Electrochemical reduction of iron oxide in molten sodium hydroxide based on a Ni0.94Si0.04Al0.02 metallic inert anode

Shubo Wang; Jianbang Ge; Yuejiao Hu; Hongmin Zhu; Shuqiang Jiao

doi:10.1016/j.electacta.2012.09.044

Electrochemical reduction of iron oxide in molten sodium hydroxide based on a Ni_0.94Si_0.04Al_0.02 metallic inert anode

Shubo Wang, Jianbang Ge, Yuejiao Hu, Hongmin Zhu, Shuqiang Jiao

Research output: Contribution to journal › Article › peer-review

16 Citations (Scopus)

Abstract

Electrochemical tests, including anodic polarization, Tafel polarization and electrochemical impedance spectrum (EIS), were used to evaluate the anodic behaviors of a ternary alloy of Ni_0.94Si_0.04Al _0.02 in molten NaOH at 773 K. The results revealed that a conductive passivation layer had formed during electrolysis, which protected the N _i0.94Si_0.04Al_0.02 substrate from further attacked. An in situ test of anodic gases using a mass spectra indicated that oxygen was emitted from the interface of the Ni_0.94Si _0.04Al_0.02 anode. Meanwhile, the iron sponge can be electrochemically produced when Fe₂O₃ is used as cathode. The significant result is that the Ni_0.94Si_0.04Al _0.02 alloy is promising as an inert anode in molten NaOH electrolyte for a green metallurgical process.

Original language	English
Pages (from-to)	148-152
Number of pages	5
Journal	Electrochimica Acta
Volume	87
DOIs	https://doi.org/10.1016/j.electacta.2012.09.044
Publication status	Published - 2013 Jan 1
Externally published	Yes

Keywords

Inert anode
Iron
Molten salts
Oxygen

ASJC Scopus subject areas

Chemical Engineering(all)
Electrochemistry

Access to Document

10.1016/j.electacta.2012.09.044

Cite this

@article{69ac07a63ec24b209a1373578143a3bf,

title = "Electrochemical reduction of iron oxide in molten sodium hydroxide based on a Ni0.94Si0.04Al0.02 metallic inert anode",

abstract = "Electrochemical tests, including anodic polarization, Tafel polarization and electrochemical impedance spectrum (EIS), were used to evaluate the anodic behaviors of a ternary alloy of Ni0.94Si0.04Al 0.02 in molten NaOH at 773 K. The results revealed that a conductive passivation layer had formed during electrolysis, which protected the N i0.94Si0.04Al0.02 substrate from further attacked. An in situ test of anodic gases using a mass spectra indicated that oxygen was emitted from the interface of the Ni0.94Si 0.04Al0.02 anode. Meanwhile, the iron sponge can be electrochemically produced when Fe2O3 is used as cathode. The significant result is that the Ni0.94Si0.04Al 0.02 alloy is promising as an inert anode in molten NaOH electrolyte for a green metallurgical process.",

keywords = "Inert anode, Iron, Molten salts, Oxygen",

author = "Shubo Wang and Jianbang Ge and Yuejiao Hu and Hongmin Zhu and Shuqiang Jiao",

note = "Funding Information: The work was supported by the Program for New Century Excellent Talents in University, Ministry of Education of China ( NCET-2011-0577 ) and the Fundamental Research Funds for the Central Universities ( FRF-TP-12-002B ).",

year = "2013",

month = jan,

day = "1",

doi = "10.1016/j.electacta.2012.09.044",

language = "English",

volume = "87",

pages = "148--152",

journal = "Electrochimica Acta",

issn = "0013-4686",

publisher = "Elsevier Limited",

}

TY - JOUR

T1 - Electrochemical reduction of iron oxide in molten sodium hydroxide based on a Ni0.94Si0.04Al0.02 metallic inert anode

AU - Wang, Shubo

AU - Ge, Jianbang

AU - Hu, Yuejiao

AU - Zhu, Hongmin

AU - Jiao, Shuqiang

N1 - Funding Information: The work was supported by the Program for New Century Excellent Talents in University, Ministry of Education of China ( NCET-2011-0577 ) and the Fundamental Research Funds for the Central Universities ( FRF-TP-12-002B ).

PY - 2013/1/1

Y1 - 2013/1/1

N2 - Electrochemical tests, including anodic polarization, Tafel polarization and electrochemical impedance spectrum (EIS), were used to evaluate the anodic behaviors of a ternary alloy of Ni0.94Si0.04Al 0.02 in molten NaOH at 773 K. The results revealed that a conductive passivation layer had formed during electrolysis, which protected the N i0.94Si0.04Al0.02 substrate from further attacked. An in situ test of anodic gases using a mass spectra indicated that oxygen was emitted from the interface of the Ni0.94Si 0.04Al0.02 anode. Meanwhile, the iron sponge can be electrochemically produced when Fe2O3 is used as cathode. The significant result is that the Ni0.94Si0.04Al 0.02 alloy is promising as an inert anode in molten NaOH electrolyte for a green metallurgical process.

AB - Electrochemical tests, including anodic polarization, Tafel polarization and electrochemical impedance spectrum (EIS), were used to evaluate the anodic behaviors of a ternary alloy of Ni0.94Si0.04Al 0.02 in molten NaOH at 773 K. The results revealed that a conductive passivation layer had formed during electrolysis, which protected the N i0.94Si0.04Al0.02 substrate from further attacked. An in situ test of anodic gases using a mass spectra indicated that oxygen was emitted from the interface of the Ni0.94Si 0.04Al0.02 anode. Meanwhile, the iron sponge can be electrochemically produced when Fe2O3 is used as cathode. The significant result is that the Ni0.94Si0.04Al 0.02 alloy is promising as an inert anode in molten NaOH electrolyte for a green metallurgical process.

KW - Inert anode

KW - Iron

KW - Molten salts

KW - Oxygen

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U2 - 10.1016/j.electacta.2012.09.044

DO - 10.1016/j.electacta.2012.09.044

M3 - Article

AN - SCOPUS:84870203120

VL - 87

SP - 148

EP - 152

JO - Electrochimica Acta

JF - Electrochimica Acta

SN - 0013-4686

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