氧降解电催化剂基于强度合的氧化物纳米晶体和碳纳米管
Yongye Liang1, Hailiang Wang, Peng Diao
1Department of Chemistry, Stanford University , Stanford, California 94305, United States.
Journal of the American Chemical Society
|September 11, 2012
概括
一种新的氧化物/碳纳米管混合催化剂为氧降解反应 (ORR) 提供了高效率. 这种耐用,低成本的催化剂显示出可再生能源和-电解的前景.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 纳米技术纳米技术
背景情况:
- 氧降解反应 (ORR) 对可再生能源技术至关重要.
- 开发具有成本效益,高活性和耐用的ORR催化剂仍然是一个重大挑战.
- 现有的催化剂通常在性能和稳定性方面面临限制.
研究的目的:
- 合成一种新的氧化物/碳纳米管 (CNT) 混合物,作为一种高效的ORR催化剂.
- 为了研究合成材料的催化活性和耐久性.
- 探索其在-电解的氧去极化阴极中的潜在应用.
主要方法:
- 一种两步合成,涉及氧化物纳米晶体在氧化多壁CNT上直接生长.
- 在NH(3) 中的气相回火形成氧化物 (CoO).
- 介绍了COO/混合CNT (NCNT) 混合物的ORR性能和稳定性的特征.
主要成果:
- 这种CoO/NCNT混合体表现出高ORR电流密度,性能优于C03) O04) /石墨烯和商业Pt/C.
- 催化剂主要使用4电子还原路径.
- 与石墨烯对应物相比,金属氧化物/纳米管混合体表现出优越的活性位点和电荷传输.
- 这种CoO/NCNT混合体在80°C的10M NaOH中表现出极好的活性和稳定性.
结论:
- 强烈合的无机/纳米碳混合物代表了一个有希望的ORR催化剂的新类.
- CoO/NCNT混合型为ORR应用提供了具有成本效益和耐用性的替代方案.
- 这种催化剂系统有可能用于用于-电解的氧去极化阴极.
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