Nanodiamond Supported Ultra-Small Palladium Nanoparticles as an Efficient Catalyst for Suzuki Cross-Coupling Reactions

Round 1

Reviewer 1 Report

Comments and Suggestions for Authors

In the work, the authors have investigated the Nanodiamond Supported Ultra-Small Palladium Nanoparticles as an Efficient Catalyst for Suzuki Cross-Coupling Reactions. This reaction is of interest. This study is executed very well and this manuscript describes interesting findings of Suzuki Cross-coupling reactions using Nanodiamond Supported Ultra-Small Palladium Nanoparticles. I suggest that this manuscript is published after the authors address the following:

1)     The authors mentioned the crystalline peaks of Pd from XRD patterns. But such peaks were not seen in Fig.1. Justify the answer.

2)     Initially, the nanodiamond is oxidized and deposited the Pd nps using NaBH4 as a reducing agent. The oxidation of ND and its importance is not mentioned in the manuscript. I would suggest the authors prepare the Pd/ND without the oxidation of ND and perform the catalytic performance.

3) The XPS analysis showed 87% of Pd and 17% of PdO. However, the explanation about the PdO species is not mentioned. Why?

4)     The optimization of reaction temperature was not observed in the manuscript. How the authors selected the reaction temperature as 100 ᵒC.

5) Table 2, entry 12, the product yield is less. Why?

6)     Products can be included in the Table 2.

 

 

Comments on the Quality of English Language

Can be improved.

Author Response

Please see the attachment.

Author Response File: Author Response.pdf

Reviewer 2 Report

Comments and Suggestions for Authors

The manuscript reports the preparation of a nanocatalyst comprising ultra-small palladium nanoparticles supported on nanodia-monds (ultra-small Pd/rNDs) fabricated by reduction of palladium (II) salt on oxidized nanodiamond. Then this catalyst is used in Suzuki cross-coupling reaction with phenyl iodide or aryliodide with phenyl or arylboronic acid.

The manuscript is welle written, clear and reports news unpublished results on Suzuki coss-coupling. Moreover the method discoses the possibility to perform the cros-coupling reaction in a mixture of water/ethanol solvent and also demonstrate that the heterogeneous catalyst can be reused up to 5 times.

I recommend the acceptance of the manuscript with only two minor corrections:

-          The authors must explain what they mean as selectivity with this reaction. It is not clear and this selectivity is not mentioned or explained in the manuscript. What can append in this reaction if it is not a Suzuki cross-coupling reaction?

-          Several typos have to be corrected:

o   Page 2: Addittonally: additionally

o   Page 2: attenditon: attention

o   Page 2: Interesring: interesting

o   Page 2: In, catalysis fields: In catalysis fields

o   Page 3: Nanodimond: nanodiamond

o   Page 3: Hihgly: highly

o   Page 4: agglomeratiion: agglomeration

o   Page 4: catalytic is a effective and easy: catalystic is effective and easy

Comments on the Quality of English Language

Some typos have to be correct

Author Response

Please see the attachment

Author Response File: Author Response.pdf

Round 2

Reviewer 1 Report

Comments and Suggestions for Authors

Answered each and every question properly. Now the manuscript came accepted in its present form.