表面氧缺陷以传统的浸渍法,在不同焙烧温度下制备了用于CO氧化反应的Co3O4/SiO2催化剂.通过激光拉曼光谱(Raman),X射线光电子能谱(XPS),X射线衍射(XRD),程序升温还原(TPR)和X射线吸收精细结构谱(XAFS)表征了该系列催化剂的结构.存所有的催化剂中,XRD和Raman光谱都只检测到了Co3O4晶相的存在.与Co3O4体相相比...
通过对XPS和XAFS结果的分析可知,Ni物种的价态接近+2价,主要通过Ni-O键锚定在Ni-Co3O4纳米片上,且其配位模式与Co3O4中的Co四面体位点(+2价和4配位)相近。 图5.Li-O2电池中不同阴极的电催化性能评价。(a)基于不同正极电池...
Catalysts were then characterized by BET, XRD, TEM, XPS, H2-TPR and XAFS methods. The effects of preparation methods on the textural and chemical properties of Pd/Co3O4, such as the mesoporous structure, Pd species dispersion, oxidation-reduction properties, were discussed and subsequently ...
H. Geometrical-site-dependent catalytic activity of ordered mesoporous Co-based spinel for benzene oxidation: In situ DRIFTS study coupled with Raman and XAFS spectroscopy. ACS Catal. 2017, 7, 1626–1636. Article CAS Google Scholar Yang, K.; Liu, Y. X.; Deng, J. G.; Zhao, X. T.;...
The structures of materials underwent assessments via X-ray absorption fine structure (XAFS). Fourier transforms (FT) of the Ru K-edge EXAFS spectra unveil two prominent peaks at 1.5 Å and 2.5 Å for Ru-Co3O4, attributed to Ru-O and Ru-O-Ru/Co coordinations, respectively (Fig...
The structures of materials underwent assessments via X-ray absorption fine structure (XAFS). Fourier transforms (FT) of the Ru K-edge EXAFS spectra unveil two prominent peaks at 1.5 Å and 2.5 Å for Ru-Co3O4, attributed to Ru-O and Ru-O-Ru/Co coordinations, respectively (Fig...
The nitrate (NO3−) electroreduction into ammonia (NH3) represents a promising approach for sustainable NH3 synthesis. However, the variation of adsorption configurations renders great difficulties in the simultaneous optimization of binding energy for
X射线吸收精细结构(XAFS)结果表明,具有合适原子间Co-Co距离(ca. 2.80Å)的双核Co-Co位点可通过双位点机制促进O-O键的形成。Co 9 S 8 的金属性显示出与其独特的Co-Co键连续网络结构相关的高电导率,有利于改善OER过程中的快速电荷转移。 要点2. Co-Co DASs/ZCC电极在10 mA cm -2 下仅提供155 mV的优异...
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The nitrate (NO3−) electroreduction into ammonia (NH3) represents a promising approach for sustainable NH3 synthesis. However, the variation of adsorption configurations renders great difficulties in the simultaneous optimization of binding energy for