Rational regulation of oxygen vacancies in high-entropy oxides to balance FeO and FeC phases for catalytic CO hydrogenation to light olefins.

Adjusting surface oxygen vacancies (O) is crucial for oxide catalysts. Doping spinel ZnFeO with elements of different valence states or atomic radio to obtain high-entropy oxides (HEOs) is a common method for creating O. Indeed, the formation of single-phase HEOs and the existence of lattice distortion were confirmed by X-ray diffraction and in-situ Raman, and the concentration of O in HEOs (O = 0.

Highly Dispersed CoO Embedded on Graphitized Ordered Mesoporous Carbon as an Effective Catalyst for Selective Fischer-Tropsch Synthesis of C Hydrocarbons.

Herein, we report the high Fischer-Tropsch synthesis performance of the Co-based catalysts supported on graphitized ordered mesoporous carbon (GMC-900) by using a facile strategy. Compared with CMK-3 and active carbon (AC), the obtained GMC-900 by using pollution-free soybean oil as a carbon source exhibited enhanced catalytic performance after loading Co species due to its highly crystallized graphitic structure and uniform dispersion of CoO. As a result, Co/GMC-900 was an effective catalyst with the maximum C selectivity of 52.

Facile Synthesis of Z-Scheme Ag₃PO₄/Sulfur-Doped g-C₃N₄ Heterojunction Hybrids with Enhanced Visible Light Photocatalytic Performance.

Ag₃PO₄/sulfur-doped g-C₃N₄ heterojunctions were fabricated by the means of a facile calcination and co-precipitation method. Structural characterization suggested that Ag₃PO₄ was successfully loaded onto sulfur-doped g-C₃N₄. The absorption band edges of sulfur-doped g-C₃N₄ were shifted to the longer wavelength in comparison with bulk g-C₃N₄.

Facile urea-assisted precursor pre-treatment to fabricate porous g-CN nanosheets for remarkably enhanced visible-light-driven hydrogen evolution.

Hydrogen generation photocatalyzed by low-cost graphite carbon nitride (g-CN) is a fascinating and effective route to solve energy crisis, but is mainly limited by the few reactive sites, low carrier separation efficiency and mediocre visible-light utilization. In this work, these limitations were tackled through a facile eco-friendly precursor pretreatment by tuning bulk g-CN into porous structure. This pretreatment restricted agglomeration in the subsequent condensation and created more porous channels for charge carrier transfer and more surface active sites for reaction.

Effect of graphitic carbon modification on the catalytic performance of Fe@SiO-GC catalysts for forming lower olefins via Fischer-Tropsch synthesis.

Mesoporous silica-encapsulated iron materials contribute to the suppression of self-aggregation and thereby enhances the Fischer-Tropsch synthesis activity. However, constructing Fe-based supported catalysts with high activity and selectivity in the Fischer-Tropsch synthesis to lower olefins (FTO) by a conventional mesoporous silica support has been proven challenging due to its low hydrothermal stability and low reducibility. Herein, we developed a core-shell Fe@SiO-GC structure with an optimized interface of the catalyst by introducing graphitic carbon (GC) that weakened the Fe-SiO interaction.

Influence of Molecular Weight on Structure and Catalytic Characteristics of Ordered Mesoporous Carbon Derived from Lignin.

Bio-renewable lignin has been used as a carbon source for the preparation of porous carbon materials. Nevertheless, up to now, there are few studies about the influence of molecular weight of lignin on the structure and morphology of the ordered mesoporous carbon. Here, we synthesized the ordered mesoporous carbon derived from different molecular weights of lignin and Pluronic F127.

Uniformity dispersive, anti-coking core@double-shell-structured Co@SiO@C: Effect of graphitic carbon modified interior pore-walls on C selectivity in Fischer-Tropsch synthesis.

Highly dispersed Co nanoparticles with proper interaction with mesoporous support are benefit for the suppression of self-aggregation, which enhances its Fischer-Tropsch synthesis (FTs) activity. However, construct such Co based supported catalysts with high activity and stability in FTs by conventional mesoporous support, especially the common used mesoporous SiO, has proven challenging due to their undesirable hydrothermal stability and poor reducibility. Herein, we developed a unique core@double-shell Co@SiO@C structure with optimized interface of the mesoporous catalyst by introducing graphitic carbon layer which can weaken the interaction between metallic Co and silica.