Nickel–Silicide Colloid Prepared under Mild Conditions as a Versatile Ni Precursor for More Efficient CO₂ Reforming of CH₄ Catalysts

Abstract

Preparing highly active and stable non-noble-metal-based dry reforming catalysts remains a challenge today. In this context, supported nickel nanoparticles with sizes of 1.3 ± 0.2 and 2.1 ± 0.2 nm were synthesized on silica and ceria, respectively, via a two-step colloidal approach. First, 2-nm nickel-silicide colloids were synthesized from Ni(COD)(2) and octylsilane at low temperature; they were subsequently dispersed onto supports prior to reduction under H(2). The resulting catalysts display high activity in dry reforming compared to their analogues prepared using conventional approaches, ceria providing greatly improved catalyst stability.

Effect of NiAl2O4 Formation on Ni/Al2O3 Stability during Dry Reforming of Methane

“…(1)] has become an important research topic over recent years. [1,2] This process uses the greenhouse gases CO 2 and CH 4 to produce the synthesis gas H 2 /CO at al ow ratio of approximately 1:1t hat is as uitable feedstock in the Fischer-Tropsch synthesis.…”

Hollow Fibers Networked with Perovskite Nanoparticles for H2 Production from Heavy Oil

“…With a rising concern for gradual fossil fuel exhaustion, an efficient use of such oil resources is faced to an imperative emerging issue towards hydrogen economy based on sustainable energy generation. Hydrogen-based fuel cells that can be used for both automotive and stationary applications require a stable source of H 2 produced with a high efficiency reforming process1234. The use of pure H 2 as a fuel in automotive and residential applications faces the costly process of distillation and/or hydro-treatment of naphtha.…”

Formal SiH4 chemistry using stable and easy-to-handle surrogates

“…The strategy would be to hydrosilylate, for example, oct-1-ene (4g) with surrogate 2b or 2c with transition-metal catalysis. If such a reaction were compatible with the cyclohexa-2,5-dien-1-yl groups, the Si-H bonds could be 'deprotected' with catalytic amounts of B(C 6 F 5 ) 3 (1a) in a subsequent step to release the trihydrosilane 5g relevant to material sciences [43][44][45][46][47] . As a starting point to illustrate this idea, we treated surrogate 2b with Karstedt's catalyst, tris(1,3-divinyl-1,1,3,3-tetramethyldisiloxane)diplatinum, in the presence of excess 4g and were pleased to obtain hydrosilylation adduct 9 in good yield (Fig.…”