通过程序升温还原技术研究了非等温还原条件下 IrO2 和 TiO2（锐钛矿）之间的相互作用。 根据高分辨率透射电子显微镜 (HRTEM) 测定，IrO2 簇的尺寸在 0.5 至 0.9 nm 之间。

2025年3月30日 · The H 2-TPR experiments were performed using a Micromeritics Autochem 2950 instrument (Micromeritics, Atlanta, GA, USA). 50.0 mg of each catalyst was loaded into a quartz U-tube reactor, embedded between two layers of quartz wool to ensure uniform heat and mass transfer through the catalyst bed. The samples were degassed in argon by heating to ...

2023年1月31日 · The interaction between IrO2 and TiO2 (anatase) in non-isothermal reduction conditions has been studied by the temperature programmed reduction technique. IrO2 clusters are of sizes between 0.5 and 0.9 nm as determined from High Resolution Transmission Electron Microscopy (HRTEM).

2007年6月30日 · The reduction of various iron oxides in hydrogen and carbon monoxide atmospheres has been investigated by temperature programmed reduction (TPR H2 and TPR CO), thermo-gravimetric and differential temperature analysis (TG-DTA-MS), and conventional and “in situ” XRD methods.

IrO2 clusters are of sizes between 0.5 and 0.9 nm as determined from High Resolution Transmission Electron Microscopy (HRTEM). Largely, two main regions for reduction were found and modeled at ca...

2022年6月1日 · XPS and CO–TPR of the Ir/Al 2 O 3 catalysts showed that the oxygen supply capacity of IrO 2 clusters is related to the nanoparticle size. The stability of Ir–O bonds could be enhanced by strong charge transfer in small IrO 2 clusters, which only occurs on the surface layer of large IrO 2 clusters.

2003年4月17日 · The present study gives TPR results of different heating rate, and shows the good agreement of the TPR simulation results compared with experiment data. The objective of this investigation was to gain a more systematic understanding of the reducibility of iron oxide.

IrO2 clusters are of sizes between 0.5 and 0.9 nm as determined from High Resolution Transmission Electron Microscopy (HRTEM). Largely, two main regions for reduction were found and modeled at...

2019年1月31日 · We investigated the adsorption and oxidation of H 2 on O-rich IrO 2 (110) using temperature programmed reaction spectroscopy (TPRS) and density functional theory (DFT) calculations.

The first region is attributed to the partial reduction of IrO2 clusters, while the second one is due to reduction of the formed crystalline (rutile IrO2), during TPR, to Ir metal. Two...