The Effect of Precursor Concentration on the Crystallite Size of CeO2 to Enhance the Sulfur Resistance of Pt/CeO2 for Water Gas Shift
and Hyun-Seog Roh 1,*Round 1
Reviewer 1 Report
Comments and Suggestions for Authors1.There are two CO2 calculation formulations in lines 400-401 of this paper. The CH4 selectivity is mentioned in the article, but the calculation formula is not found.
2.The product concentration of outlet gas components is not shown in this paper. The components should be introduced to analyze the reaction process.
3.The modified CO pulse chemisorption method is introduced in lines 149 to 161. But during the CO2 pretreatment process, how to make sure the adsorption saturation of the CeO2.
4.In most papers, the Ce 3d spectra always be deconvoluted into 8 peaks. But in Figure 5 (A), the Ce 3d spectra was deconvoluted into 10 peaks. Please explain the principle for peaks in detail.
Author Response
Author's Notes to Reviewer are contained in the attached file.
Author Response File: 
Author Response.pdf
Reviewer 2 Report
Comments and Suggestions for AuthorsReview of Manuscript ID: catalysts-2825475-peer-review-v1
The submitted paper is devoted to “The effect of precursor concentration on the crystallite size of CeO2 to enhance the sulfur resistance of Pt/CeO2 for water gas shift”. The topic of the work is attractive because the utilization of waste to produced hydrogen is the path to decarbonization of industries and energy systems as well as production of green energy by usage of clean hydrogen production by water gas shift reaction.
The conception of the work is very clear and the authors’ investigations are directed to develop sulfur–resistant Pt/CeO2 catalyst when waste–derived synthesis gas contains some H2S, not removed previously. The approach of the authors for verification of activity is right and well done by estimation of resistance to sulfur injecting of H2S and verification of catalytic activity after this stress-test. The methods applied for analysis of structure and properties are appropriated to define the clear advantages the Pt catalyst supported on CeO2 prepared with the highest precursor concentration as the best sulfur resistant and active catalyst.
I recommend this manuscript to be accepted in current version.
Author Response
The submitted paper is devoted to “The effect of precursor concentration on the crystallite size of CeO2 to enhance the sulfur resistance of Pt/CeO2 for water gas shift”. The topic of the work is attractive because the utilization of waste to produced hydrogen is the path to decarbonization of industries and energy systems as well as production of green energy by usage of clean hydrogen production by water gas shift reaction.
The conception of the work is very clear and the authors’ investigations are directed to develop sulfur–resistant Pt/CeO2 catalyst when waste–derived synthesis gas contains some H2S, not removed previously. The approach of the authors for verification of activity is right and well done by estimation of resistance to sulfur injecting of H2S and verification of catalytic activity after this stress-test. The methods applied for analysis of structure and properties are appropriated to define the clear advantages the Pt catalyst supported on CeO2 prepared with the highest precursor concentration as the best sulfur resistant and active catalyst.
I recommend this manuscript to be accepted in current version.
Response: Thank you for your valuable review.
