X射线光电子能谱
光催化
二氧化钛
扫描电子显微镜
材料科学
循环伏安法
介电谱
计时安培法
锐钛矿
分析化学(期刊)
催化作用
核化学
无机化学
化学
化学工程
电化学
电极
冶金
色谱法
复合材料
物理化学
工程类
生物化学
作者
Aykut Çağlar,Nahit Aktaş,Hilal Kıvrak
出处
期刊:ACS applied energy materials
[American Chemical Society]
日期:2021-10-26
卷期号:4 (11): 12298-12309
被引量:9
标识
DOI:10.1021/acsaem.1c02121
摘要
In this study, titanium dioxide (TiO2)-supported Cd catalysts were prepared at 0.05–3% of Cd loading by employing the incipient wetness impregnation method. These catalysts were characterized via X-ray diffraction (XRD), scanning electron microscopy–energy-dispersive X-ray (SEM–EDX), high-angle annular dark-field scanning transmission electron microscopy and TEM–EDS mapping, inductively coupled plasma–mass spectrometry (ICP–MS), X-ray photoelectron spectroscopy (XPS), temperature-programmed reduction (TPR), temperature-programmed oxidation (TPO), and temperature-programmed desorption (TPD). XRD and TEM analysis showed that TiO2 exhibited an anatase structure. SEM–EDX and mapping, XPS, TPR, TPO, and TPD analysis revealed that the Cd addition to TiO2 altered the electronic structure and surface properties of TiO2. Photocatalytic electro-oxidation measurements were conducted to define the glucose electro-oxidation activity, stability, and resistance of catalysts with cyclic voltammetry, chronoamperometry (CA), and electrochemical impedance spectroscopy (EIS) in 1 M KOH + 0.5 M glucose solution at 100 mV/s in the dark and under UV illumination. 0.1% Cd/TiO2 catalyst showed the best photocatalytic glucose electro-oxidation activity with a 6 mA/cm2 specific activity compared to the dark (0.89 mA/cm2). CA and EIS measurements indicated that 0.1% Cd/TiO2 catalyst exhibited the highest stability and the lowest resistance. In conclusion, Cd-doped TiO2 is a promising catalyst for photocatalytic fuel cells.
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