dc.contributor.author |
Matseke, Mphoma S
|
|
dc.contributor.author |
Luo, Hongze
|
|
dc.contributor.author |
Wen, L
|
|
dc.contributor.author |
Zheng, Haito
|
|
dc.date.accessioned |
2023-04-18T06:49:25Z |
|
dc.date.available |
2023-04-18T06:49:25Z |
|
dc.date.issued |
2022-06 |
|
dc.identifier.citation |
Matseke, M.S., Luo, H., Wen, L. & Zheng, H. 2022. The upgraded performance of the NiFe2O4 /C electrocatalyst using Co substitution for the oxygen reduction reaction in an alkaline solution. <i>Journal of Physics and Chemistry of Solids, 165.</i> http://hdl.handle.net/10204/12755 |
en_ZA |
dc.identifier.issn |
0022-3697 |
|
dc.identifier.issn |
1879-2553 |
|
dc.identifier.uri |
https://doi.org/10.1016/j.jpcs.2022.110644
|
|
dc.identifier.uri |
http://hdl.handle.net/10204/12755
|
|
dc.description.abstract |
NiFe2O4 is one of the most abundant and inexpensive spinels; however, its activity toward the oxygen reduction reaction (ORR) is relatively low. For the first time, Co-substituted Fe partly of the NiFe2O4 electrocatalyst was studied to improve the intrinsic activity of ORR. Spinel-type NiFe2-xCoxO4/C electrocatalysts (x = 0, 0.25, 0.5 and 0.75) were synthesized by the hydrothermal method without further calcination. The well-crystallized NiFe2O4/C nanoparticles remained in a single phase after Co-substituting with sizes of 15–20 nm, characterized by TEM, SEM, XRD, and FTIR. XPS observes mixed valence states in the NiFe2-xCoxO4/C structure are observed, which has a beneficial effect on ORR. Furthermore, NiFe2-xCoxO4/C nanoparticles (x = 0.25, 0.5 and 0.75) show advanced ORR performance over NiFe2O4, particularly, the specific mass activity of NiFe1.75Co0.25O4/C is three times higher than that of NiFe2O4, also, with improved stability. After 4,000s, the NiFe1.75Co0.25O4/C electrocatalyst retained 84% of its initial current density, while the NiFe2O4/C electrocatalyst retained only 38%. The results revealed that Co substitutions have remarkably increased the intrinsic activity of the NiFe2O4 electrocatalyst for ORR by altering the structure, redistributing cations, and improving electrical conductivity. |
en_US |
dc.format |
Abstract |
en_US |
dc.language.iso |
en |
en_US |
dc.relation.uri |
https://www.sciencedirect.com/science/article/pii/S0022369722000725 |
en_US |
dc.source |
Journal of Physics and Chemistry of Solids, 165 |
en_US |
dc.subject |
Co-substituted Fe |
en_US |
dc.subject |
NiFe2O4 |
en_US |
dc.subject |
Oxygen reduction reaction |
en_US |
dc.subject |
ORR |
en_US |
dc.subject |
Spinel |
en_US |
dc.title |
The upgraded performance of the NiFe2O4 /C electrocatalyst using Co substitution for the oxygen reduction reaction in an alkaline solution |
en_US |
dc.type |
Article |
en_US |
dc.description.pages |
7pp |
en_US |
dc.description.note |
© 2022 Elsevier Ltd. All rights reserved. Due to copyright restrictions, the attached PDF file only contains the abstract of the full text item. For access to the full text item, please consult the publisher's website: https://www.sciencedirect.com/science/article/pii/S0022369722000725 |
en_US |
dc.description.cluster |
Smart Places |
en_US |
dc.description.impactarea |
Electrochemical Energy |
en_US |
dc.identifier.apacitation |
Matseke, M. S., Luo, H., Wen, L., & Zheng, H. (2022). The upgraded performance of the NiFe2O4 /C electrocatalyst using Co substitution for the oxygen reduction reaction in an alkaline solution. <i>Journal of Physics and Chemistry of Solids, 165</i>, http://hdl.handle.net/10204/12755 |
en_ZA |
dc.identifier.chicagocitation |
Matseke, Mphoma S, Hongze Luo, L Wen, and Haito Zheng "The upgraded performance of the NiFe2O4 /C electrocatalyst using Co substitution for the oxygen reduction reaction in an alkaline solution." <i>Journal of Physics and Chemistry of Solids, 165</i> (2022) http://hdl.handle.net/10204/12755 |
en_ZA |
dc.identifier.vancouvercitation |
Matseke MS, Luo H, Wen L, Zheng H. The upgraded performance of the NiFe2O4 /C electrocatalyst using Co substitution for the oxygen reduction reaction in an alkaline solution. Journal of Physics and Chemistry of Solids, 165. 2022; http://hdl.handle.net/10204/12755. |
en_ZA |
dc.identifier.ris |
TY - Article
AU - Matseke, Mphoma S
AU - Luo, Hongze
AU - Wen, L
AU - Zheng, Haito
AB - NiFe2O4 is one of the most abundant and inexpensive spinels; however, its activity toward the oxygen reduction reaction (ORR) is relatively low. For the first time, Co-substituted Fe partly of the NiFe2O4 electrocatalyst was studied to improve the intrinsic activity of ORR. Spinel-type NiFe2-xCoxO4/C electrocatalysts (x = 0, 0.25, 0.5 and 0.75) were synthesized by the hydrothermal method without further calcination. The well-crystallized NiFe2O4/C nanoparticles remained in a single phase after Co-substituting with sizes of 15–20 nm, characterized by TEM, SEM, XRD, and FTIR. XPS observes mixed valence states in the NiFe2-xCoxO4/C structure are observed, which has a beneficial effect on ORR. Furthermore, NiFe2-xCoxO4/C nanoparticles (x = 0.25, 0.5 and 0.75) show advanced ORR performance over NiFe2O4, particularly, the specific mass activity of NiFe1.75Co0.25O4/C is three times higher than that of NiFe2O4, also, with improved stability. After 4,000s, the NiFe1.75Co0.25O4/C electrocatalyst retained 84% of its initial current density, while the NiFe2O4/C electrocatalyst retained only 38%. The results revealed that Co substitutions have remarkably increased the intrinsic activity of the NiFe2O4 electrocatalyst for ORR by altering the structure, redistributing cations, and improving electrical conductivity.
DA - 2022-06
DB - ResearchSpace
DP - CSIR
J1 - Journal of Physics and Chemistry of Solids, 165
KW - Co-substituted Fe
KW - NiFe2O4
KW - Oxygen reduction reaction
KW - ORR
KW - Spinel
LK - https://researchspace.csir.co.za
PY - 2022
SM - 0022-3697
SM - 1879-2553
T1 - The upgraded performance of the NiFe2O4 /C electrocatalyst using Co substitution for the oxygen reduction reaction in an alkaline solution
TI - The upgraded performance of the NiFe2O4 /C electrocatalyst using Co substitution for the oxygen reduction reaction in an alkaline solution
UR - http://hdl.handle.net/10204/12755
ER -
|
en_ZA |
dc.identifier.worklist |
26453 |
en_US |