Corrosion Inhibition of Nickel in HCl Solution by Some Indole Derivatives

Fouda, A.S.; Tawfik, H.; Abdallah, N.M.; Ahmd, A.M.

doi:10.1016/s1452-3981(23)14399-9

Cited by 13 publications

(1 citation statement)

References 34 publications

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“…The corrosion of Ni foam was visible after cleaning with higher-concentration HCl [ 91 ]. Nickel is amongst the few strong, wrought materials with useful resistance to corrosion by hydrochloric acid, but the rates of corrosion increase with the acid concentration [ 92 , 93 ]. Although Ni can provide some resistance to dilute HCl, corrosion is enhanced by aeration and the presence of oxidizing agents in the acid [ 94 ].…”

Section: Resultsmentioning

confidence: 99%

Supercapacitor Electrodes: Is Nickel Foam the Right Substrate for Active Materials?

Dojčinović,

Stojković Simatović,

Nikolić

2024

Materials

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Ni foam is an extensively used current collector and substrate in investigations of electrochemically active materials such as supercapacitors and electrocatalysts for oxygen and hydrogen evolution reactions. This material is relatively cheap, porous, and conductive and has a large specific surface area, all of which make it a good substrate. We investigated Ni-Mg ferrites and NiMn2O4 as active materials for electrochemical energy storage. These materials, when loaded on Ni foam, gave promising capacitance values: 172 F/g (at 2 mV/s) for NiMn2O4 in 6 M KOH and 242 F/g (at 2 mV/s) for MgFe2O4 in 3 M KOH. Nevertheless, during the authors’ work, many experimental problems occurred. Inconsistencies in the results directed further investigation towards measuring the capacitance of the active materials using GCE and platinum electrodes as substrates to discover if Ni foam was the culprit of the inconsistencies. When non-nickel substrates were used, both NiMn2O4 and MgFe2O4 showed reduced capacitance. Experimental problems associated with the utilization of Ni foam as a substrate for active materials in supercapacitor electrodes are discussed here, combined with other problems already addressed in the scientific literature.

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Section: Resultsmentioning

confidence: 99%