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1Phosphorus-doping activates carbon nanotubes for efficient electroreduction of nitrogen to ammonia显示文摘The electrochemical nitrogen reduction reaction(NRR)as an energy-efficient approach for ammonia synthesis is hampered by the low ammonia yield and ambiguous reaction mechanism.Herein,phosphorus-doped carbon nanotube(P-CNTs)is developed as an efficient metal-free electrocatalyst for NRR with a remarkable NH3 yield of 24.4μg·h^−1·mg^−1cat.and partial current density of 0.61 mA·cm^−2.Such superior activity is found to be from P doping and highly conjugated CNTs substrate.Experimental and theoretical investigations discover that the electron-deficient phosphorus sites with Lewis acidity should be genuine active sites and NRR on P-CNTs follows the distal pathway.These findings provide insightful understanding on NRR processes on P-CNTs,opening up opportunities for the rational design of highly-active cost-effective metal-free catalysts for electrochemical ammonia synthesis.Lu-Pan Yuan Ze-Yuan Wu Wen-Jie Jiang Tang Tang Shuai Niu Jin-Song Hu 2020Nano Research2020,13,5:3
2Advances of CNT-based systems in thermal management显示文摘Effective thermal management has become extremely urgent for electronics due to the massive heat originated from the ever-rising power density.With the merits of high thermal conductivity,good chemical stability and desirable mechanical properties,carbon nanotubes(CNTs)are considered to have great potential to be widely used in heat dissipation devices.This article describes the progress on thermal conductivity of CNT-reinforced composites,aligned CNT materials(aligned CNT arrays,films/buckypapers and fibers)as high thermal conductors,experimental and theoretical results of CNT-substrate interface resistance,and utilizations of CNTs in the passive heat dissipation(natural convection,heat radiation,and phase-change heat transfer).Finally,the challenges and prospects are discussed to provide some hints in the future studies.It is believed that CNTs can play an important role in thermal management of electronics,especially in the portable electronic devices.Wei Yu Changhong Liu Shoushan Fan 2021Nano Research2021,14,8:1
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