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Related Concept Videos

Heterogeneous Catalysis01:22

Heterogeneous Catalysis

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Heterogeneous catalysis involves a catalyst in a different phase from the reactants. It is a process where the catalyst and the reactants are in distinct phases, typically solid and gas or liquid.Most heterogeneous catalysts are metals, metal oxides, or acids. The list includes transition metals like iron (Fe), cobalt (Co), nickel (Ni), palladium (Pd), platinum (Pt), chromium (Cr), manganese (Mn), tungsten (W), silver (Ag), and copper (Cu). These metals possess partially vacant d orbitals that...
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Metal-Ligand Bonds02:51

Metal-Ligand Bonds

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The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
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Catalysis02:50

Catalysis

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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.
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Reduction of Alkenes: Asymmetric Catalytic Hydrogenation02:17

Reduction of Alkenes: Asymmetric Catalytic Hydrogenation

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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...
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Carboxylic Acids to Methylesters: Alkylation using Diazomethane01:33

Carboxylic Acids to Methylesters: Alkylation using Diazomethane

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Carboxylic acids react with diazomethane in an ether solvent via alkylation at the carboxylate oxygen atom to give methyl esters of the corresponding acid with excellent yields.
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Complexation Equilibria: The Chelate Effect01:19

Complexation Equilibria: The Chelate Effect

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In complexation reactions, metal atoms or cations interact with ligands to form donor-acceptor adducts called metal complexes. Ligands that bind through one donor site are monodentate, ligands with two donor sites are bidentate, and those with more than two donor sites are polydentate ligands. For example, ethylene diamine is a bidentate ligand that binds through two nitrogen donor atoms, forming a five-membered ring. EDTA is a polydentate ligand that binds through four oxygen and two nitrogen...
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Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
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Reactant‑Transporting Metal-Support Interaction for Lattice Carbonate‑to‑Methane Catalysis.

Guangxing Yang1, Hanke Li2,3, Yiming Niu4

  • 1School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, P. R. China.

Angewandte Chemie (International Ed. in English)
|April 29, 2026
PubMed
Summary
This summary is machine-generated.

A novel strong metal-reactive support interaction (SMRSI) enables platinum catalysts to hydrogenate lattice carbonate to methane at low temperatures. This discovery offers a new pathway for accelerating the slow carbon cycle using Earth's largest carbon reservoir.

Keywords:
hydrogenationlattice carbonatemethanereactant‑transporting metal‐support interaction

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Area of Science:

  • Heterogeneous catalysis
  • Materials science
  • Geochemistry
  • Carbon cycle research

Background:

  • Metal-support interactions (MSI) are crucial in heterogeneous catalysis, influencing activity, selectivity, and stability through electronic and geometric effects.
  • Lattice carbon in carbonate minerals represents Earth's largest carbon reservoir, with potential for carbon cycle management.
  • Existing catalytic approaches primarily focus on CO2 management related to the fast carbon cycle (FCC).

Purpose of the Study:

  • To report a new form of metal-support interaction (MSI) that facilitates reactant transport.
  • To demonstrate the direct hydrogenation of lattice carbonate to methane using this novel interaction.
  • To explore the potential of low-temperature lattice-carbonate conversion for accelerating the slow carbon cycle (ACC).

Main Methods:

  • Utilized operando techniques to investigate the catalytic process.
  • Characterized the dynamic interfacial behavior between the metal catalyst and the carbonate support.
  • Analyzed reaction kinetics to differentiate between low-temperature solid-state and high-temperature gas-phase pathways.

Main Results:

  • A strong metal-reactive support interaction (SMRSI) was identified, enabling Pt/H2 to hydrogenate calcite lattice carbonate to methane with high selectivity (>98%) starting at ≤415°C.
  • An amorphous, permeable interphase was observed to transport carbonate ions (CO3^2-) to active sites, forming a mobile triple-phase boundary.
  • The process involves interfacial CO2 release, hydrogenation of a CO intermediate to methane, and subsequent re-carbonation of the solid product, regenerating the carbonate and maintaining selectivity over cycles.

Conclusions:

  • SMRSI represents a reactant-transporting mechanism, extending the concept of MSI beyond electronic/geometric tuning.
  • This catalytic approach offers a complementary strategy to FCC-based CO2 management by enabling low-temperature conversion of the ACC reservoir.
  • The findings highlight the role of dynamic solid-solid@gas interfaces in mediating solid reactant transformations.