Catalytic Properties of Free-Base Porphyrin Modified Graphite Electrodes for Electrochemical Water Splitting in Alkaline Medium
Abstract
1. Introduction
2. Materials and Methods
2.1. Materials and Reagents
2.2. Working Electrodes Preparation
2.3. Electrochemical Experiments
2.4. Physical-Chemical Characterizations
3. Results and Discussions
3.1. TEM/STEM Analysis of Porphyrin Specimens
3.2. OER and HER Electrocatalytic Properties of the Porphyrin Modified Electrodes
3.2.1. Studies in 0.1 M KOH Electrolyte Solution
3.2.2. OER Electrocatalytic Properties of the Porphyrin Modified Electrodes in 1 M KOH Solution
3.2.3. HER Electrocatalytic Properties of the Porphyrin Modified Electrodes in 1 M KOH Solution
3.3. SEM and Raman Characterizations
3.4. Further Considerations Regarding the GP3-BN-1 Electrode
4. Conclusions
Supplementary Materials
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Electrode Code | Porphyrin | Solvent | Porphyrin Layers | Electrode Code | Porphyrin | Solvent | Porphyrin Layers |
---|---|---|---|---|---|---|---|
GP1-DCM-1 | P1 | DCM | 1 | GP3-DCM-1 | P3 | DCM | 1 |
GP1-DCM-2 | 2 | GP3-DCM-2 | 2 | ||||
GP1-DCM-3 | 3 | GP3-DCM-3 | 3 | ||||
GP1-THF-1 | THF | 1 | GP3-THF-1 | THF | 1 | ||
GP1-THF-2 | 2 | GP3-THF-2 | 2 | ||||
GP1-THF-3 | 3 | GP3-THF-3 | 3 | ||||
GP1-BN-1 | BN | 1 | GP3-BN-1 | BN | 1 | ||
GP1-BN-2 | 2 | GP3-BN-2 | 2 | ||||
GP1-BN-3 | 3 | GP3-BN-3 | 3 | ||||
GP1-DMF-1 | DMF | 1 | GP4-DCM-1 | P4 | DCM | 1 | |
GP1-DMF-2 | 2 | GP4-DCM-2 | 2 | ||||
GP1-DMF-3 | 3 | GP4-DCM-3 | 3 | ||||
GP2-DCM-1 | P2 | DCM | 1 | GP4-THF-1 | THF | 1 | |
GP2-DCM-2 | 2 | GP4-THF-2 | 2 | ||||
GP2-DCM-3 | 3 | GP4-THF-3 | 3 | ||||
GP2-THF-1 | THF | 1 | GP4-BN-1 | BN | 1 | ||
GP2-THF-2 | 2 | GP4-BN-2 | 2 | ||||
GP2-THF-3 | 3 | GP4-BN-3 | 3 | ||||
GP2-BN-1 | BN | 1 | |||||
GP2-BN-2 | 2 | ||||||
GP2-BN-3 | 3 |
Electrode | ηH2 [mV] at i = −10 mA/cm2 | Tafel Slope [mV/dec] | Reference |
---|---|---|---|
Porous channel-rich carbon nanofibers on GC | ~690 | - | [74] |
Multi-walled CNTs on GC | 900 | - | [75] |
N-doped graphene microtubes on GC | 432 | 116.7 | [76] |
Porous graphite carbon doped with N, P and O on oxidized carbon fiber cloth | 446 | 154 | [77] |
Pristine graphene on GC | ~575 | 189 | [78] |
N-doped graphene on GC | ~550 | 152 | [78] |
Graphene with carbon defects on GC | 320 | 118 | [78] |
Oxidized CNTs on GC | 670 | 187 | [79] |
Oxidized CNTs and polydopamine hybrid material on GC | >700 | 178 | [79] |
N-doped CNTs on GC | 620 | 187 | [79] |
N,S-doped CNTs on GC | 450 | 133 | [79] |
N,S co-doped graphitic sheets with stereoscopic holes on GC | ~270 | - | [80] |
GP3-BN-1 | 500 | 190 | This work |
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Taranu, B.-O.; Fagadar-Cosma, E. Catalytic Properties of Free-Base Porphyrin Modified Graphite Electrodes for Electrochemical Water Splitting in Alkaline Medium. Processes 2022, 10, 611. https://doi.org/10.3390/pr10030611
Taranu B-O, Fagadar-Cosma E. Catalytic Properties of Free-Base Porphyrin Modified Graphite Electrodes for Electrochemical Water Splitting in Alkaline Medium. Processes. 2022; 10(3):611. https://doi.org/10.3390/pr10030611
Chicago/Turabian StyleTaranu, Bogdan-Ovidiu, and Eugenia Fagadar-Cosma. 2022. "Catalytic Properties of Free-Base Porphyrin Modified Graphite Electrodes for Electrochemical Water Splitting in Alkaline Medium" Processes 10, no. 3: 611. https://doi.org/10.3390/pr10030611
APA StyleTaranu, B.-O., & Fagadar-Cosma, E. (2022). Catalytic Properties of Free-Base Porphyrin Modified Graphite Electrodes for Electrochemical Water Splitting in Alkaline Medium. Processes, 10(3), 611. https://doi.org/10.3390/pr10030611