Water Gas Shift Catalysis

Atomic structure and stability of magnetite Fe3O4(001): An X-ray view

“…It is involved in the catalysis of the water-gas shift reaction [1], in Fischer-Tropsch synthesis [2], and it also raised some interest due to its possible application for groundwater remediation [3] and in spintronic devices [4]. Since these applications depend on the surface structure of the material, a correct description is fundamental for a deeper understanding of the processes involved.…”

“…Ultimately, our results confirm the recently proposed SCV model of the reconstructed surface. In addition to the clean surface, the evolution of the surface structure in a water vapor rich environment is important because magnetite is used as a catalyst for the water-gas shift reaction [1]. Water adsorption on magnetite (001) has been studied previously at varying pressure ranges by STM [14], LEED I-V [15], XPS [16,17], and using DFT+U calculations [15,17,18].…”

Unique redox properties in defective CeO2-x nanocrystallines synthesized by laser melting

“…The generation/elimination of oxygen vacancies, together with the corresponding alteration of valence state of Ce, leads to the widely-recognized oxygen storage capacity (OSC) that makes CeO 2 a highlight in catalysis research [1][2][3][4], and applications like photocatalysis and solid oxide fuel cells that significantly rely on the amount and mobility/ diffusion of carriers, such as light absorption and band structure, while the generation of defects can be beneficial by inducing more carriers [5][6][7][8][9]. Thus, tailoring composition and morphology of pure and doped ceria has been a highlight in catalyst and electrolyte research [10][11][12].…”

Co on Fe3O4(001): Towards precise control of surface properties

“…6 One particular mixed oxide, CoFe 2 O 4 , has the highest magnetocrystalline anisotropy of all iron-containing spinels. 7 The applications of Co-Fe spinel oxides span from permanent magnets, 8 and a) juan.delafiguera@iqfr.csic.es spintronic devices, 9-13 through catalysis [14][15][16][17][18][19] to electrochemistry where they are proposed as high-performance anodes in Li-batteries. [20][21][22] The catalytic properties of specific oxides stem partially from the particular arrangement of Fe and Co cations at the surface under the given operation conditions.…”