Carbon dioxide activation and dissociation on ceria (110): a density functional theory study

Study on the CO Oxidation over Ceria-Based Nanocatalysts

A series of ceria nanocatalysts have been prepared to study the structure dependency of the CO oxidation reaction. The ceria samples with well-defined nanostructures (nanocubes/Ce-NC and nanorods/Ce-NR) have been prepared using the hydrothermal method. Mesoporous ceria (Ce-MES) and ceria synthesized with solution combustion technique (Ce-SCS) have also been prepared for comparison. The lowest CO oxidation temperature has been reached by using ceria nanocubes (Ce-NC). This high activity draws immense contributions from the highly reactive (100) and (110) surfaces of the truncated nanocubes. The Ce-MES and Ce-SCS samples, despite their high surface areas, are unable to outdo the activity of Ce-NC and Ce-NR due to the abundant presence of (111) crystalline planes. This finding confirms the structure sensitivity of CO oxidation reaction catalyzed with ceria.

Phase-dependent enhancement for CO2 photocatalytic reduction over CeO2/TiO2 catalysts

The addition of CeO₂ can increase the activity of rutile for CO₂ photoreduction under simulated sunlight irradiation because of the presence of Ti defects at the CeO₂–rutile interfaces, and this is beneficial to the interfacial separation of photogenerated charge carriers.

Methane adsorption and dissociation on iron oxide oxygen carriers: the role of oxygen vacancies

We investigated the interaction between methane and iron oxide oxygen carrier for chemical looping reaction systems and found the oxygen vacancies can facilitate methane conversion.

Oxygen vacancy promoted methane partial oxidation over iron oxide oxygen carriers in the chemical looping process

We found that oxygen vacancies can promote CH₄ partial oxidation on iron oxide oxygen carriers during the chemical looping process.

Mechanistic and microkinetic analysis of CO2 hydrogenation on ceria

We evaluate the formate and carbonate routes for CO₂ hydrogenation to methanol on oxygen-deficient ceria using thermochemistry and microkinetic analyses.

The effect of the morphology of supported subnanometer Pt clusters on the first and key step of CO2 photoreduction

Other than the chemistry of the Pt cluster, the cluster morphology also determines CO₂ binding, attributed to structural fluxionality and bonding competitions among Pt atoms and CO₂.

Surface electrochemistry of CO2reduction and CO oxidation on Sm-doped CeO2−x: coupling between Ce3+and carbonate adsorbates

Strong coupling between carbonate coverage, surface Ce³⁺concentration and overpotential reveals rate-limiting step in CO oxidation and CO₂reduction.

Dimethyl carbonate synthesis from carbon dioxide and methanol over CeO2versus over ZrO2: comparison of mechanisms

A comparison of the mechanisms of dimethyl carbonate (DMC) formation directly from carbon dioxide and methanol over CeO₂versus over ZrO₂ is made through in-situ Fourier transform infrared spectroscopy (FTIR).