Gliding arc discharge in combination with Cu/Cu_(2)O electrocatalysis for ammonia production  

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)

机构地区：[1]Jiangsu Key Laboratory of Thin Films,School of Physical Science and Technology,Soochow University,Suzhou 215006,People’s Republic of China [2]Jiangsu Key Laboratory of Advanced Negative Carbon Technologies,Soochow University,Suzhou 215123,People’s Republic of China

出　　处：《Plasma Science and Technology》2024年第7期67-73,共7页等离子体科学和技术（英文版）

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).

关 键 词：gliding arc discharge nitrogen fixation Cu/Cu_(2)O catalyst electrocatalytic reduction of nitrite 

分 类 号：F42[经济管理—产业经济]