CO₂ hydrogenation over heterogeneous catalysts at atmospheric pressure: from electronic properties to product selectivity

Abstract

The fundamental insights into the relationships among the electronic properties of active metals, the binding strengths of key intermediates, and the CO2 hydrogenation selectivity are provided.

Boosting the performance of Ni/Al2O3 for the reverse water gas shift reaction through formation of CuNi nanoalloys

“…The incorporation of a second metal is an effective way to tune the electronic properties of the active sites and several promoters have been proposed as an alternative to enhance the selectivity to carbon monoxide of Ni-based catalysts [24][25][26] . Indeed, the benefits of bimetallic catalysts for the rWGS reaction are mostly related to higher metal dispersions, enhanced CO 2 activation and improved CO desorption [27][28][29] . Hence, one of the most promising alternatives is the use of Cu, due to its inherent high selectivity to carbon monoxide 30,31 .…”

Alternative Clinker Technologies for Reducing Carbon Emissions in Cement Industry: A Critical Review

“…It should be pointed out that the full melting of the mixture may facilitate the electrification of the process through plasma or electrical arc melting, which may lead to a scenario where the effluent gas stream is solely fed by the CO 2 generated by the calcination of the raw meal. Such a highly CO 2 concentrated gas stream could potentially be combined with green H 2 to produce methanol and other hydrocarbons [ 62 , 63 ].…”

Structural effect of Ni/TiO2 on CO methanation: improved activity and enhanced stability

“…It has been used to remove trace CO for the production of ammonia and fuel cells. The investigation of CO methanation is also fundamentally important for CO 2 methanation since CO 2 methanation may take the pathway of CO methanation via the dissociation of carbon dioxide to CO. 3 A good CO 2 methanation catalyst should rstly have excellent activity in CO methanation if it takes the CO methanation pathway. 4,5 With increasing concerns regarding CO 2 utilization in the emission control of greenhouse gases, storage of renewable hydrogen and in life cycle systems in space stations, the study of CO methanation is now even more important.…”

“…4,5 With increasing concerns regarding CO 2 utilization in the emission control of greenhouse gases, storage of renewable hydrogen and in life cycle systems in space stations, the study of CO methanation is now even more important. [3][4][5][6] Due to their relatively high activity and relatively low price, oxide-supported Ni catalysts have been extensively applied for CO 2 reforming of methane, 7,8 methane decomposition, 9 and CO 1,2,[10][11][12] and CO 2 methanation. [3][4][5][6] However, carbon formation and sintering cause the deactivation of Ni catalysts for CO methanation.…”

“…[3][4][5][6] Due to their relatively high activity and relatively low price, oxide-supported Ni catalysts have been extensively applied for CO 2 reforming of methane, 7,8 methane decomposition, 9 and CO 1,2,[10][11][12] and CO 2 methanation. [3][4][5][6] However, carbon formation and sintering cause the deactivation of Ni catalysts for CO methanation. 13,14 In addition, the low-temperature activity of the supported Ni catalysts for CO methanation still needs to be improved.…”