Yichuan Guo, Zizhen Gong, Hang Yu, Guihua Liu, Zisheng Zhang, Changcheng Wu, Jingde Li
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引用次数: 0
摘要
高效的电催化剂是水电解过程中析氧反应(OER)的关键。本文提出了一种简单、低成本的方法,将ni纳米线阵列与NiFe纳米片组装在柔性碳布(CC)载体上,作为高效的OER催化剂。这种独特的“纳米片纳米线”结构设计增加了其比表面积,使其能够接触到更多的活性位点。所得NiFe@H-CoNi/CC催化剂表现出优异的OER活性(过电位为280 mV,过电位为100 mA cm−2),Tafel斜率为36 mV dec−1,并且在高电流操作条件下具有出色的耐久性(100 mA cm−2下超过100小时)。此外,原位拉曼分析表明NiOOH是真实的OER活性相。这种“纳米片纳米线”的设计为制造高性能和持久的OER催化剂提供了一种方法。
Layer-structured NiFe nanosheets on CoNi nanowires for enhanced oxygen evolution reaction
Efficient electrocatalysts are critical for the oxygen evolution reaction (OER) that occurs during water electrolysis. Herein, a simple and low-cost strategy of assembling CoNi nanowire arrays with NiFe nanosheets on flexible carbon cloth (CC) support as an efficient OER catalyst is developed. This unique ‘nanosheets on nanowires’ structure design increases its specific surface area, enabling access to more active sites. The resulting NiFe@H-CoNi/CC catalyst exhibits excellent OER activity (280 mV overpotential at 100 mA cm−2) with a Tafel slope of 36 mV dec−1 and also has outstanding durability at high current operation conditions (over 100 h at 100 mA cm−2). Moreover, in-situ Raman analysis suggests that the NiOOH is the realistic OER active phase. This ‘nanosheet on nanowire’ design gives a means for fabricating OER catalysts that are both high-performance and long-lasting.
期刊介绍:
Nano Futures mission is to reflect the diverse and multidisciplinary field of nanoscience and nanotechnology that now brings together researchers from across physics, chemistry, biomedicine, materials science, engineering and industry.