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Volume 9
Issue 9
10.3390/catal9090749
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Article
Peer-Review Record

New Insights into the Electrocatalytic Mechanism of Methanol Oxidation on Amorphous Ni-B-Co Nanoparticles in Alkaline Media

Catalysts 2019, 9(9), 749; https://doi.org/10.3390/catal9090749
by Fanhua Wu 1,2, Zhonglin Zhang 1, Fusheng Zhang 1, Donghong Duan 1, Yu Li 1, Guoqiang Wei 1, Shibin Liu 1,*, Qinbo Yuan 3,4,*, Enzhi Wang 3,4 and Xiaogang Hao 1
Reviewer 1: Anonymous
Reviewer 2: Anonymous
Catalysts 2019, 9(9), 749; https://doi.org/10.3390/catal9090749
Submission received: 18 August 2019 / Revised: 1 September 2019 / Accepted: 2 September 2019 / Published: 5 September 2019
(This article belongs to the Section Electrocatalysis)

Round 1

Reviewer 1 Report

This manuscript contains the interesting matter. I recommend the publication after revision as following:

Line 20: D0 -> 0 is subscript. Line 21-22, 169: Not only relative values of diffusion coefficient but also absolute ones should be presented. Line 36-37: Mention the advantage of Ni from the point of cost compared with Pt Figure 3: There is not peak assignment of CV. Line 211: There is not description for analyte although table 1 is methanol. Figure 5e-h: How about the oxidation peak of Ni(OH)2 to NiOOH. Table 3: Although authors claim that the optimum is Ni-B-Co0.05, Ni-B-Co0.1 is the optimum for Ea. Line 358, 439: font of “nanoparticles” is different from the other sentences and words.

Author Response

Please see the attachment

Author Response File: Author Response.pdf

Reviewer 2 Report

This manuscript describes about methanol oxidation by amorphous Ni-B-Co nanoparticles electrode. The proposed idea is useful for DMFCs.

I would like to give following comments for further improvement.

 

(1) In Introduction, the concept of band is not provided well. Author doped boron into the Ni nanoparticle. In the case of alloy, the energy level of band has very important role, because the collective band of Ni-B-Co is formed. However, Author mentioned only the collective band of Ni3d-Co. Therefore, more discussion about the band is definitely necessary for this article.

(2) XP Spectra indicates the scattering effect due to the formation of nano-structure. In this case, the observed binding energy is not reliable well.

(3) TEM images showed the core-shell structure. See the surface of the particle. The layer might be doped material. Could you identify the materials from the image?

(4) Figure 3 shows the redox behavior of the electrode. Please discuss the charge density to discuss about the quantitative analysis.

 

Author Response

Please see the attachment

Author Response File: Author Response.pdf

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