Correction: Aceto et al. Thermal and Plasma-Assisted CO₂ Methanation over Ru/Zeolite: A Mechanistic Study Using In-Situ Operando FTIR. Catalysts 2023, 13, 481

The Editorial Office and Editorial Board are announcing the finished post-publication review process, as well as an update to the original publication [1]. Following concerns raised about the integrity of the peer review, the Editorial Office has conducted a post-publication peer review of this article. This process included the recruitment of two new independent reviewers and was supervised by the original Academic Editor to ensure full compliance with MDPI’s Editorial Process (https://www.mdpi.com/editorial_process).

As a result of this process, the original Academic Editor and the authors have agreed to update the following aspects of this publication:

Reviewer report 1 was removed from the peer review record, and the new report was uploaded (https://www.mdpi.com/2073-4344/13/3/481/review_report).

Error in Figure

In the original publication [1], there was a mistake in the captions of Figures 5 and 11. The corrected captions appear below.

• Figure 5. Evolution of the relative concentrations (left axis) of CH₄ (g), adsorbed CO (2050–1750 cm⁻¹), and formates (1410–1370 cm⁻¹); CO₂ conversion (%, right axis, red) during CO₂ methanation over 3Ru/CsUSY (connected symbols) and according to the thermodynamic limit of the reaction (dashed lines); CH₄ selectivity (%, right axis, grey) during CO₂ methanation over 3Ru/CsUSY (connected symbols) and according to the thermodynamic limit of the reaction (dashed lines).
• Figure 11. Schematic representation of the proposed mechanism for plasma-assisted CO₂ methanation over 3Ru/CsUSY.

In addition, Figure 12 was updated for clarity and to align it with another schematics. The corrected Figure 12 appears below.

Corrected Citations

References [29,30] have been removed due to low relevancy to the content of the article. As a result, the order of references has been adjusted accordingly.

Text Correction

There were a few errors in the original publication.

A band used to semi-quantitatively follow the evolution of formate species was incorrectly labeled, and a correction has been made to the Results, Section 2.2.1, paragraph 2:

“Similarly, bands between 1410 and 1370 cm⁻¹, that can be ascribed to monodentate formates (as well as the band at 1580 cm⁻¹), decrease until a negative peak is formed.”

Bands used to follow the evolution of formate species were incorrectly stated, and a correction has been made to the Materials and Methods, Section 4.3.1, paragraph 2:

“Integrations of the specific absorbance ranges was used to quantify the CO, CO₂ and CH₄: 2050–1750 cm⁻¹, 2450–2250 cm⁻¹ and 3200–2800 cm⁻¹, respectively, while bands falling in the 1410–1370 cm⁻¹ range were used to quantify formates. The obtained data were normalized by setting the maximum and minimum value of each set to 1 and 0. Regarding the evolution of adsorbed CO, the relative quantification takes into account all types of CO (monodentate, bidentate and bridged).”

Additionally, minor grammar and spelling mistakes were corrected throughout the whole document in an effort to improve the clarity of the text.

The authors state that the scientific conclusions are unaffected. This correction was approved by the Academic Editor. The original publication has also been updated.