Huang Yunpeng, Cui Fen, Zhao Yan, Bao Jian, Lian Jiabiao, Xu Yuanguo, Liu Tianxi, Li Huaming
Institute for Energy Research, Jiangsu University, Zhenjiang, 212013, P.R. China.
School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, 212013, P.R. China.
Chem Asian J. 2017 Sep 19;12(18):2426-2433. doi: 10.1002/asia.201700750. Epub 2017 Aug 15.
Exploring non-precious-metal-based oxygen reduction reaction (ORR) electrocatalysts featuring high efficiency, low cost, and environmental friendliness is of great importance for the broad applications of fuel cells and metal-air batteries. In this work, ultrathin NiCo O nanosheets deposited on 1D SnO nanotubes (SNT) were successfully fabricated through a productive electrospinning technique followed by a sintering and low-temperature coprecipitation strategy. This hierarchically engineered architecture has ultrathin NiCo O nanosheets uniformly and fully erected on both walls of tubular SNTs, which results in improved electrochemical activity as an ORR catalyst, in terms of positive onset potential and high current density, as well as superior tolerance to crossover effects and long-term durability with respect to the commercial Pt/C catalyst. The excellent performance of SNT@NiCo O composites may originate from their rationally designed hierarchical tubular nanostructure with completely exposed active sites and interconnected 1D networks for efficient electron and electrolyte transfer; this makes these composite nanotubes promising candidates to replace platinum-based catalysts for practical fuel cell and metal-air battery applications.
探索具有高效率、低成本和环境友好性的非贵金属基氧还原反应（ORR）电催化剂对于燃料电池和金属空气电池的广泛应用具有重要意义。在这项工作中，通过高效的静电纺丝技术，随后采用烧结和低温共沉淀策略，成功制备了沉积在一维SnO纳米管（SNT）上的超薄NiCoO纳米片。这种分级设计的结构具有超薄的NiCoO纳米片，均匀且完全竖立在管状SNT的两壁上，作为ORR催化剂，在正向起始电位和高电流密度方面具有改善的电化学活性，以及相对于商业Pt/C催化剂对交叉效应的优异耐受性和长期耐久性。SNT@NiCoO复合材料的优异性能可能源于其合理设计的分级管状纳米结构，具有完全暴露的活性位点和相互连接的一维网络，用于高效的电子和电解质传输；这使得这些复合纳米管有望替代铂基催化剂用于实际的燃料电池和金属空气电池应用。
