Hybrid Composite of Subnanometer CoPd Cluster-Decorated Cobalt Oxide-Supported Pd Nanoparticles Give Outstanding CO Production Yield in CO2 Reduction Reaction
, Dinesh Bhalothia 1,†, Shou-Shiun Yang 1, Amisha Beniwal 1, You-Xun Chang 1, Pin-Chieh Wang 1, Yu-Chia Cheng 1, Chi-Liang Chen 2, Shun-Chi Wu 1 and Tsan-Yao Chen 1,3,*Round 1
Reviewer 1 Report
The authors developed CoPd Clusters decorated Cobalt-Oxide Supported Pd Nanoparticles catalyst for CO2 hydrogenation to CO via RWGS reaction. This catalyst delivers a CO production yield of 3414 µmol/g with 99% selectivity of CO at 523 K in the ambient CO2 and H2 mixture (1:3). This paper is very interesting and relevant. I am suggesting the following changes which I think will lead to an improvement:
1. Authors should state the complete form of each abbreviation at its first appearance.
2. Explain a plausible mechanism of CO2 hydrogenation using this catalyst.
3. There are many incomplete sentences and grammatical mistakes in the manuscript. Carefully check and correct. Some of this text is not easily understandable for readers.
4. Lines 105 - 106. Please provide a brief procedure of the galvanostatic replacement reaction of this catalyst.
5. Lines 155 - 156. Please explain about O1, O2 and O3.
Author Response
September 21, 2022
Assistant Editor and reviewer
Catalysts
Dear Dr. Bernadette Chen
Thank you for your kind patience in waiting for our responses to the revision assignments by the reviewers. Below is the reference information for our submission and the responses to the referee’s comments.
Journal: Catalysts
Manuscript ID: catalysts-1930983
Title: "Hybrid Composite of Sub-Nanometer CoPd Clusters decorated Cobalt-Oxide Supported Pd Nanoparticle Performs Outstanding CO Production Yield in CO2"
Author(s): Che Yan, Dinesh Bhalothia, Shou-Shiun Yang, Amisha Beniwal, You-Xun Chang, Pin-Chieh Wang, Yu-Chia Cheng, Chi-Liang Chen, Shun-Chi Wu, Tsan-Yao Chen *
We have properly responded to the revision comments and revised the manuscript accordingly.
If you have any concerns or more additional materials are required, please do not hesitate to contact me. I will be happy to provide it.
Sincerely yours,
Tsan-Yao Chen
Author Response File: 
Author Response.pdf
Reviewer 2 Report
In this manuscript, Yan and co-workers describe that one kind of Co-Pd hybrid material can be used as catalyst boosting selective CO production from CO2 reduction. The size, morphology and element valence states of the catalysts were characterized in detail. Most of the main conclusions of the study can be supported by experimental data. Considering that catalytic conversion of carbon dioxide is an important scientific problem on a global scale, I believe this work can attract the attention of the scientific community to a certain extent. But before publication, the following issues need to be addressed:
1. The authors explain that the higher catalytic activity is mainly due to the enhanced adsorption of carbon dioxide by oxygen vacancies and the promotion of hydrogen splitting by Pd. But that doesn't explain why the catalyst selectively produces carbon monoxide instead of methane. I believe that in this catalytic reaction, selectivity and activity are equally important. An in-depth study of catalytic selectivity could make this study more meaningful.
2. Is there any carbon deposition on the catalyst during the catalytic process? Have the authors attempted to characterize the catalyst after catalysis performance? Will the size and morphology of the catalyst change after long-term operation?
3. Some low-magnification TEM images to demonstrate the catalyst morphology should be provided. The scale bars in the TEM images are not very clear and need to be improved.
4. Are catalysts durable? How long can it work continuously? Do activity and selectivity change over long runs? Can it be recycled? Research on catalyst durability needs to be demonstrated.
5. Some writing errors should be avoided as much as possible. For example, line 289, “… performance of CP-CoOx VPd NC NC was evaluated…”
I believe that this work totally needs to be shown to more scholars after there are more in-depth studies on catalytic performance.
Author Response
September 21, 2022
Assistant Editor and Reviewer
Catalysts
Dear Dr. Bernadette Chen
Thank you for your kind patience in waiting for our responses to the revision assignments by the reviewers. Below is the reference information for our submission and the responses to the referee’s comments.
Journal: Catalysts
Manuscript ID: catalysts-1930983
Title: "Hybrid Composite of Sub-Nanometer CoPd Clusters decorated Cobalt-Oxide Supported Pd Nanoparticle Performs Outstanding CO Production Yield in CO2"
Author(s): Che Yan, Dinesh Bhalothia, Shou-Shiun Yang, Amisha Beniwal, You-Xun Chang, Pin-Chieh Wang, Yu-Chia Cheng, Chi-Liang Chen, Shun-Chi Wu, Tsan-Yao Chen *
We have properly responded to the revision comments and revised the manuscript accordingly.
If you have any concerns or more additional materials are required, please do not hesitate to contact me. I will be happy to provide it.
Sincerely yours,
Tsan-Yao Chen
Author Response File: Author Response.pdf
Round 2
Reviewer 2 Report
The authors have revised the manuscript well. I think the current version is suitable for publication.
