Ham, Hyungwon Kim, Jihyeon Cho, Sung June Choi, Joon-Hwan Moon, Dong Ju Bae, Jong Wook 2024-01-20T03:32:35Z 2024-01-20T03:32:35Z 2021-09-05 2016-09 2155-5435 https://pubs.kist.re.kr/handle/201004/123738 A spatial confinement effect of copper nanoparticles in an ordered mesoporous gamma-Al2O3, which is synthesized by an evaporation induced self-assembly (EISA) method, was investigated to verify the enhanced catalytic activity and stability with less aggregation of copper crystallites during direct synthesis of dimethyl ether (DME) from syngas. The surface acidity of the mesoporous Al2O3 and the metallic copper surface area significantly altered catalytic activity and stability. The ordered mesopore structures of Al2O3 were effective to suppress the aggregation of copper nanoparticles even under reductive CO hydrogenation conditions through the spatial confinement effect of the ordered mesopores of Al2O3 as well as the formation of strongly interacted copper nanoparticles with the mesoporous Al2O3 surfaces by partial formation of the interfacial CuAl2O4 species. The aggregation of copper nanoparticles on the bifunctional Cu/meso-Al2O3 having an ordered mesoporous structure was effectively suppressed due to the partial formation of the thermally stable spinel copper aluminate phases, which can further generate new acid sites for dehydration of methanol intermediate to DME. English AMER CHEMICAL SOC SINGLE-STEP SYNTHESIS METHANOL SYNTHESIS HYBRID CATALYSTS SURFACE-AREA DME CU/ZNO/AL2O3 DEHYDRATION PERFORMANCE GAS DEHYDROGENATION Enhanced Stability of Spatially Confined Copper Nanoparticles in an Ordered Mesoporous Alumina for Dimethyl Ether Synthesis from Syngas Article 10.1021/acscatal.6b00882 1 ACS CATALYSIS, v.6, no.9, pp.5629 - 5640 ACS CATALYSIS 6 9 5629 5640 scie scopus 000382714000001 2-s2.0-84984889420 Chemistry, Physical Chemistry Article SINGLE-STEP SYNTHESIS METHANOL SYNTHESIS HYBRID CATALYSTS SURFACE-AREA DME CU/ZNO/AL2O3 DEHYDRATION PERFORMANCE GAS DEHYDROGENATION dimethyl ether (DME) ordered mesoporous Al2O3 copper nanoparticle spatial confinement effect syngas copper aluminate bifunctional catalyst