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使用金属酸 (CoS2) 微型和纳米结构的高性能电催化

Matthew S Faber¹, Rafal Dziedzic, Mark A Lukowski

¹Department of Chemistry, University of Wisconsin-Madison , 1101 University Avenue, Madison, Wisconsin 53706, United States.

Journal of the American Chemical Society

|June 6, 2014

概括

金属二硫化物 (CoS2) 对的演化具有很高的活性. 将CoS2纳米结构化为纳米线显著提高了用于清洁能源应用的催化性能和稳定性.

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
催化剂是一种催化剂.

背景情况:

开发高效和稳定的地球丰富的电催化剂,用于进化反应 (HER) 是至关重要的.
贵金属催化剂是有效但昂贵的,推动了对替代品的研究.

研究的目的:

研究二硫化物 (CoS2) 作为 HER.的地球上丰富的电催化剂.
探索形态 (薄膜,微线,纳米线) 对CoS2催化性能的影响.
评估纳米结构CoS2在能源转换应用中的潜力.

主要方法:

控制的合成CoS2具有不同的形态 (薄膜,微线,纳米线).
CoS2电极对HER活性和稳定性的电化学表征.
在聚硫化物和三化物还原反应中对CoS2纳米线的评估.

主要成果:

CoS2表现出高的HER活性,纳米线形态表现出卓越的性能.
CoS2纳米线电极在-145 mV超电位下实现了-10 mA cm(-2).
纳米结构改善了操作稳定性,循环性和气泡释放.
对于聚硫化物和三化物减少,观察到增强的电催化活性.

结论:

CoS2的形态控制合成对于优化 HER 电催化是至关重要的.
纳米结构的CoS2为贵金属催化剂提供了一个有希望的,具有成本效益的替代品.
纳米结构策略可以扩展到其他地球上丰富的材料,以改进电催化剂设计.

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