Electrochemical stability and degradation of commercial Rh/C catalyst in acidic media
Samo za registrovane korisnike
2021
Autori
Smiljanić, Milutin Lj.Bele, Marjan
Ruiz-Zepeda, Francisco
Šala, Martin
Kroflič, Ana
Hodnik, Nejc
Članak u časopisu (Objavljena verzija)
Metapodaci
Prikaz svih podataka o dokumentuApstrakt
Electrochemical stability of a commercial Rh/C catalyst has been studied in an acidic electrolyte by accelerated degradation protocols (ADP) which involved 5000 rapid voltammetric scans (1 V/s) in two potential regions: ADP1 was performed between 0.4 VRHE and 1.4 VRHE, while ADP2 was performed between 0.05 VRHE and 1.4 VRHE. Degradation of Rh/C was monitored by the changes in Rh electrochemical surface area (ECSA) and electrocatalytic activity for hydrogen evolution (HER) and oxygen reduction (ORR). Rh/C catalyst was particularly stable during ADP1 showing only a minor loss of ECSA, while its electrocatalytic activity for HER and ORR was practically unaffected, which was further corroborated with identical location SEM (IL-SEM) imaging. In the case of ADP2, severe degradation of Rh/C occurred followed by substantial decay in its electrocatalytic activity. Coupling of the electrochemical flow cell (EFC) with ICP-MS revealed much higher Rh dissolution in ADP2 than in ADP1. IL-SEM in comb...ination with ex-situ TEM imaging showed that degradation of the Rh/C sample is not homogeneous during ADP2, as dissolution prevails on certain locations, while dissolution followed by re-deposition occurs on others. According to the results obtained in this work, Rh/C catalysts are exceptionally sensitive to the sudden potential jumps between particularly low and high values.
Ključne reči:
Catalyst degradation / ICP-MS / Identical location SEM / Rhodium nanoparticles / TEMIzvor:
Electrochimica Acta, 2021, 400, 139435-Finansiranje / projekti:
- NATO Science for Peace and Security Programme under grant G5729
- Ministry of Education, Science and Sport of the Republic of Slovenia through Raziskovalci [2.1-KI952007]
- Slovenian Research Agency [P1-0034, P2-0393, N2-0106]
DOI: 10.1016/j.electacta.2021.139435
ISSN: 0013-4686
WoS: 000718159300006
Scopus: 2-s2.0-85118196319
Kolekcije
Institucija/grupa
VinčaTY - JOUR AU - Smiljanić, Milutin Lj. AU - Bele, Marjan AU - Ruiz-Zepeda, Francisco AU - Šala, Martin AU - Kroflič, Ana AU - Hodnik, Nejc PY - 2021 UR - https://vinar.vin.bg.ac.rs/handle/123456789/9979 AB - Electrochemical stability of a commercial Rh/C catalyst has been studied in an acidic electrolyte by accelerated degradation protocols (ADP) which involved 5000 rapid voltammetric scans (1 V/s) in two potential regions: ADP1 was performed between 0.4 VRHE and 1.4 VRHE, while ADP2 was performed between 0.05 VRHE and 1.4 VRHE. Degradation of Rh/C was monitored by the changes in Rh electrochemical surface area (ECSA) and electrocatalytic activity for hydrogen evolution (HER) and oxygen reduction (ORR). Rh/C catalyst was particularly stable during ADP1 showing only a minor loss of ECSA, while its electrocatalytic activity for HER and ORR was practically unaffected, which was further corroborated with identical location SEM (IL-SEM) imaging. In the case of ADP2, severe degradation of Rh/C occurred followed by substantial decay in its electrocatalytic activity. Coupling of the electrochemical flow cell (EFC) with ICP-MS revealed much higher Rh dissolution in ADP2 than in ADP1. IL-SEM in combination with ex-situ TEM imaging showed that degradation of the Rh/C sample is not homogeneous during ADP2, as dissolution prevails on certain locations, while dissolution followed by re-deposition occurs on others. According to the results obtained in this work, Rh/C catalysts are exceptionally sensitive to the sudden potential jumps between particularly low and high values. T2 - Electrochimica Acta T1 - Electrochemical stability and degradation of commercial Rh/C catalyst in acidic media VL - 400 SP - 139435 DO - 10.1016/j.electacta.2021.139435 ER -
@article{ author = "Smiljanić, Milutin Lj. and Bele, Marjan and Ruiz-Zepeda, Francisco and Šala, Martin and Kroflič, Ana and Hodnik, Nejc", year = "2021", abstract = "Electrochemical stability of a commercial Rh/C catalyst has been studied in an acidic electrolyte by accelerated degradation protocols (ADP) which involved 5000 rapid voltammetric scans (1 V/s) in two potential regions: ADP1 was performed between 0.4 VRHE and 1.4 VRHE, while ADP2 was performed between 0.05 VRHE and 1.4 VRHE. Degradation of Rh/C was monitored by the changes in Rh electrochemical surface area (ECSA) and electrocatalytic activity for hydrogen evolution (HER) and oxygen reduction (ORR). Rh/C catalyst was particularly stable during ADP1 showing only a minor loss of ECSA, while its electrocatalytic activity for HER and ORR was practically unaffected, which was further corroborated with identical location SEM (IL-SEM) imaging. In the case of ADP2, severe degradation of Rh/C occurred followed by substantial decay in its electrocatalytic activity. Coupling of the electrochemical flow cell (EFC) with ICP-MS revealed much higher Rh dissolution in ADP2 than in ADP1. IL-SEM in combination with ex-situ TEM imaging showed that degradation of the Rh/C sample is not homogeneous during ADP2, as dissolution prevails on certain locations, while dissolution followed by re-deposition occurs on others. According to the results obtained in this work, Rh/C catalysts are exceptionally sensitive to the sudden potential jumps between particularly low and high values.", journal = "Electrochimica Acta", title = "Electrochemical stability and degradation of commercial Rh/C catalyst in acidic media", volume = "400", pages = "139435", doi = "10.1016/j.electacta.2021.139435" }
Smiljanić, M. Lj., Bele, M., Ruiz-Zepeda, F., Šala, M., Kroflič, A.,& Hodnik, N.. (2021). Electrochemical stability and degradation of commercial Rh/C catalyst in acidic media. in Electrochimica Acta, 400, 139435. https://doi.org/10.1016/j.electacta.2021.139435
Smiljanić ML, Bele M, Ruiz-Zepeda F, Šala M, Kroflič A, Hodnik N. Electrochemical stability and degradation of commercial Rh/C catalyst in acidic media. in Electrochimica Acta. 2021;400:139435. doi:10.1016/j.electacta.2021.139435 .
Smiljanić, Milutin Lj., Bele, Marjan, Ruiz-Zepeda, Francisco, Šala, Martin, Kroflič, Ana, Hodnik, Nejc, "Electrochemical stability and degradation of commercial Rh/C catalyst in acidic media" in Electrochimica Acta, 400 (2021):139435, https://doi.org/10.1016/j.electacta.2021.139435 . .