电催化剂
氨生产
氨
弧(几何)
电弧
生产(经济)
材料科学
冶金
环境科学
化学
电极
物理化学
工程类
电化学
经济
机械工程
宏观经济学
有机化学
作者
Xue Liu,Jiawei Zhang,Yi He,Jiamin Huang,Xiaoping Ma,Xiaoman Zhang,Man-Ting Lu,Xin Yu
标识
DOI:10.1088/2058-6272/ad2d10
摘要
Abstract Highly efficient and green ammonia production is an important demand for modern agriculture. In this study, a two-step ammonia production method is developed using a gliding arc discharge in combination with Cu/Cu 2 O electrocatalysis. In this method, NO x is provided by the gliding arc discharge and then electrolyzed by Cu/Cu 2 O after alkaline absorption. The electrical characteristics, the optical characteristics and the NO x production are investigated in discharges at different input voltage and the gas flow. The dependence of ammonia production through Cu/Cu 2 O electrocatalysis on pH value and reduction potential are determined by colorimetric method. In our study, two discharge modes are observed. At high input voltage and low gas flow, the discharge is operated with a stable plasma channel which is called the steady arc gliding discharge mode (A-G mode). As lowering input voltage and raising gas flow, the plasma channel is destroyed and high frequency breakdown occurs instead, which is known as the breakdown gliding discharge mode (B-G mode). The optimal NO x production of 7.34 mmol h −1 is obtained in the transition stage of the two discharge modes. The ammonia yield reaches 0.402 mmol h −1 cm −2 at pH value of 12.7 and reduction potential of −1.0 V versus reversible hydrogen electrode (RHE).
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