cicCartuja Centro de Investigaciones Científicas de la cartuja

  • Jobs & Training>>
  • Plasma sputtering synthesis of nanocatalyst for fuel cells: Experiments and molecular dynamics simulations
< El cicCartuja celebra la VI Jornada Futuros Científicos
8 November 2018 09:38 Age: 3 Years
Category: Conference ICMS

Plasma sputtering synthesis of nanocatalyst for fuel cells: Experiments and molecular dynamics simulations


Ciclo de Conferencias ICMS

Título: Plasma sputtering synthesis of nanocatalyst for fuel cells: Experiments and molecular dynamics simulations

Ponente: Dr. Pascal Brault, CNRS-Université d’Orléans (Francia)

Fecha: Jueves, 8 noviembre 2018

Hora: 11:30 h

Lugar: Salón de Grados del cicCartuja 2

Abstract:

Hydrogen powered fuel cells are expected be a relevant solution for green and sustainable energy delivery. Major breakthroughs remain to be achieved. One of them is to lower the noble metal content used as catalysts in the fuel cell electrodes for electrochemical conversion of H2 and O2 from air into electricity, heat and water.Plasma sputtering deposition of supported nanocatalysts has been demonstrated to improve electrode efficiency of low temperature proton exchange membrane fuel cells. Indeed, sputtering can act as an atom source with a controlled energy distribution, which, in turn, enables to control the nanocatalyst growth on the porous carbon electrode with a controlled in-depth profile. This allow to drastically reduce the noble metal content up to a factor 100. Another way is to alloy the noble metal catalyst (here Pt) with a common metal (Fe, Ni, Mo, …) and also with gold. The latter being not a catalyst but is expected to prevent nanocatalyst sintering during fuel cell operation. Very recently, direct growth of Pt alloy nanocatalyst in the plasma phase have been carried out using gas condensation source leading to well defined and narrow nanocluster size distributions.As the nanoparticle growth by sputtering methods is atomic by nature, simulations at the molecular level are expected to be relevant for understanding basic mechanisms of this deposition method. Indeed, molecular dynamics (MD) as being able to exactly calculating the trajectory of atomic systems is a suitable method for addressing this topic, especially in the context of plasma sputtering. Very recently, it has been shown that MD simulations allowed confirming and predicting the morphology and structure of Pt nanocatalysts as well as for PtxPdyAuz and PtxNiyAuz. Direct growth in the plasma phase mimicking the gas condensation source is also studied. Initial conditions of MD simulations are selected for matching experimental chemical and physical methods. Radial distribution functions and X-Ray Diffraction pattern are systematically computed for enabling direct comparison with experiments.

 

 


Center News

14 June 2021

El investigador del IIQ, Jesús Angulo, recibe reconocimiento de la RSEQ

Jesús es nombrado vicepresidente del Grupo Especializado de Resonancia Magnética Nuclear de la Real Sociedad Española de Química.

Category: IIQ

28 May 2021

Conocemos a los ganadores del concurso de nanorelatos 10alamenos9

Los premiados en el concurso de 10alamenos9 en Andalucía, ya han recibido su reconocimiento y diploma acreditativo.

Category: CSIC ICMS

26 April 2021

El proyecto de Biointeractómica del IIQ, financiado por Fund. Ramón Areces

Seleccionado en el XX Concurso Nacional para la adjudicación de Ayudas a la Investigación en ciencias de la Vida y de la Materia

Category: CSIC ICMS

26 April 2021

Jesús Campos, nombrado Premio ‘Joven Investigador 2021’, por La RSEQ y Lilly

El investigador recibirá esta condecoración que reconoce la excelencia en la calidad científica y en la trayectoria profesional de jóvenes promesas españolas menores de 40 años.

Category: CSIC ICMS

26 April 2021

Gerardo Colón, Specialty Chief Editor en Frontiers in Nanotechnology

El investigador del ICMSE es editor jefe de esta prestigiosa revista, en la sección Nanomateriales

Category: CSIC ICMS

19 March 2021

El proyecto de Cristina Megías, financiado por la prestigiosa MSCA

Cristina, que hizo su doctorado en el ICMS, afrontará con su investigación el reciclaje de plásticos y residuos de biomasa para la generación de biopolímertos

Category: CSIC

15 March 2021

SOUNDofICE, el gran proyecto que solucionará la formación de hielo

Coordinado por el Grupo de Nanotecnología en Superficies y Plasma, del ICMS.

Category: CSIC