Ambient Electroreduction of Nitrite to Ammonia over Ni Nanoparticle Supported on Molasses-Derived Carbon Sheets

作者：Xun He, Xiuhong Li, Xiaoya Fan, Jun Li, Donglin Zhao, Longcheng Zhang, Shengjun Sun, Yongsong Luo, Dongdong Zheng, Lisi Xie, Abdullah M. Asiri, Qian Liu, Xuping Sun · 发表于：ACS Applied Nano Materials · 年份：2022 · DOI：10.1021/acsanm.2c03720 · 被引用次数：93 · 研究领域：Ammonia Synthesis and Nitrogen Reduction、Caching and Content Delivery、Advanced Photocatalysis Techniques

Electrochemical nitrite (NO 2 – ) reduction is a promising approach for ambient ammonia (NH 3 ) synthesis and simultaneous mitigation of NO 2 – contaminant in wastewater. Herein, we report Ni nanoparticle supported on molasses-derived carbon sheets (Ni@MDC) as an earth-abundant electrocatalyst for NO 2 – -to-NH 3 conversion. When tested in alkaline solutions with 0.1 M NO 2 –, such Ni@MDC obtains a high NH 3 yield of 6.3 mg h –1 mg cat –1 with a Faradaic efficiency of 65.4% at −0.8 V versus reversible hydrogen electrode under ambient conditions. Furthermore, it shows remarkable electrochemical stability during long-term electrolysis and cycling tests.