力.
- 使用三金属化物催化剂的MFC实现了11.44W/m3和21.4%的电源密度,相当于10%的Pt/C (12.14W/m3,23.1%).
结论:
- 三金属酸盐催化剂是用于MFC应用的基于金的催化剂的有希望的,廉价的替代品.
- 与裸体阴极相比,催化剂显著提高了MFC性能 (2.49 W/m3,7.39% CE).
- 这一发展支持了微生物燃料电池大规模,经济高效实施的潜力.
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