Alkaline characteristics of MgO reduces support's acidity and improves active metal-support interaction, as evaluated by NH3-TPD and H2-TPR. Hydrogenation of nitriles is considered to be an...

Various concentrations (0.01, 0.03 and 0.05 wt ratios) of graphene oxide (GO) nanosheets were doped into magnesium oxide (MgO) nanostructures using chemical precipitation technique. The objective...

2015年11月1日 · The H2-TPR profile of NiO/MgO catalyst is the quite complex. The reduction of NiO starts at 200°C but is still not completed at 950°C, the end temperature for H2-TPR tests. The low temperature reduction peaks at 250–550°C may be attributed to NiO species which exists in a free state on the surface of MgO, whereas the high ...

H2-TPR profiles of the commercial MgO, pure (thin line) and loaded with 1% Au wt (thicker line) by DIM. [...] Au was loaded (1 wt%) on a commercial MgO support by three different methods:...

The reducibility of magnesia-supported nickel catalysts and NiO–MgO physical mixture has been studied by the temperature-programmed reduction (TPR) technique in the temperature range 373–1273 K. The influences of calcination temperature (673–1273 K), treatment time (1–48 h) and Ni loading (2.8–18 wt %) on NiO reduc

2003年9月15日 · Thermal programmed reduction (TPR) profiles were recorded on a Micromeritics TPD/TPR 2900 analyser equipped with a thermal conductivity detector. The experimental protocol was as follows: an amount of solid between 150 and 300 mg at 25 °C was subjected to a temperature ramp of 10 °C min −1 up to 600 °C while a stream containing 10.6% of ...

本文制备了一系列Pt/xMo-MgO、Pt/xZr-MgO、Pt/xCe-MgO催化剂，在固定床反应器中通入模拟烟气，考察了不同催化剂种类对NOx催化性能的影响规律，进而运用XRD、BET、SEM、TEM …

2024年2月8日 · For the Ni-containing samples, structure analysis (refinement of the occupancy factor) revealed that Ni 2+ partially replaces Mg 2+ in the MgO structure, resulting in a Mg 1–x Ni x O solid solution as already suggested by the H 2-TPR results .

2009年2月18日 · These catalysts were investigated in CO 2 reforming of methane under atmospheric pressure and characterized with XRD, TPR and H 2 -TPD techniques.

透射电子显微镜和 H2 化学吸附分析表明，当催化剂中添加 MgO 时，ZnO 上存在高度分散的 Ni 纳米颗粒，平均尺寸为 5.7 nm。 TPR 和 EXAFS 分析证明了强烈的 Ni-ZnO 相互作用。