Mesoporous NiCu–CeO2 oxide catalysts for high-temperature water–gas shift reaction
作者： Ajay Jha , Dae-Woon Jeong , Won-Jun Jang , Chandrashekhar V. Rode , Hyun-Seog Roh
DOI: 10.1039/C4RA13142H
关键词: Inorganic chemistry 、 Space velocity 、 Mesoporous organosilica 、 Oxide 、 Mesoporous material 、 Adsorption 、 Water-gas shift reaction 、 Materials science 、 Bimetallic strip 、 Catalysis
摘要: Mesoporous NiCu–CeO2 oxide catalysts were synthesized by using the evaporation-induced self-assembly method applied to high-temperature, water–gas shift reaction (HT-WGS) between 350 550 °C. Nickel and copper loadings on mesoporous ceria tailored achieve high activity selectivity suppressing methane formation in HT-WGS. Among prepared catalysts, NiCu(1 : 4)–CeO2 exhibited highest CO2 H2 with 85% CO conversion at a very GHSV of 83 665 h−1. The higher was due architecture, which provides more accessible active sites for WGS reaction. Powder X-ray diffraction (XRD), small angle scattering (SAXS), N2-adsorption/desorption isotherm, high-resolution transmission electron microscopy (HR-TEM), H2-temperature-programmed reduction (TPR) techniques used understand role mesoporosity bimetallic composition various oxides enhancing catalytic
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