Tian Weiliang, Wang Cheng, Chen Ruida, Cai Zhao, Zhou Daojin, Hao Yongchao, Chang Yingna, Han Nana, Li Yaping, Liu Junfeng, Wang Feng, Liu Wen, Duan Haohong, Sun Xiaoming
State Key Laboratory of Chemical Resource Engineering Beijing 100029 P. R. China
Key Laboratory of Chemical Resource Engineering in South Xinjiang, College of Life Science, Tarim University Alar 843300 China.
RSC Adv. 2018 Jul 19;8(46):26004-26010. doi: 10.1039/c8ra03994a.
The fabrication of cost effective and efficient electrocatalysts with functional building blocks to replace noble metal ones is of great importance for energy related applications yet remains a great challenge. Herein, we report the fabrication of a hierarchical structure containing CNTs/graphene/transition-metal hybrids (h-NCNTs/Gr/TM) with excellent bifunctional oxygen electrocatalytic activity. The synthesis was rationally designed by the growth of shorter nitrogen-doped CNTs (S-NCNTs) on longer NCNTs arrays (L-NCNTs), while graphene layers were generated at their interconnecting sites. The hybrid material shows excellent OER and ORR performance, and was also demonstrated to be a highly active bifunctional catalyst for Zn-air batteries, which could be due to rapid electron transport and full exposure of active sites in the hierarchical structure.
制造具有功能构建块以替代贵金属的经济高效的电催化剂对于能源相关应用至关重要，但仍然是一个巨大的挑战。在此，我们报告了一种具有优异双功能氧电催化活性的包含碳纳米管/石墨烯/过渡金属杂化物（h-NCNTs/Gr/TM）的分级结构的制造。通过在较长的氮掺杂碳纳米管阵列（L-NCNTs）上生长较短的氮掺杂碳纳米管（S-NCNTs）来合理设计合成，同时在它们的互连位点生成石墨烯层。该杂化材料表现出优异的析氧反应（OER）和氧还原反应（ORR）性能，并且还被证明是一种用于锌空气电池的高活性双功能催化剂，这可能是由于分级结构中快速的电子传输和活性位点的充分暴露。
