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Currently, cobalt and related catalysts are very attractive as they provide many advantages, such as low cost and high activity, in a variety of applications. Cobalt catalysts are among the most active catalysts for Fischer–Tropsch synthesis and they promote the catalytic activity of the hydrodesulfurization catalysts. They also found other significant applications in environmental protection such as oxidation of volatile organic compounds, VOC, persulfate activator, ammonia synthesis, electrocatalysis and many more. Cobalt catalysts are active, stable and exhibit significant oxidation–reduction activity, as the Co can be found either as Co(II) or Co(III). Additionally, many molecules can interact with the cobalt supported phase by co-ordination due to partially filled d-orbital. Co-catalysts can be supported in almost all the inorganic supports such as alumina, titania, zeolites, etc. The cobalt oxide phase can be stabilized on the surface of the support due to variable interactions between the support and cobalt phase. These interactions are crucial for catalytic activity and can be regulated by proper selection of the preparation parameters such as the type of support, the Co loading, impregnation method and thermal conditions.This Special Issue aims to cover recent progress and advances in the field of cobalt and related catalysts.

Technology: general issues --- electrocatalyst --- oxygen reduction reaction --- Al-air battery --- biomass --- nitrogen-doped carbon --- halloysite --- hierarchical materials --- p-xylene oxidation --- terephthalic acid --- cobalt catalyst --- titania --- diffuse reflectance spectroscopy --- sulfamethaxazole --- persulfates --- point of zero charge --- Co-ZSM-5 --- UV-Vis diffuse reflection spectroscopy --- FTIR spectroscopy --- pyridine adsorption --- CO adsorption --- Fischer-Tropsch synthesis --- bimetallic catalyst --- cobalt-nickel alloys --- TPR-XANES/EXAFS --- superstructures --- bicontinuous microemulsion --- oxygen evolution reaction --- metal-metal oxides --- electrocatalyst --- oxygen reduction reaction --- Al-air battery --- biomass --- nitrogen-doped carbon --- halloysite --- hierarchical materials --- p-xylene oxidation --- terephthalic acid --- cobalt catalyst --- titania --- diffuse reflectance spectroscopy --- sulfamethaxazole --- persulfates --- point of zero charge --- Co-ZSM-5 --- UV-Vis diffuse reflection spectroscopy --- FTIR spectroscopy --- pyridine adsorption --- CO adsorption --- Fischer-Tropsch synthesis --- bimetallic catalyst --- cobalt-nickel alloys --- TPR-XANES/EXAFS --- superstructures --- bicontinuous microemulsion --- oxygen evolution reaction --- metal-metal oxides

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This Special Issue is related to studies of the hydrogen production from formic acid decomposition. It is based on five research papers and two reviews. The reviews discuss the liquid phase formic acid decomposition over bimetallic (PdAg), molecular (Ru, Ir, Fe, Co), and heterogenized molecular catalysts. The gas-phase reaction is studied over highly dispersed Pd, Pt, Au, Cu, and Ni supported catalysts. It is shown that the nature of the catalyst’s support plays an important role for the reaction. Thus, N-doping of the carbon support provides a significant promotional effect. One of the reasons for the high activity of the N-doped catalysts is the formation of single-atom active sites stabilized by pyridinic N species present in the support. It is demonstrated that carbon materials can be N-doped in different ways. It can be performed either directly from N-containing compounds during the carbon synthesis or by a post-synthetic deposition of N-containing compounds on the carbon support with known properties. The Issue could be useful for specialists in catalysis and nanomaterials as well as for graduate students studying chemistry and chemical engineering. The reported results can be applied for development of catalysts for the hydrogen production from different liquid organic hydrogen carriers.

Technology: general issues --- formic acid decomposition --- hydrogen production --- CuO-CeO2/γ-Al2O3 --- multifuel processor --- copper catalyst --- oxygenates --- fuel cell --- Pd/C --- melamine --- g-C3N4 --- bipyridine --- phenanthroline --- N-doped carbon --- hydrogen --- formic acid --- platinum --- nitrogen doped --- carbon nanotubes --- carbon nanofibers --- heterogeneous catalysts --- bimetallic nanoparticles --- PdAg --- AgPd --- alloy --- nickel catalyst --- porous carbon support --- nitrogen doping --- hydrogen energetics --- hydrogen carrier --- formic acid dehydrogenation --- supported gold catalysts --- formic --- formate --- hybrid --- functionalization --- co-catalyst --- additive --- amine --- molecular catalyst --- nanocatalyst --- nano co-catalyst

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This Special Issue is related to studies of the hydrogen production from formic acid decomposition. It is based on five research papers and two reviews. The reviews discuss the liquid phase formic acid decomposition over bimetallic (PdAg), molecular (Ru, Ir, Fe, Co), and heterogenized molecular catalysts. The gas-phase reaction is studied over highly dispersed Pd, Pt, Au, Cu, and Ni supported catalysts. It is shown that the nature of the catalyst’s support plays an important role for the reaction. Thus, N-doping of the carbon support provides a significant promotional effect. One of the reasons for the high activity of the N-doped catalysts is the formation of single-atom active sites stabilized by pyridinic N species present in the support. It is demonstrated that carbon materials can be N-doped in different ways. It can be performed either directly from N-containing compounds during the carbon synthesis or by a post-synthetic deposition of N-containing compounds on the carbon support with known properties. The Issue could be useful for specialists in catalysis and nanomaterials as well as for graduate students studying chemistry and chemical engineering. The reported results can be applied for development of catalysts for the hydrogen production from different liquid organic hydrogen carriers.

formic acid decomposition --- hydrogen production --- CuO-CeO2/γ-Al2O3 --- multifuel processor --- copper catalyst --- oxygenates --- fuel cell --- Pd/C --- melamine --- g-C3N4 --- bipyridine --- phenanthroline --- N-doped carbon --- hydrogen --- formic acid --- platinum --- nitrogen doped --- carbon nanotubes --- carbon nanofibers --- heterogeneous catalysts --- bimetallic nanoparticles --- PdAg --- AgPd --- alloy --- nickel catalyst --- porous carbon support --- nitrogen doping --- hydrogen energetics --- hydrogen carrier --- formic acid dehydrogenation --- supported gold catalysts --- formic --- formate --- hybrid --- functionalization --- co-catalyst --- additive --- amine --- molecular catalyst --- nanocatalyst --- nano co-catalyst

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This Special Issue collects papers devoted to organic coatings based on polymers, graphene, and their combinations. These systems have great potentialities in the development of advanced materials for functional applications. In particular, graphene-based coatings on polymer substrates have interesting electrical characteristics, which are very sensible to the temperature and, therefore, they are very adequate for developing sensing materials and other types of functional materials.

Research & information: general --- Physics --- Si-containing diamond-like carbon film --- near-edge X-ray absorption fine structure --- dependence on the elemental composition --- graphene oxide --- green chemical reduction --- ascorbic acid --- reduced graphene oxide --- graphite nanoplatelet coatings --- low-density polyethylene --- differential scanning calorimetry --- dynamical-mechanical-thermal analyses --- thermoresistive properties --- optical-grade epoxy --- inorganic scintillator --- alkali metal halides --- adhesion --- interface --- Coulomb forces --- optical properties --- clinoptilolite --- impedimetric sensor --- surface conductivity --- apnea syndrome monitoring --- voltage drop --- microwave --- plasma-enhanced --- CVD --- nitrogen-doped --- graphene --- catalyst-less --- transfer-less --- synthesis --- n/a --- graphite platelet coatings --- thermal expansion coefficient --- phase transitions

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Catalysts are made of nanoparticles of metals, metal oxides, and other compounds that may act as active phases, support the latter, or a combination of both. The initial incentive to reduce as much as possible, up to the nano-scale, the size of the particles of active catalyst components is to maximize the surface area exposed to reactants, thus minimizing the specific cost per function and increasing the rate of conversion of feedstocks to products in relatively simple reactions. Nowadays, the interest in nanocatalyst developments has shifted to an emphasis on improving the selectivity of catalysts, allowing one to obtain desirable reactions in more complex synthetic processes. Thus, new generations of nanocatalysts should be designed at the molecular level to display well-defined structural characteristics, in terms of size, shapes, hierarchical porosity, and morphologies, as well as with controlled chemical composition. The development of efficient nanocatalysts supposes the characterization of their various surface active sites at the nanometer scale, which is focused on establishing synthesis–structure–performance relationships.

Research & information: general --- plasmonic photocatalyst --- metal nanoparticle --- N–TiO2 --- nanocomposites --- photocatalytic selective oxidation --- heterogeneous catalysis --- transition metal nitrides --- hydrogen production --- formic acid decomposition --- nickel catalyst --- calcium oxide promoter --- silica support --- Iron-based perovskites --- copper --- NO oxidation to NO2 --- NO2-assisted diesel soot oxidation --- soot oxidation under GDI exhaust conditions --- aqueous-phase reforming --- nickel --- ceria --- zirconia --- calcium --- yttrium --- methanol --- graphite --- reduced graphene oxide --- nitrogen-doped reduced graphene oxide --- exfoliation --- oxygen reduction reaction --- electrocatalysis --- UiO-66 --- iron --- cobalt --- nanocatalyst --- CO oxidation --- COProx --- methane --- oxidation catalysis --- formaldehyde --- magnetite iron oxide --- Fe3O4 --- palladium --- Pd --- silver --- Ag --- low-temperature activity --- nanocomposite --- Raman --- TG in air --- TG in hydrogen --- XRD --- electron microscopy --- EDS --- coordination polymers --- methane storage --- XRD crystallinity measurements --- mechanical shaping --- compaction --- VAM --- gas separation --- MOF pelletization --- catalysts --- dimerization --- isobutene --- olefins --- plasmonic photocatalyst --- metal nanoparticle --- N–TiO2 --- nanocomposites --- photocatalytic selective oxidation --- heterogeneous catalysis --- transition metal nitrides --- hydrogen production --- formic acid decomposition --- nickel catalyst --- calcium oxide promoter --- silica support --- Iron-based perovskites --- copper --- NO oxidation to NO2 --- NO2-assisted diesel soot oxidation --- soot oxidation under GDI exhaust conditions --- aqueous-phase reforming --- nickel --- ceria --- zirconia --- calcium --- yttrium --- methanol --- graphite --- reduced graphene oxide --- nitrogen-doped reduced graphene oxide --- exfoliation --- oxygen reduction reaction --- electrocatalysis --- UiO-66 --- iron --- cobalt --- nanocatalyst --- CO oxidation --- COProx --- methane --- oxidation catalysis --- formaldehyde --- magnetite iron oxide --- Fe3O4 --- palladium --- Pd --- silver --- Ag --- low-temperature activity --- nanocomposite --- Raman --- TG in air --- TG in hydrogen --- XRD --- electron microscopy --- EDS --- coordination polymers --- methane storage --- XRD crystallinity measurements --- mechanical shaping --- compaction --- VAM --- gas separation --- MOF pelletization --- catalysts --- dimerization --- isobutene --- olefins