A5045471404- Electrocatalysts for Energy Conversion
- Fuel Cells and Related Materials
- Catalytic Processes in Materials Science
- Advanced battery technologies research
- Catalysis and Oxidation Reactions
- Electrochemical Analysis and Applications
- Conducting polymers and applications
- Catalysis and Hydrodesulfurization Studies
- Hybrid Renewable Energy Systems
- Nanomaterials for catalytic reactions
- CO2 Reduction Techniques and Catalysts
- Advanced Photocatalysis Techniques
Université Grenoble Alpes
2022-2024
Institut polytechnique de Grenoble
2022-2024
Centre National de la Recherche Scientifique
2022-2024
Laboratoire d’Electrochimie et de Physico-chimie des Matériaux et des Interfaces
2019-2024
Laboratoire d'Electrochimie Moléculaire
2021-2023
Université Savoie Mont Blanc
2022-2023
Hospital Universitário da Universidade de São Paulo
2022
Universidade de São Paulo
2019-2021
MEAs with various cathode Pt loadings were elaborated and aged using a multiple-stressor accelerated stress test (AST) in segmented PEMFC.
The electrochemical reduction of carbon dioxide into monoxide, hydrocarbons and formic acid has offered an interesting alternative for a sustainable energy scenario. In this context, Sn-based electrodes have attracted great deal attention because they present low price toxicity, as well high faradaic efficiency (FE) (or formate) production at relatively overpotentials. work, we investigate the role tin oxide surfaces on formate by means experimental theoretical methods. Cyclic voltammetry...
Abstract Protecting nanoparticles with a carbon matrix can enhance the durability of catalysts in alkaline fuel cells (AFC) and is well‐documented. While others have tried complex syntheses to produce small nanoparticle catalysts, this work, order scale‐up batches 15 g or more, carbon‐cap (or carbon‐coating) protected Vulcan XC72‐supported Pd−Ni (1–2) (Pd−Ni acc /C) were successfully synthesized via one‐step dry‐synthesis process. This catalyst was compared commercial Pd−Ni/Vulcan XC72...
Abstract The interplay between i) cathodic electrocatalytic layer (EC layer) features of proton exchange membrane fuel cell (PEMFC), focusing on the oxygen reduction reaction (ORR) electrocatalyst (EC) and Pt loading; ii) PEMFC performance durability is evaluated. An innovative hierarchical “core–shell” carbon nitride multimetallic ORR ( “PtCuNi/C” H‐EC) compared with a conventional Pt/C benchmark. various contributions to at beginning test (BOT) are isolated correlated physicochemical EC...
In Randles circuit, the oxygen diffusion impedance connects in series with Oxygen Reduction Reaction charge-transfer resistance, implying that Cathode Catalyst Layer (CCL) governs diffusion. The can be connected ORR Gas Diffusion (GDL) rules common finite Warburg element and an alternative expression for through GDL derived by Kulikovsky were tested compared. For this, experimental data obtained from measurements on various cells geometries, MEA types operating conditions used. All cases...
In Randles circuit, the oxygen diffusion impedance connects in series with Oxygen Reduction Reaction charge-transfer resistance, implying that Cathode Catalyst Layer (CCL) governs diffusion. The can be connected ORR Gas Diffusion (GDL) rules common finite Warburg element and an alternative expression for through GDL derived by Kulikovsky were tested compared. For this, experimental data obtained from measurements on various cells geometries, MEA types operating conditions used. All cases...
In Randles circuit, the oxygen diffusion impedance connects in series with Oxygen Reduction Reaction charge-transfer resistance, implying that Cathode Catalyst Layer (CCL) governs diffusion. The can be connected ORR Gas Diffusion (GDL) rules common finite Warburg element and an alternative expression for through GDL derived by Kulikovsky were tested compared. For this, experimental data obtained from measurements on various cells geometries, MEA types operating conditions used. All cases...
Anion exchange membrane fuel cells (AEMFC) have received growing attention due to the strategic potential of using low content (or absence) PGM catalysts in electrodes.[1] Completely PGM-free cathode are well established those conditions,[2] while anode ones remain critical terms beginning-of-life activity and long-term performance.[3] The widely Pt- Pd-based degrade mainly by nanoparticles detachment agglomeration alkaline conditions.[4] These degradations may be slowed down wrapping some...
Recently, the research that explores positive effects of carbon-coating nanoparticles to fight severe oxidation/corrosion in Alkaline fuel cell (AFC), Proton-exchange membrane (PEMFC) or water electrolyzer is well-recognized, since carbon layers can extend catalyst’s durability towards hydrogen oxidation/evolution reactions (HOR, HER) and oxygen evolution/reduction (OER, ORR). Especially for alkaline pH, with graphite coating, Ni both HOR HER resist passivation hydride poisoning. [1,2]...
The idea of a carbon-coated nanoparticles for electrochemical catalysis is not new and was widely used in direct methanol fuel cell (DMFC) [1], since the carbon coating acts as barrier to prevent severe oxidation, thus protecting from detrimental irreversible degradation/corrosion. Recently, this type catalyst demonstrated show excellent durability towards hydrogen oxidation evolution reactions (HOR HER), but also oxygen reduction (OER ORR), both acid (especially) alkaline environment. For...
Alkaline fuel cells (AFC) and anion exchange membrane (AEMFC) have exhibited attractive advantages versus their acid counterparts, including the strategical possibility of using PGM-free catalysts in electrode composition. [1,2] remain a challenge regarding hydrogen oxidation reaction (HOR) catalysis, due to reduced initial long-term performance so far. [3,4] PGM-based materials highest HOR performances, [5] but Pt- Pd-based undergo detrimental metallic nanoparticles detachment from carbon...