TY  - JOUR
AU  - Smiljanić, Milutin Lj.
AU  - Petek, Urša
AU  - Bele, Marjan
AU  - Ruiz-Zepeda, Francisco
AU  - Šala, Martin
AU  - Jovanovič, Primož
AU  - Gaberšček, Miran
AU  - Hodnik, Nejc
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9548
AB  - Electrochemical stability of a commercial Au/C catalyst in an acidic electrolyte has been investigated by an accelerated stress test (AST), which consisted of 10,000 voltammetric scans (1 V/s) in the potential range between 0.58 and 1.41 VRHE. Loss of Au electrochemical surface area (ESA) during the AST pointed out to the degradation of Au/C. Coupling of an electrochemical flow cell with ICP-MS showed that only a minor amount of gold is dissolved despite the substantial loss of gold ESA during the AST (∼35% of initial value remains at the end of the AST). According to the electrochemical mass spectrometry experiments, carbon corrosion occurs during the AST but to a minor extent. By using identical location scanning electron microscopy and identical location transmission electron microscopy, it was possible to discern that the dissolution of small Au particles (<5 nm) within the polydisperse Au/C sample is the main degradation mechanism. The mass of such particles gives only a minor contribution to the overall Au mass of the polydisperse sample while giving a major contribution to the overall ESA, which explains a significant loss of ESA and minor loss of mass during the AST. The addition of low amounts of chloride anions (10-4 M) substantially promoted the degradation of gold nanoparticles. At an even higher concentration of chlorides (10-2 M), the dissolution of gold was rather effective, which is useful from the recycling point of view when rapid leaching of gold is desirable. © 2021 American Chemical Society.
T2  - The Journal of Physical Chemistry C
T1  - Electrochemical Stability and Degradation Mechanisms of Commercial Carbon-Supported Gold Nanoparticles in Acidic Media
VL  - 125
IS  - 1
SP  - 635
EP  - 647
DO  - 10.1021/acs.jpcc.0c10033
ER  - 

@article{
author = "Smiljanić, Milutin Lj. and Petek, Urša and Bele, Marjan and Ruiz-Zepeda, Francisco and Šala, Martin and Jovanovič, Primož and Gaberšček, Miran and Hodnik, Nejc",
year = "2021",
abstract = "Electrochemical stability of a commercial Au/C catalyst in an acidic electrolyte has been investigated by an accelerated stress test (AST), which consisted of 10,000 voltammetric scans (1 V/s) in the potential range between 0.58 and 1.41 VRHE. Loss of Au electrochemical surface area (ESA) during the AST pointed out to the degradation of Au/C. Coupling of an electrochemical flow cell with ICP-MS showed that only a minor amount of gold is dissolved despite the substantial loss of gold ESA during the AST (∼35% of initial value remains at the end of the AST). According to the electrochemical mass spectrometry experiments, carbon corrosion occurs during the AST but to a minor extent. By using identical location scanning electron microscopy and identical location transmission electron microscopy, it was possible to discern that the dissolution of small Au particles (<5 nm) within the polydisperse Au/C sample is the main degradation mechanism. The mass of such particles gives only a minor contribution to the overall Au mass of the polydisperse sample while giving a major contribution to the overall ESA, which explains a significant loss of ESA and minor loss of mass during the AST. The addition of low amounts of chloride anions (10-4 M) substantially promoted the degradation of gold nanoparticles. At an even higher concentration of chlorides (10-2 M), the dissolution of gold was rather effective, which is useful from the recycling point of view when rapid leaching of gold is desirable. © 2021 American Chemical Society.",
journal = "The Journal of Physical Chemistry C",
title = "Electrochemical Stability and Degradation Mechanisms of Commercial Carbon-Supported Gold Nanoparticles in Acidic Media",
volume = "125",
number = "1",
pages = "635-647",
doi = "10.1021/acs.jpcc.0c10033"
}

Smiljanić, M. Lj., Petek, U., Bele, M., Ruiz-Zepeda, F., Šala, M., Jovanovič, P., Gaberšček, M.,& Hodnik, N.. (2021). Electrochemical Stability and Degradation Mechanisms of Commercial Carbon-Supported Gold Nanoparticles in Acidic Media. in The Journal of Physical Chemistry C, 125(1), 635-647.
https://doi.org/10.1021/acs.jpcc.0c10033

Smiljanić ML, Petek U, Bele M, Ruiz-Zepeda F, Šala M, Jovanovič P, Gaberšček M, Hodnik N. Electrochemical Stability and Degradation Mechanisms of Commercial Carbon-Supported Gold Nanoparticles in Acidic Media. in The Journal of Physical Chemistry C. 2021;125(1):635-647.
doi:10.1021/acs.jpcc.0c10033 .

Smiljanić, Milutin Lj., Petek, Urša, Bele, Marjan, Ruiz-Zepeda, Francisco, Šala, Martin, Jovanovič, Primož, Gaberšček, Miran, Hodnik, Nejc, "Electrochemical Stability and Degradation Mechanisms of Commercial Carbon-Supported Gold Nanoparticles in Acidic Media" in The Journal of Physical Chemistry C, 125, no. 1 (2021):635-647,
https://doi.org/10.1021/acs.jpcc.0c10033 . .