TiO2纳米管电极上电化学还原CO2生成CH3OH

裘建平,童怡雯,赵德明,何志桥,陈建孟,宋爽

Electrochemical Reduction of CO2 to Methanol at TiO2 Nanotube Electrodes

Jian-Ping QIU,Yi-Wen TONG,De-Ming ZHAO,Zhi-Qiao HE,Jian-Meng CHEN,Shuang SONG

表1 TiO2NTs电极的物理特性及其在电解电位为−0.56 V时的电催化活性

Table 1 Summary of physicochemical parameter of various TiO2NTs electrodes at a potential of −0.56 V.

Sample Crystalline phas Content of Ti 2p/% Content of O 1s/% Roughness factor/ (cm2·cm?2) Faradaic efficiency/% Partial current density/(mA·cm?2) Ti(Ⅲ) Ti(Ⅳ) O* Ti-O-Ti H-O-H CH3OH CO HCOOH HCHC CH3OH CO HCOOH HCHO TiO2NTs-450 anatase 33.7 66.3 33 66 1 875.3 85.8 7.2 4.5 2.1 0.2 0.017 0.011 0.004 TiO2NTs-550 anatase/rutile 16.6 83.4 16.5 82.2 1.3 723.7 78.6 5.2 2.5 1.05 0.16 0.01 0.005 0.002 TiO2NTs-650 rutile 10.9 89.1 13.6 84.3 2.1 540.3 72.2 2.7 2 0.92 0.1 0.004 0.003 0.001