Electrochemical Stability and Degradation Mechanisms of Commercial Carbon-Supported Gold Nanoparticles in Acidic Media
Аутори
Smiljanić, Milutin Lj.Petek, Urša
Bele, Marjan
Ruiz-Zepeda, Francisco
Šala, Martin
Jovanovič, Primož
Gaberšček, Miran
Hodnik, Nejc
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
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 con...tribution 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.
Извор:
The Journal of Physical Chemistry C, 2021, 125, 1, 635-647Финансирање / пројекти:
- Ministry of Education, Science, and Sport of the Republic of Slovenia [Raziskovalci-2.1-KI-952007]
- Ministry of Education, Science, and Sport of the Republic of Slovenia [ERA-MIN2 RedOxRec]
- Slovenian Research Agency [P1-0034]
- Slovenian Research Agency [P2-0393]
- Slovenian Research Agency [N2-0106]
- NATO Science for Peace and Security Programme [G5729]
- European Union's Horizon Research and Innovation Program [852208]
DOI: 10.1021/acs.jpcc.0c10033
ISSN: 1932-7447
PubMed: 33488908
WoS: 000611410300065
Scopus: 2-s2.0-85099650590
Институција/група
VinčaTY - 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 . .