| Full text | |
| Author(s): |
Total Authors: 4
|
| Affiliation: | [1] Univ Sao Paulo, Sao Carlos Inst Chem, BR-13560970 Sao Carlos, SP - Brazil
[2] Argonne Natl Lab, Mat Sci Div, Lemont, IL 60439 - USA
Total Affiliations: 2
|
| Document type: | Journal article |
| Source: | Electrochemistry Communications; v. 121, DEC 2020. |
| Web of Science Citations: | 0 |
| Abstract | |
Some electrochemical systems are known to have higher average efficiency when operated under an oscillatory regime. Given the compromise between activity and stability, the stability of electrochemical interfaces in a self-organized, oscillatory state must be taken into account. Here we evaluate the electro-oxidation of methanol and formic acid on platinum under regular and oscillatory conditions, and study the stability by following the Pt dissolution rates in situ with a stationary probe rotating disk electrode (SPRDE) coupled to an inductively coupled plasma mass spectrometer (ICP-MS). Generally speaking, as the electro-oxidation reaction proceeds, the platinum dissolution rate increases considerably. To guarantee Pt stability, the potential must be kept below 1.0 V vs. RHE. Interestingly, no dissolution is detectable when the electrode potential undergoes temporary self-organization, ensuring a stable and active interface. (AU) | |
| FAPESP's process: | 14/50279-4 - Brasil Research Centre for Gas Innovation |
| Grantee: | Julio Romano Meneghini |
| Support Opportunities: | Research Grants - Research Centers in Engineering Program |
| FAPESP's process: | 17/17644-9 - Stability of electrocatalysts towards the electro-oxidation of organic molecules |
| Grantee: | Jéssica Alves Nogueira |
| Support Opportunities: | Scholarships abroad - Research Internship - Doctorate |
| FAPESP's process: | 15/09295-9 - Dynamic behavior in low-temperature fuel cells based on oxidation of small organic molecules |
| Grantee: | Jéssica Alves Nogueira |
| Support Opportunities: | Scholarships in Brazil - Doctorate |
| FAPESP's process: | 13/16930-7 - Electrocatalysis V: electrocatalytic processes of chemical and electrical energy interconversion |
| Grantee: | Edson Antonio Ticianelli |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 19/22183-6 - Electrocatalysis VI: fundamental and applied aspects of emerging and classical problems in electrochemical energy conversion |
| Grantee: | Edson Antonio Ticianelli |
| Support Opportunities: | Research Projects - Thematic Grants |