摘要
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 reaches0.402 mmol h^(-1)cm^(-2)at pH value of 12.7 and reduction potential of-1.0 V versus reversible hydrogen electrode(RHE).
作者
刘学
张佳伟
何弈
黄嘉敏
马晓萍
张潇漫
卢曼婷
辛煜
Xue LIU;Jiawei ZHANG;Yi HE;Jiamin HUANG;Xiaoping MA;Xiaoman ZHANG;Manting LU;Yu XIN(Jiangsu Key Laboratory of Thin Films,School of Physical Science and Technology,Soochow University,Suzhou 215006,People’s Republic of China;Jiangsu Key Laboratory of Advanced Negative Carbon Technologies,Soochow University,Suzhou 215123,People’s Republic of China)
