摘要
高活性、低成本的高效双功能水分解电催化剂对实现可持续氢能源的有效转化和储存具有重要的意义.将不锈钢网进行盐酸腐蚀、浸泡、磷化得到一种一体化自支撑的双功能电催化剂.该催化剂在碱性介质中不论对析氢反应(Hydrogen Evolution Reaction,HER)还是析氧反应(Oxyogen Evolution Reaction,OER)均表现出优异的电催化性能,Tafel斜率分别为87.41 mV·dec^-1和90.1 mV·dec^-1,析氢反应和析氧反应的电流密度为10 mA·cm^-2时过电位分别为165 mV和240 mV.该催化剂可用作全分解水的双功能电极材料,在1.66 V的电压下实现10 mA·cm^-2的电流密度.
To rationally design the best bifunctional water decomposition electrocatalyst with low cost and high activity is significant for achieving efficient conversion and storage of sustainable energy.An improved self-supporting stainless steel mesh electrocatalyst is obtained by the steps of corrosion,immersion and phosphating.The electrochemically modified stainless steel electrocatalyst exhibited excellent electrocatalytic performance for both hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)in alkaline medium,displaying Tafel slope of 87.41 mV·dec^-1 and 90.1 mV·dec^-1,respectively.At current density of 10 mA·cm^-2,the electrochemically modified stainless steel mesh electrocatalyst exhibited low overpotential of 164 mV and 240 mV,allowing it to be used as bifunctional electrocatalyst for overall water splitting with enhanced overall voltage of 1.66 V at10 mA·cm^-2.
作者
李玉平
韦晶晶
熊图治
Balogun Muhammad-Sadeeq
LI Yuping;WEI Jingjing;XIONG Tuzhi;Balogun Muhammad-Sadeeq(College of Materials Science and Engineering,Hunan University,Changsha 410082,China)
出处
《湖南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2020年第8期133-140,共8页
Journal of Hunan University:Natural Sciences
基金
国家自然科学基金资助项目(21875292)。
关键词
双功能电催化剂
不锈钢网
析氢反应
析氧反应
全分解水
bifunctional electrocatalyst
stainless steel mesh(SSM)
hydrogen evolution reaction(HER)
oxygen evolution reaction(OER)
water splitting
