Nickel Glycerolate Overcoming a High-Entropy Configuration for High-Performance Oxygen Evolution Reaction
, Timothy G. Ritter 3, Reza Shahbazian-Yassar 4, Josué M. Gonçalves 1,4,* and Lúcio Angnes 1,*Round 1
Reviewer 1 Report
In this manuscript, the authors synthesized a series of Ni-based catalysts derived from glycerol using a one-step solvothermal method. The NiG catalyst exhibited an excellent OER performance with an overpotantial of 310 mV at 10 mA cm-2. The outstanding catalytic activity of NiG toward the OER is originated from the transformation of Ni(OH)2 to NiOOH. However, there are some issues in the present manuscript that need to be addressed. I suggest accepting this manuscript after major revisions by answering the questions below.
1. Please double-check the Nernst equation.
2. In the XPS analysis, some key references are missing.
3. The authors demonstrated that high OER catalytic activity of NiG is originated from the transformation of Ni(OH)2 to NiOOH. However, the authors forgot to prove the presence of NiOOH by the XRD or HR-TEM image.
4. The resistance of solution is suggested to be provided.
5. The SEM images of NiG after OER stability test is suggested to be offered.
6. Please confirm if the journal name needs to be abbreviated to meet the requirements of Catalysts journal.
7. In this manuscript, some literatures related to electrochemical OER are suggested to be cited, such as Journal of Materials Chemistry A, 2021, 9, 25773–25795; Nano-Micro Letters, 2023, 15, 52; Coordination Chemistry Reviews 2022, 466, 214604.
8. More references are suggested to be added in Table 2 for comparison.
9. Did the authors explore the different ratio of elements on the catalysis performance of NiMnZnCoMgG?
Moderate editing of English language is required.
Author Response
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Author Response.pdf
Reviewer 2 Report
This paper introduces Ni glycerolate(NiG)’s excellent electrocatalytic activity toward the oxygen evolution reaction(OER) and good stability for 24 hours which is attributed to the NiOOH active phase generated during the electrochemical cycling. A high-entropy glycerolate containing Ni, Zn, Mn, Mg, and Co ions (HEG) and their respective sub-systems such as NiG, NiMnG, and NiMnZnG were prepared and tested. The SEM-EDS images showed nicely the morphology of the microspheres.
Comments
1. What are the catalytic properties compared to reference materials such as IrOx and RuOx, which are known as good catalysts for OER? It would be nice to compare the catalyst characteristics (overpotential, Tafel slope) with the reference material.
2. Line 137, four major processes are mentioned, but there is no explanation about the second and fourth processes of TGA curve.
3. Figure 3 needs a legend like Figure 2.
4. Line 180, 192 HE à HEG
5. The terms for NiMnZnMgCoG or NiMnZnCoMgG needed to be consistent.
6. An explanation of abbreviation about HEO is needed in the text.
n/c
Author Response
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Author Response File: Author Response.pdf
