Juan Li, Lin Zhang, Xingda An, Kai Feng, Xuchun Wang, Jiari He, Yang Huang, Jingjing Liu, Liang Zhang, Binhang Yan, Chaoran Li, Le He, Tuning Adsorbate-Mediated Strong Metal-Support Interaction by Oxygen Vacancy: A Case Study in...
The as‐quenched samples appear light grey suggesting the presence of abundant surface oxygen vacancies, which are subsequently confirmed by the comprehensive analyses of XRD, XPS and EPR spectra. The oxygen vacancies induced by quenching process are proved to have promoted the light adsorption and ...
摘要: 为了研究TiO2氧空位形成的影响因素,用管式电阻炉在空气、Ar及不同温度下对TiO2烧结.采用扫描电子显微镜(SEM)、X射线衍射(XRD)和X射线光电子能谱(XPS)对烧结TiO2样品的微观形貌、物相组成、元素及价态进行了表征,研究了烧结温度、烧结气氛和Ar+刻蚀对TiO2样品氧空位形成的影响.结果表明:相同气氛下,随着烧结温...
Cu的L边XANES光谱(Figure 2c)和XPS能谱(Figure 2d)表明高度分散在TiO2表面单原子Cu主要以Cu1+形式存在。(3)分子氧和表面晶格氧的双重活化 ▲Figure 3. a: O2-temperature programmed desorption (O2-TPD) profile of Cu1/TiO2 a...
High-performance electrocatalytic conversion of N2 to NH3 using oxygen-vacancy-rich TiO2 in situ grown on Ti3C2T x MXene. Adv Energy Mater, 2019, 9: 1803406 补充材料 图S1 原位红外反应舱装置图 图S2 P0和P500的SEM图, P500的TEM以及能谱图 图S3 P0和P500的TEM以及相应的HRTEM图 图S4 催化剂...
High-performance electrocatalytic conversion of N2 to NH3 using oxygen-vacancy-rich TiO2 in situ grown on Ti3C2T x MXene. Adv Energy Mater, 2019, 9: 1803406 补充材料 图S1 原位红外反应舱装置图 图S2 P0和P500的SEM图, P500的TEM以及能谱图 图S3 P0和P500的TEM以及相应的HRTEM图 图S4 催化剂...
图3为实施例1、比较例2-3制备的催化剂ptniox/tio2-vo、pt/tio2、pt/tio2-vo的xps图。 图4为实施例1、比较例2-3制备的催化剂ptniox/tio2-vo、pt/tio2、pt/tio2-vo的epr图。 图5为实施例1以及比较例1-6制备的催化剂ptniox/tio2-vo、tio2-vo、pt/tio2、pt/tio2-vo、ptfeox/tio2-vo、ptcoox/tio2-vo...
通过改变La2O3含量及焙烧温度,并借助XRD、BET、SEM、TEM、NH3-TPD、H2-TPR及XPS等表征手段,讨论了La2O3-V2O5-WO3/TiO2催化剂结构与NH3-SCR低温性能之间的内在关联。结果发现,La2V6W5/TiO2催化剂活性最佳,以NO转化率90%为标准,其工作窗口温度范围下限低至160 ℃。La2O3的加入提升了催化剂中V4+浓度,改善了...
(SEM). Defects introduced during milling process generatedoxygen vacanciesin the surface and bulk of supports, as evidenced by X-ray Photoelectron Spectroscopy (XPS) and Electron Paramagnetic Resonance (EPR). Furthermore, longer milling time increased reducibility and oxygen mobility of supports, as ...
A novel oxygen vacancy and S-doped heteronanostructured TiO2/Cu2S photocatalyst was obtained by a sequential fabrication from sol-gel route mesoporous Cu doped TiO2 through NaBH4 thermal reduction and hydrothermal sulfuration. The crystalline phase, atomic compositions and morphologies were carefully ...