Mini-Review on Catalytic Hydrogen Evolution from Porphyrin-Graphene Structures
Emmanouil Nikoloudakis1, Athanassios G Coutsolelos1,2, Emmanuel Stratakis1,3
1Institute of Electronic Structure and Laser (IESL), Foundation for Research and Technology-Hellas (FORTH), Vassilika Vouton, 70013 Heraklion, Crete, Greece.
Summary
Porphyrin-graphene materials show promise for efficient hydrogen production. This review covers their use in catalysis, challenges, and future directions for sustainable energy.
Area of Science:
- Materials Science
- Catalysis
- Renewable Energy
Background:
- Porphyrin derivatives are key in H2 production systems.
- Graphene materials offer advanced electronic properties and stability.
- Combining porphyrins with 2D materials enhances catalytic performance.
Purpose of the Study:
- To review recent advances in porphyrin-graphene ensembles for catalytic H2 generation.
- To discuss current challenges and future outlooks in this field.
Main Methods:
- Literature review of photocatalytic, electrocatalytic, and photoelectrocatalytic systems.
- Focus on the synergistic effects of porphyrin-graphene composites.
Main Results:
- Porphyrin-graphene ensembles demonstrate significant potential in hydrogen evolution reactions.
- These materials offer improved efficiency and stability compared to individual components.
Conclusions:
- Porphyrin-graphene composites are promising for efficient and cost-effective hydrogen production.
- Further research is needed to overcome current challenges and optimize these systems for industrial applications.
Related Concept Videos
Reduction of Alkenes: Catalytic Hydrogenation
11.9K
Alkenes undergo reduction by the addition of molecular hydrogen to give alkanes. Because the process generally occurs in the presence of a transition-metal catalyst, the reaction is called catalytic hydrogenation.
Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
The hydrogenation process takes place on the...
Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
The hydrogenation process takes place on the...
11.9K
Reduction of Alkenes: Asymmetric Catalytic Hydrogenation
3.2K
Catalytic hydrogenation of alkenes is a transition-metal catalyzed reduction of the double bond using molecular hydrogen to give alkanes. The mode of hydrogen addition follows syn stereochemistry.
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
3.2K
Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation
7.6K
Introduction
Like alkenes, alkynes can be reduced to alkanes in the presence of transition metal catalysts such as Pt, Pd, or Ni. The reaction involves two sequential syn additions of hydrogen via a cis-alkene intermediate.
Like alkenes, alkynes can be reduced to alkanes in the presence of transition metal catalysts such as Pt, Pd, or Ni. The reaction involves two sequential syn additions of hydrogen via a cis-alkene intermediate.
7.6K
Catalysis
26.7K
The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.
26.7K
Reduction of Benzene to Cyclohexane: Catalytic Hydrogenation
4.3K
Unlike the easy catalytic hydrogenation of an alkene double bond, hydrogenation of a benzene double bond under similar reaction conditions does not take place easily. For example, in the reduction of stilbene, the benzene ring remains unaffected while the alkene bond gets reduced. Hydrogenation of an alkene double bond is exothermic and a favorable process. In contrast, to hydrogenate the first unsaturated bond of benzene, an energy input is needed; that is, the process is endothermic. This is...
4.3K


