TY  - JOUR
AU  - Smiljanić, Milutin Lj.
AU  - Bele, Marjan
AU  - Moriau, Leonard
AU  - Ruiz-Zepeda, Francisco
AU  - Šala, Martin
AU  - Hodnik, Nejc
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10103
AB  - Palladium has attracted significant attention as a catalyst or co-catalyst for many electrochemical reactions in energy conversion devices. We have studied electrochemical stability of a commercial Pd/C sample in an acidic electrolyte by exposing it to an accelerated stress test (AST) to mimic potential spikes in fuel cells and electrolyzers during start/stop events. AST consisted of extensive rapid potential cycling (5000 cycles, 1 V/s) in two potential regions, namely AST1 was performed between 0.4 and 1.4 VRHE, while AST2 was performed between 0.05 and 1.4 VRHE. Degradation of Pd/C was monitored by the changes in Pd electrochemical surface area, while the hydrogen evolution reaction (HER) was used as a test reaction to observe the corresponding impact of the degradation on the activity of Pd/C. Significant Pd/C degradation and HER activity loss were observed in both potential regions. Coupling of the electrochemical flow cell with an inductively coupled plasma mass spectrometry device showed substantial Pd dissolution during both ASTs. Identical location scanning electron microscopy revealed that Pd dissolution is followed by redeposition during both ASTs, resulting in particle size growth. Particle size growth was seen as especially dramatic in the case of AST2, when particularly large Pd nanostructures were obtained on top of the catalyst layer. According to the results presented in this work, (in)stability of Pd/C and other Pd-based nanocatalysts should be studied systematically as it may present a key factor limiting their application in energy conversion devices.
T2  - The Journal of Physical Chemistry C
T1  - Electrochemical Stability and Degradation of Commercial Pd/C Catalyst in Acidic Media
VL  - 125
IS  - 50
SP  - 27534
EP  - 27542
DO  - 10.1021/acs.jpcc.1c08496
ER  - 

@article{
author = "Smiljanić, Milutin Lj. and Bele, Marjan and Moriau, Leonard and Ruiz-Zepeda, Francisco and Šala, Martin and Hodnik, Nejc",
year = "2021",
abstract = "Palladium has attracted significant attention as a catalyst or co-catalyst for many electrochemical reactions in energy conversion devices. We have studied electrochemical stability of a commercial Pd/C sample in an acidic electrolyte by exposing it to an accelerated stress test (AST) to mimic potential spikes in fuel cells and electrolyzers during start/stop events. AST consisted of extensive rapid potential cycling (5000 cycles, 1 V/s) in two potential regions, namely AST1 was performed between 0.4 and 1.4 VRHE, while AST2 was performed between 0.05 and 1.4 VRHE. Degradation of Pd/C was monitored by the changes in Pd electrochemical surface area, while the hydrogen evolution reaction (HER) was used as a test reaction to observe the corresponding impact of the degradation on the activity of Pd/C. Significant Pd/C degradation and HER activity loss were observed in both potential regions. Coupling of the electrochemical flow cell with an inductively coupled plasma mass spectrometry device showed substantial Pd dissolution during both ASTs. Identical location scanning electron microscopy revealed that Pd dissolution is followed by redeposition during both ASTs, resulting in particle size growth. Particle size growth was seen as especially dramatic in the case of AST2, when particularly large Pd nanostructures were obtained on top of the catalyst layer. According to the results presented in this work, (in)stability of Pd/C and other Pd-based nanocatalysts should be studied systematically as it may present a key factor limiting their application in energy conversion devices.",
journal = "The Journal of Physical Chemistry C",
title = "Electrochemical Stability and Degradation of Commercial Pd/C Catalyst in Acidic Media",
volume = "125",
number = "50",
pages = "27534-27542",
doi = "10.1021/acs.jpcc.1c08496"
}

Smiljanić, M. Lj., Bele, M., Moriau, L., Ruiz-Zepeda, F., Šala, M.,& Hodnik, N.. (2021). Electrochemical Stability and Degradation of Commercial Pd/C Catalyst in Acidic Media. in The Journal of Physical Chemistry C, 125(50), 27534-27542.
https://doi.org/10.1021/acs.jpcc.1c08496

Smiljanić ML, Bele M, Moriau L, Ruiz-Zepeda F, Šala M, Hodnik N. Electrochemical Stability and Degradation of Commercial Pd/C Catalyst in Acidic Media. in The Journal of Physical Chemistry C. 2021;125(50):27534-27542.
doi:10.1021/acs.jpcc.1c08496 .

Smiljanić, Milutin Lj., Bele, Marjan, Moriau, Leonard, Ruiz-Zepeda, Francisco, Šala, Martin, Hodnik, Nejc, "Electrochemical Stability and Degradation of Commercial Pd/C Catalyst in Acidic Media" in The Journal of Physical Chemistry C, 125, no. 50 (2021):27534-27542,
https://doi.org/10.1021/acs.jpcc.1c08496 . .