Showing papers in "Catalysis Today in 2016"

TL;DR: In this paper, the authors evaluated the stability and activity of iridium and ruthenium thin film electrodes in acidic and alkaline electrolytes using an electrochemical scanning flow cell (SFC) connected to an inductively coupled plasma mass spectrometer (ICP-MS).

TL;DR: In this article, a review examines recent progress on the VOCs catalytic oxidation with noble metal and metal oxides catalysts, and the engineering features of regenerative catalytic oxidizer (RCO), recuperative COO, photocatalytic oxidizers (PCO), and hybrid treatment combining adsorptive concentration/ozonation/plasma with COO.

TL;DR: In this article, the authors demonstrate that the activity and selectivity of copper during the CO2 electrochemical reduction can be tuned by changing the concentration of the bicarbonate electrolyte.

TL;DR: In this article, the pH dependence of the OER activity is measured using a reference electrode such as the reversible hydrogen electrode, which assures that the overpotential is fixed while varying the pH.

TL;DR: In this article, the current state-of-the-art of unconventional heterogeneous catalysts with a focus on activity and product selectivity is discussed, and various emerging approaches to enhance the yield of specific products and the overall rate of reaction are addressed.

TL;DR: In this paper, Ni-CeO2 was determined to be the most active catalytic catalyst for CO and CO2 methanation, which increased with increasing surface area of CeO2.

TL;DR: In this paper, the synthesis of silver-zinc oxide (Ag-ZnO) nanostructures with a plant extract-mediated hydrothermal method was investigated, where the eco-friendly plant extract Azadirachta indica (Neem) was used as a reducing agent.

TL;DR: Nickel nanoparticles supported on Ce 1-x Zr x O 2 mixed oxides prepared by different synthesis methods, as well as Ni-ZrO 2 and Ni-CeO 2, were evaluated for their catalytic performance in methane dry reforming (MDR) as discussed by the authors.

TL;DR: There has been growing interest in the research and development of hierarchical zeolites possessing at least two levels of porosity in order to reduce diffusion limitations in reactions catalyzed by microporous zeolite.

TL;DR: Methods of direct characterization of activity and stability of immobilized enzymes as heterogeneous biocatalysts are described and their important roles in promoting rationalBiocatalyst design as well as optimization and control of heterogeneously catalyzed processes are emphasized.

TL;DR: In this paper, exchanged Cu sites, the major active sites in Cu/SSZ-13, were characterized using DRIFTS, and their unique responses to hydrothermal aging and sulfur poisoning were revealed.

TL;DR: In this article, the potential for these two technologies to work together to enable low-cost PEM electrolysis systems is described, and the authors also describe the use of reactive spray deposition (RSDT) for fuel cell electrodes with good performance.

TL;DR: In this article, a combined experimental-computational study of the electroreduction of acetaldehyde to ethanol on copper was performed, and the results indicated that during the late stages of CO/CO 2 reduction to C 2 species on copper, ethanol formation has higher energetic barriers than ethylene formation, and hence the selectivity is inclined toward the latter.

TL;DR: In this paper, a carbon-based solid acid catalyst was prepared via hydrothermal method using glucose as carbon precursors and aqueous solution of H2SO4 as sulfonation agent.

TL;DR: In this paper, a group of by-products were identified and degradation paths were elucidated for photolysis and photocatalysis for antibiotic ciprofloxacin.

TL;DR: In this paper, the effect of the coating suspension composition on the properties of catalytic coatings, as well as how CO2 conversion, methane selectivity and catalyst stability are affected by the architecture of the structured catalyst.

TL;DR: In this article, the performance of Ni-based catalysts supported on γ-Al2O3 modified by La 2O3 and CeO2 promoters was investigated for ethanol steam-reforming reaction.

TL;DR: In this article, a lamellar and pillared ZSM-5 materials modified with Mg and Zn oxides were synthesized and tested for in-situ catalytic upgrading of eucalyptus woodchips fast-pyrolysis vapors.

TL;DR: In this article, the authors investigated hydrogenation and deoxygenation of phenol over nickel nano-particles of different sizes supported on SiO2 in a batch reactor at 275°C and 100 bar.

TL;DR: In this paper, the size-dependent change in the surface site composition for Fischer-Tropsch (FT) nanocrystals was investigated, showing that the defect/step sites increased in concentration with increasing size, with the B5-A site and the B6 site reaching a stable value at about 4nm.

TL;DR: In this paper, the impact of catalyst acidity on the selectivity of upgraded biomass pyrolysis products was studied by passing pine pyrolyssis vapors over five ZSM-5 catalysts of varying acidity at 500°C.

TL;DR: In this paper, a series of noble metal promoted Ni/γ-Al 2 O 3 catalysts, prepared by the co-impregnation method, were used for carbon dioxide methanation in a plug flow reactor.

TL;DR: In this paper, a co-impregnation of ZSM-5 with Fe and Cu by chemical vapour impregnation yielded catalysts that showed high selectivity to methanol (>92% selectivity, 0.5% conversion), as the only product in the liquid phase.

TL;DR: In this paper, the effects of support chemical composition and reaction temperature on the amount, reactivity (towards H2 and O2) and relative contribution of CH4 and CO2 activation routes towards carbon formation were investigated.

TL;DR: In this article, the effect of process conditions (H2/CO feed ratio, reaction temperature and pressure), syngas conversion, and catalyst composition and activation procedure on the water-gas-shift (WGS) activity was investigated.

TL;DR: In this article, a brief review of the literature on fast hydropyrolysis of biomass is presented, describing previous findings, current challenges, and research opportunities for the future.

TL;DR: In this article, Nanoporous graphitic carbon nitride (npg-C 3 N 4 ) was used to couple with CdS quantum dots (QDs) by a simple deposition method to further increase the photocatalytic activities of photocatalyst.

TL;DR: In this paper, the performances of representative Co-based and Fe-based Fischer-Tropsch catalysts have been comparatively investigated in the hydrogenation of CO and CO2, with methane largely dominating the product distribution in the case of CO2 hydrogenation and long-chain hydrocarbons dominating the products pool during CO hydrogenation.

TL;DR: In this paper, the impact of process variables on selectivity to C5+ products during cobalt Fischer-Tropsch synthesis is summarized and discussed, comprising temperature, pressure, synthesis gas composition, transport limitations of synthesis gas and products; conversion of CO; and effect of water.

TL;DR: In this article, a microwave-assisted solvothermal method was used to construct hierarchical architectures with high visible-light photocatalytic activity, which can be used in catalysis, separation technology, solar cell, biomedical engineering, and nanotechnology.