Ouyang Ling, Zhou Qiang, Liang Jie, Zhang Longcheng, Yue Luchao, Li Zerong, Li Jun, Luo Yongsong, Liu Qian, Li Na, Tang Bo, Ali Alshehri Abdulmohsen, Gong Feng, Sun Xuping
Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan 610054, China.
Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing, Jiangsu 211189, China.
J Colloid Interface Sci. 2022 Jun 15;616:261-267. doi: 10.1016/j.jcis.2022.02.074. Epub 2022 Feb 19.
Electrocatalytic NO reduction is a promising technology for ambient NO removal with simultaneous production of highly value-added NH. Herein, we report that honeycomb carbon nanofiber coated on carbon paper acts as an efficient metal-free catalyst for ambient electroreduction of NO to NH. In 0.2 M NaSO solution, such catalyst achieves an NH yield of 22.35 μmol h cm with a high Faradaic efficiency of up to 88.33%. Impressively, it also shows excellent stability for 10-h continuous electrolysis. Theoretical calculations reveal that the most active center of functional groups is -OH group for NO reduction with a low energy barrier (ΔG of 0.29 eV) for the potential-determining step (*NO + H → *HNO).
电催化还原一氧化氮是一种很有前景的技术，可用于去除环境中的一氧化氮，同时生产高附加值的氨。在此，我们报道了涂覆在碳纸上的蜂窝状碳纳米纤维可作为一种高效的无金属催化剂，用于将环境中的一氧化氮电还原为氨。在0.2 M硫酸钠溶液中，这种催化剂实现了22.35 μmol h⁻¹ cm⁻²的氨产率，法拉第效率高达88.33%。令人印象深刻的是，它在10小时的连续电解中也表现出优异的稳定性。理论计算表明，官能团中最活跃的中心是用于还原一氧化氮的 -OH基团，其电位决定步骤（*NO + H → *HNO）的能垒较低（ΔG为0.29 eV）。
