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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.

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

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Carbon materials are one of the most fascinating materials because of their unique properties and potential use in several applications. They can be obtained from residues or by using advanced synthesis technologies like chemical vapor deposition. The carbon family is very broad, ranging from classical activated carbons to more advanced species such as carbon nanotubes and graphene. The surface chemistry is one of the most interesting aspects of this broad family of materials, which allows the incorporation of different types of chemical functionalities or heteroatoms on the carbon surface, such as O, N, B, S, or P, which can modify the acid–base character, hydrophobicity/hydrophilicity, or the electronic properties of these materials and, thus, determine the final application. This book represents a collection of original research articles and communications focused on the synthesis, properties, and applications of heteroatom-doped functional carbon materials.

targeted adsorption --- graphene oxide --- bonding type --- oxygen reduction reaction (ORR) --- doping --- catalysis --- porous carbon --- Cd(II) --- nitrogen-doped graphene oxide --- sp3-defect --- heteroatoms --- amino group --- nitrogen-doped --- energy storage --- cross-link bond type --- energy power density --- polyaniline --- environmental remediation --- molten salt --- adsorption --- polyphosphates --- microcrystalline cellulose --- carbo microsphere --- Orange G --- carbon materials --- chemical functionalization --- physicochemical properties --- supercapacitor capacitance --- nanoparticles and shallow reservoirs --- pulse laser deposition --- co-activation method --- carbon capture and storage process (CCS) --- biochar --- CO2 --- adsorption studies --- graphene --- polypyrrole --- oxygen peroxide oxidation --- carbon nanotubes --- salt and base --- nanofluids --- carbon gels --- bio-phenol resin --- synergism --- magnetic moment --- photocatalysis --- oxygen reduction reaction --- carbon dioxide --- surface chemistry --- functionalized graphene oxide --- nitrogen-doped carbon materials --- N–doped carbon --- p-phenylene diamine --- electrochemical analysis --- mesoporosity --- carbon dioxide adsorption --- electrode material --- nitrogen-doped graphene --- nitrogen and oxygen doped activated carbon --- electrocatalysis --- supercapacitor