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This book gathers selected research on the preparation, characterization and application of new organic/inorganic composites endowed with photo(electro)catalytic properties for the photocatalytic production of H2. In these pilot studies, the photoactive materials were tested under either UV-visible or, even more conveniently, under visible light for H2 evolution in “sacrificial water splitting” or “photoreforming” systems. In addition, a review article on the use of 2D materials and composites as potential photocatalysts for water splitting is included.

Technology: general issues --- WO3 --- TiO2 --- hydrogen production --- photoelectrocatalysis --- pancake-like porous carbon nitride --- bottom-up method --- water splitting --- visible light photocatalyst --- photocatalyst --- graphene oxide --- phosphorene --- graphitic carbon nitride --- MOFs --- ethanol reforming --- Au catalyst --- Ti3+ defect --- site-specific deposition --- hydrogen --- catalyst --- photocatalysis --- biomass --- solar light --- perovskite --- carbon nitride --- design of experiments --- n/a

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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 Special Issue contains some recently experimental and theoretical advances in hydrogen evolution reaction, oxygen evolution reaction, and oxygen reduction reaction, and the applications in water splitting, proton exchange membrane fuel cells, and lithium-ion batteries.

Technology: general issues --- History of engineering & technology --- Materials science --- SnSe --- 2D materials --- hydrogen evolution --- water splitting --- DFT calculations --- defect engineering --- proton exchange membrane fuel cell --- high energy efficiency --- durability --- degradation --- Pt/C catalyst --- anode --- flexible electronics --- nanosheets --- SnO2 --- oxygen reduction reaction --- fluorination --- density functional theory --- non-noble metal catalyst --- N-doped carbon catalyst --- hydrogen evolution reaction --- porous carbon --- PtNi alloy --- platinum --- nanoparticles --- electrochemistry --- reduced graphite oxide --- microwave --- ionic liquid --- tunable aryl alkyl ionic liquid --- metal-organic frameworks (MOF) --- electrocatalysis --- oxygen evolution reaction (OER) --- nickel --- ketjenblack --- Sm0.5Sr0.5Co1−xNixO3−δ --- perovskite --- cathode electrocatalyst --- OER/ORR --- two-dimensional metal-organic framework --- ligand --- single-atom catalysts --- oxygen evolution reaction --- n/a

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This Special Issue contains some recently experimental and theoretical advances in hydrogen evolution reaction, oxygen evolution reaction, and oxygen reduction reaction, and the applications in water splitting, proton exchange membrane fuel cells, and lithium-ion batteries.

Technology: general issues --- History of engineering & technology --- Materials science --- SnSe --- 2D materials --- hydrogen evolution --- water splitting --- DFT calculations --- defect engineering --- proton exchange membrane fuel cell --- high energy efficiency --- durability --- degradation --- Pt/C catalyst --- anode --- flexible electronics --- nanosheets --- SnO2 --- oxygen reduction reaction --- fluorination --- density functional theory --- non-noble metal catalyst --- N-doped carbon catalyst --- hydrogen evolution reaction --- porous carbon --- PtNi alloy --- platinum --- nanoparticles --- electrochemistry --- reduced graphite oxide --- microwave --- ionic liquid --- tunable aryl alkyl ionic liquid --- metal-organic frameworks (MOF) --- electrocatalysis --- oxygen evolution reaction (OER) --- nickel --- ketjenblack --- Sm0.5Sr0.5Co1−xNixO3−δ --- perovskite --- cathode electrocatalyst --- OER/ORR --- two-dimensional metal-organic framework --- ligand --- single-atom catalysts --- oxygen evolution reaction --- SnSe --- 2D materials --- hydrogen evolution --- water splitting --- DFT calculations --- defect engineering --- proton exchange membrane fuel cell --- high energy efficiency --- durability --- degradation --- Pt/C catalyst --- anode --- flexible electronics --- nanosheets --- SnO2 --- oxygen reduction reaction --- fluorination --- density functional theory --- non-noble metal catalyst --- N-doped carbon catalyst --- hydrogen evolution reaction --- porous carbon --- PtNi alloy --- platinum --- nanoparticles --- electrochemistry --- reduced graphite oxide --- microwave --- ionic liquid --- tunable aryl alkyl ionic liquid --- metal-organic frameworks (MOF) --- electrocatalysis --- oxygen evolution reaction (OER) --- nickel --- ketjenblack --- Sm0.5Sr0.5Co1−xNixO3−δ --- perovskite --- cathode electrocatalyst --- OER/ORR --- two-dimensional metal-organic framework --- ligand --- single-atom catalysts --- oxygen evolution reaction