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Absorption spectra. --- Infrared spectra. --- Formic acid. --- Acetic acid.

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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 --- 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 book focuses on catalytic hydrogen generation from formic acid, ammonia borane, and ethanol as well as on the production of fuels from tar using formic acid as a hydrogen source. The list of discussed catalysts includes single-atom catalysts, metallic/bimetallic catalysts, and supported metal complexes. These catalysts were thoroughly characterized using different methods. Optimized catalyst compositions are proposed.

Technology: general issues --- Chemical engineering --- hydrocracking --- tar --- formic acid --- nickel --- zeolite --- hydrogen donor --- catalyst --- formic acid decomposition --- hydrogen --- biomass --- metal complex --- heterogeneous catalyst --- ruthenium --- iridium --- iron --- palladium --- nitrogen --- carbon nanotubes --- ammonia borane --- hydrogen production --- hydrogen carrier --- hydrogen storage --- Ru nanoparticles --- renewable hydrogen --- biofuel --- reforming of bioethanol --- bimetallic catalyst --- modifier --- catalysts

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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