摘要
Myoglobin was immobilized on edge-plane pyrolytic graphite(EPG)electrodes by sodium alginate hydrogel.The protein entrapped in the sodium alginate film undergoes fast direct electron-transfer reactions with the formal potential(Eo′)of-0.296V(vs SCE),corresponding to FeⅢ+e-→FeⅡ,The Eo′s are linearly dependent on solution pH with the slope value of-35.0 mV/pH,indicating that the electron transfer was proton-coupled.The mechanisms for catalytic reduction of oxygen,hydrogen peroxide and nitric oxide by myoglobin entrapped in sodium alginate hydrogel were also explored.
Myoglobin was immobilized on edge-plane pyrolytic graphite(EPG)electrodes by sodium alginate hydrogel.The protein entrapped in the sodium alginate film undergoes fast direct electron-transfer reactions with the formal potential(E^(o′))of-0.296V(vs SCE),corresponding to Fe~Ⅲ+e^-→Fe~Ⅱ,The E^(o′)s are linearly dependent on solution pH with the slope value of-35.0 mV/pH,indicating that the electron transfer was proton-coupled.The mechanisms for catalytic reduction of oxygen,hydrogen peroxide and nitric oxide by myoglobin entrapped in sodium alginate hydrogel were also explored.
出处
《化学研究与应用》
CAS
CSCD
北大核心
2004年第4期530-532,共3页
Chemical Research and Application
关键词
肌红蛋白
海藻酸钠
直接电化学
电催化
Myoglobin
sodium alginate
electrochemistry
eletrocatalysis