Bimetallic Nickel-Cobalt catalysts and their application in dry reforming reaction of methane

Abstract

Dry reforming of methane (DRM) reaction provides a novel direction for fossil raw materials through a superior ratio of hydrogen and carbon monoxide. The evaluation of NiCo catalysts mightily depends on the raw materials and processes for preparation. Here, we briefly look at the correlation between the component properties and catalytic performances, the effect of preparation methods, and the mechanism of NiCo catalysts. Active components like metals ratio and the formation of alloy have an important influence on the close connection between metals. The support properties are exhibited with different situations, including physical and chemical mutual effect. Acid-base property, redox property and metal-support interaction play an important role in the chemical interaction of catalysts. However, the deactivation due to the carbon deposition and bimetallic sintering still remains a large challenge for the deployment of NiCo catalysts. The promoters have been reported especially help with these disadvantages of pure bimetallic catalysts. They are conducive to more stable activation and dispersion of metals. In addition to the above, we then move on to consider numerous preparation methods incorporating the conventional and special ones to explore the efficacy of preparing technology. The last section describes the reaction mechanisms of catalyst surface, inside with density functional theory, micro-kinetic modeling and in-situ representation. These five parts have significant implications for mass production that optimize DRM reaction yields and simultaneously saving cost. In this paper, we present a critical assessment for the relevant development and remaining limitations of NiCo bimetallic catalysts. It is hoped to not only shed light upon the development of high-performance industrial DRM catalysts, but also contribute an innovative perspective to understand anti-coking mechanism and even producing syngas.