Abstract
Mesoporous NiCu-CeO2 oxide catalysts were synthesized by using the evaporation-induced self-assembly method applied to the high-temperature, water-gas shift reaction (HT-WGS) between 350 to 550 °C. Nickel and copper loadings on mesoporous ceria were tailored to achieve high activity and selectivity by suppressing methane formation in HT-WGS. Among the prepared catalysts, NiCu(1 : 4)-CeO2 exhibited the highest selectivity to CO2 and H2 with 85% CO conversion at a very high GHSV of 83 665 h-1. The higher activity of the catalysts was due to the mesoporous architecture, which provides more accessible active sites for the WGS reaction. Powder X-ray diffraction (XRD), small angle X-ray scattering (SAXS), N2-adsorption/desorption isotherm, high-resolution transmission electron microscopy (HR-TEM), and H2-temperature-programmed reduction (TPR) techniques were used to understand the role of mesoporosity and bimetallic composition of various NiCu-CeO2 oxides in enhancing catalytic activity for HT-WGS.
| Original language | English |
|---|---|
| Pages (from-to) | 1430-1437 |
| Number of pages | 8 |
| Journal | RSC Advances |
| Volume | 5 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2015 |
Bibliographical note
Publisher Copyright:© The Royal Society of Chemistry 2015.
All Science Journal Classification (ASJC) codes
- Chemistry(all)
- Chemical Engineering(all)