Stability of multifunctional Pd-Rh electrocatalysts supported on Co3O4(111) in alkaline environment: impact of the electronic metal-support interaction

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F25%3A10501148" target="_blank" >RIV/00216208:11320/25:10501148 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=qyvAmr98Xq" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=qyvAmr98Xq</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1039/d5nr00413f" target="_blank" >10.1039/d5nr00413f</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Stability of multifunctional Pd-Rh electrocatalysts supported on Co3O4(111) in alkaline environment: impact of the electronic metal-support interaction

Popis výsledku v původním jazyce

The stabilities of monometallic Rh and Pd nanoparticles and bimetallic Pd-Rh core-shell nanoparticles supported on Co3O4(111) thin films grown on Ir(100) were investigated with respect to the oxidation state and dissolution in alkaline electrolyte under the conditions relevant for electrochemical ethanol oxidation. Towards this aim, the well-defined model systems were characterized by means of synchrotron radiation photoelectron spectroscopy coupled with an ex situ emersion electrochemical cell (EC-SRPES) and scanning tunneling microscopy (STM). We found that the electronic metal-support interaction (EMSI) has a strong influence on the oxidation state of Rh, resulting in a strong oxidation and anchoring of the oxidized Rh3+ species on the surface of Co3O4(111). Consequently, the EMSI prevents the dissolution of Rh into the electrolyte regardless of the potential range. In contrast, it has no effect on the oxidation state and dissolution of Pd in the potential range of 0.3-1.1 VRHE. However, extending the potential range to 0.3-1.5 VRHE results in a stronger dissolution of Pd due to the reversible oxidation/reduction of Pd, which is enhanced in the presence of the EMSI. Most importantly, the magnitude of the EMSI and, thus, the extent of noble metal oxidation, can be effectively controlled by the nature of the metal/Co3O4(111) interface in the bimetallic Pd-Rh core-shell nanoparticles.

Název v anglickém jazyce

Stability of multifunctional Pd-Rh electrocatalysts supported on Co3O4(111) in alkaline environment: impact of the electronic metal-support interaction

Popis výsledku anglicky

The stabilities of monometallic Rh and Pd nanoparticles and bimetallic Pd-Rh core-shell nanoparticles supported on Co3O4(111) thin films grown on Ir(100) were investigated with respect to the oxidation state and dissolution in alkaline electrolyte under the conditions relevant for electrochemical ethanol oxidation. Towards this aim, the well-defined model systems were characterized by means of synchrotron radiation photoelectron spectroscopy coupled with an ex situ emersion electrochemical cell (EC-SRPES) and scanning tunneling microscopy (STM). We found that the electronic metal-support interaction (EMSI) has a strong influence on the oxidation state of Rh, resulting in a strong oxidation and anchoring of the oxidized Rh3+ species on the surface of Co3O4(111). Consequently, the EMSI prevents the dissolution of Rh into the electrolyte regardless of the potential range. In contrast, it has no effect on the oxidation state and dissolution of Pd in the potential range of 0.3-1.1 VRHE. However, extending the potential range to 0.3-1.5 VRHE results in a stronger dissolution of Pd due to the reversible oxidation/reduction of Pd, which is enhanced in the presence of the EMSI. Most importantly, the magnitude of the EMSI and, thus, the extent of noble metal oxidation, can be effectively controlled by the nature of the metal/Co3O4(111) interface in the bimetallic Pd-Rh core-shell nanoparticles.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10305 - Fluids and plasma physics (including surface physics)

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

2025

Kód důvěrnosti údajů

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

Název periodika

Nanoscale

ISSN

2040-3364

e-ISSN

2040-3372

Svazek periodika

17

Číslo periodika v rámci svazku

18

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

12

Strana od-do

11679-11690

Kód UT WoS článku

001471747300001

EID výsledku v databázi Scopus

2-s2.0-105003750746