Determination of Activation Energy on Hydrogen Evolution Reaction for Nickel-Based Porous Electrodes during Alkaline Electrolysis
The aim of the present work is to evaluate the activation energy (Ea) at different cathodic overpotentials (η) by potentiodynamic tests which were carried out at different temperatures of Ni-based, NiCr-m, and NiCr-p porous electrodes, during the alkaline electrolysis processes. On the other hand, t...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-03-01
|
| Series: | Catalysts |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4344/13/3/517 |
| _version_ | 1797612939041046528 |
|---|---|
| author | Melina Velasco-Plascencia Octavio Vázquez-Gómez Luis Olmos Francisco Reyes-Calderón Héctor J. Vergara-Hernández Julio C. Villalobos |
| author_facet | Melina Velasco-Plascencia Octavio Vázquez-Gómez Luis Olmos Francisco Reyes-Calderón Héctor J. Vergara-Hernández Julio C. Villalobos |
| author_sort | Melina Velasco-Plascencia |
| collection | DOAJ |
| description | The aim of the present work is to evaluate the activation energy (Ea) at different cathodic overpotentials (η) by potentiodynamic tests which were carried out at different temperatures of Ni-based, NiCr-m, and NiCr-p porous electrodes, during the alkaline electrolysis processes. On the other hand, the electrochemical stability of the electrodes was evaluated by cyclic voltammetry after 1000 cycles of operation and by potentiostatic tests after 10 h at −1.5 V vs. SCE. The electrodes were sintered with a heating rate of 25 °C/min up to a temperature of 1000 °C (Ni-based and NiCr-m) and 1200 °C (NiCr-p) for 60 min. The results showed that the Ea value was lower for the Ni-based system at equilibrium; however, the NiCr-p electrode had a better performance due to higher negative apparent Ea values as a function of η (dEa/dη). The cyclic voltammetry tests suggest that the NiCr-p electrode improves its activity by about 71% in its long-term operation in comparison with Ni-based and NiCr-m. A similar behavior was observed in the potentiostatic test which showed a higher cathodic current density associated with a charge transfer process after 10 h. The higher stability of the NiCr-p is attributed to a homogeneous Cr distribution in the nickel matrix. |
| first_indexed | 2024-03-11T06:47:56Z |
| format | Article |
| id | doaj.art-bcc97aa48fd14e42b1f785a18ab83900 |
| institution | Directory Open Access Journal |
| issn | 2073-4344 |
| language | English |
| last_indexed | 2024-03-11T06:47:56Z |
| publishDate | 2023-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Catalysts |
| spelling | doaj.art-bcc97aa48fd14e42b1f785a18ab839002023-11-17T10:10:32ZengMDPI AGCatalysts2073-43442023-03-0113351710.3390/catal13030517Determination of Activation Energy on Hydrogen Evolution Reaction for Nickel-Based Porous Electrodes during Alkaline ElectrolysisMelina Velasco-Plascencia0Octavio Vázquez-Gómez1Luis Olmos2Francisco Reyes-Calderón3Héctor J. Vergara-Hernández4Julio C. Villalobos5Tecnológico Nacional de México/Instituto Tecnológico de Morelia, Avenida Tecnológico No. 1500, Lomas de Santiaguito, Morelia 58120, MexicoTecnológico Nacional de México/Instituto Tecnológico de Morelia, Avenida Tecnológico No. 1500, Lomas de Santiaguito, Morelia 58120, MexicoINICIT, Universidad Michoacana de San Nicolás de Hidalgo, Avenida Francisco J. Múgica S/N Ciudad Universitaria, Morelia 58040, MexicoTecnológico Nacional de México/Instituto Tecnológico de Morelia, Avenida Tecnológico No. 1500, Lomas de Santiaguito, Morelia 58120, MexicoTecnológico Nacional de México/Instituto Tecnológico de Morelia, Avenida Tecnológico No. 1500, Lomas de Santiaguito, Morelia 58120, MexicoTecnológico Nacional de México/Instituto Tecnológico de Morelia, Avenida Tecnológico No. 1500, Lomas de Santiaguito, Morelia 58120, MexicoThe aim of the present work is to evaluate the activation energy (Ea) at different cathodic overpotentials (η) by potentiodynamic tests which were carried out at different temperatures of Ni-based, NiCr-m, and NiCr-p porous electrodes, during the alkaline electrolysis processes. On the other hand, the electrochemical stability of the electrodes was evaluated by cyclic voltammetry after 1000 cycles of operation and by potentiostatic tests after 10 h at −1.5 V vs. SCE. The electrodes were sintered with a heating rate of 25 °C/min up to a temperature of 1000 °C (Ni-based and NiCr-m) and 1200 °C (NiCr-p) for 60 min. The results showed that the Ea value was lower for the Ni-based system at equilibrium; however, the NiCr-p electrode had a better performance due to higher negative apparent Ea values as a function of η (dEa/dη). The cyclic voltammetry tests suggest that the NiCr-p electrode improves its activity by about 71% in its long-term operation in comparison with Ni-based and NiCr-m. A similar behavior was observed in the potentiostatic test which showed a higher cathodic current density associated with a charge transfer process after 10 h. The higher stability of the NiCr-p is attributed to a homogeneous Cr distribution in the nickel matrix.https://www.mdpi.com/2073-4344/13/3/517Hydrogen evolution reactionNi-based electrodepowder metallurgy |
| spellingShingle | Melina Velasco-Plascencia Octavio Vázquez-Gómez Luis Olmos Francisco Reyes-Calderón Héctor J. Vergara-Hernández Julio C. Villalobos Determination of Activation Energy on Hydrogen Evolution Reaction for Nickel-Based Porous Electrodes during Alkaline Electrolysis Catalysts Hydrogen evolution reaction Ni-based electrode powder metallurgy |
| title | Determination of Activation Energy on Hydrogen Evolution Reaction for Nickel-Based Porous Electrodes during Alkaline Electrolysis |
| title_full | Determination of Activation Energy on Hydrogen Evolution Reaction for Nickel-Based Porous Electrodes during Alkaline Electrolysis |
| title_fullStr | Determination of Activation Energy on Hydrogen Evolution Reaction for Nickel-Based Porous Electrodes during Alkaline Electrolysis |
| title_full_unstemmed | Determination of Activation Energy on Hydrogen Evolution Reaction for Nickel-Based Porous Electrodes during Alkaline Electrolysis |
| title_short | Determination of Activation Energy on Hydrogen Evolution Reaction for Nickel-Based Porous Electrodes during Alkaline Electrolysis |
| title_sort | determination of activation energy on hydrogen evolution reaction for nickel based porous electrodes during alkaline electrolysis |
| topic | Hydrogen evolution reaction Ni-based electrode powder metallurgy |
| url | https://www.mdpi.com/2073-4344/13/3/517 |
| work_keys_str_mv | AT melinavelascoplascencia determinationofactivationenergyonhydrogenevolutionreactionfornickelbasedporouselectrodesduringalkalineelectrolysis AT octaviovazquezgomez determinationofactivationenergyonhydrogenevolutionreactionfornickelbasedporouselectrodesduringalkalineelectrolysis AT luisolmos determinationofactivationenergyonhydrogenevolutionreactionfornickelbasedporouselectrodesduringalkalineelectrolysis AT franciscoreyescalderon determinationofactivationenergyonhydrogenevolutionreactionfornickelbasedporouselectrodesduringalkalineelectrolysis AT hectorjvergarahernandez determinationofactivationenergyonhydrogenevolutionreactionfornickelbasedporouselectrodesduringalkalineelectrolysis AT juliocvillalobos determinationofactivationenergyonhydrogenevolutionreactionfornickelbasedporouselectrodesduringalkalineelectrolysis |