Electrochemical dissolution of PtRu/C: Effect of potential, fuels, and temperature

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F24%3A10484661" target="_blank" >RIV/00216208:11320/24:10484661 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=kNbKKLz5p8" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=kNbKKLz5p8</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.electacta.2024.144764" target="_blank" >10.1016/j.electacta.2024.144764</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Electrochemical dissolution of PtRu/C: Effect of potential, fuels, and temperature

Popis výsledku v původním jazyce

Over the last decade, in situ or online inductively coupled plasma mass spectrometry (ICP-MS) has been established as a powerful tool for time- and potential-resolved assessment of electrocatalyst dissolution stability. On the other hand, much more accessible for practical realization ex situ ICP-MS studies in three-electrode cells are not commonly carried out. Still, they can offer valuable insights into catalyst degradation during prolonged accelerated stress tests, thus complementing the online measurements. This work presents an example of how both techniques can be used jointly to study the effect of potential, fuels (isopropanol and glycerol), and temperature on PtRu/C dissolution. PtRu/C is chosen for its potential use as an electrocatalyst in fuel cells and electrosynthesis. Ru is a significantly less noble metal, so it is anticipated to dissolve preferentially, resulting in a loss of the electrocatalyst&apos;s functionality. Elucidating more light into dissolution behavior and the environment&apos;s role can help develop mitigating strategies to minimize such degradation. Our study reveals that potential has a significant effect on the dissolution of both metals. On the contrary, fuels only affect Ru dissolution, with trends varying depending on the fuel. Temperature again affects the stability of both metals, increasing Pt dissolution with temperature. In the case of Ru, however, in certain conditions, metal dissolution decreases at an elevated temperature. Two additional complementary surface-sensitive techniques, i.e., , Cu underpotential deposition and transmission electron microscopy, were used to investigate how Pt and Ru dissolution change their surface concentration. The finding opens the possibility of PtRu/C lifetime prolonging at applications where the potential reaches up to 1.0 V RHE .

Název v anglickém jazyce

Electrochemical dissolution of PtRu/C: Effect of potential, fuels, and temperature

Popis výsledku anglicky

Over the last decade, in situ or online inductively coupled plasma mass spectrometry (ICP-MS) has been established as a powerful tool for time- and potential-resolved assessment of electrocatalyst dissolution stability. On the other hand, much more accessible for practical realization ex situ ICP-MS studies in three-electrode cells are not commonly carried out. Still, they can offer valuable insights into catalyst degradation during prolonged accelerated stress tests, thus complementing the online measurements. This work presents an example of how both techniques can be used jointly to study the effect of potential, fuels (isopropanol and glycerol), and temperature on PtRu/C dissolution. PtRu/C is chosen for its potential use as an electrocatalyst in fuel cells and electrosynthesis. Ru is a significantly less noble metal, so it is anticipated to dissolve preferentially, resulting in a loss of the electrocatalyst&apos;s functionality. Elucidating more light into dissolution behavior and the environment&apos;s role can help develop mitigating strategies to minimize such degradation. Our study reveals that potential has a significant effect on the dissolution of both metals. On the contrary, fuels only affect Ru dissolution, with trends varying depending on the fuel. Temperature again affects the stability of both metals, increasing Pt dissolution with temperature. In the case of Ru, however, in certain conditions, metal dissolution decreases at an elevated temperature. Two additional complementary surface-sensitive techniques, i.e., , Cu underpotential deposition and transmission electron microscopy, were used to investigate how Pt and Ru dissolution change their surface concentration. The finding opens the possibility of PtRu/C lifetime prolonging at applications where the potential reaches up to 1.0 V RHE .

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Electrochimica Acta

ISSN

0013-4686

e-ISSN

1873-3859

Svazek periodika

502

Číslo periodika v rámci svazku

20 Oct

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

10

Strana od-do

144764

Kód UT WoS článku

001294334000001

EID výsledku v databázi Scopus

2-s2.0-85200799689