Plasma assisted diffusion in porous materials: Experiments, modeling and applications

被引：1

作者：

Brault, Pascal ^{[1
]}

Bauchire, Jean-Marc ^{[1
]}

James, Francois ^{[2
]}

Josserand, Christophe ^{[3
]}

机构：

[1] Univ Orleans, CNRS, GREMI, UMR6606, BP 6744, F-45067 Orleans, France

[2] Univ Orleans, CNRS, UMR 6628, MAPMO, Orleans, France

[3] Univ Paris 06, CNRS, UMR 7190, IJLRA, F-75005 Paris, France

来源：

DIFFUSION IN MATERIALS - DIMAT 2011 | 2012年 / 323-325卷

关键词：

Anomalous diffusion equation; plasma sputtering deposition; AAO template; porous carbon; random stacking; catalytic film; fuel cell; FUEL-CELL ELECTRODES; SPUTTERING DEPOSITION; ANOMALOUS DIFFUSION; PLATINUM; EQUATION;

D O I：

10.4028/www.scientific.net/DDF.323-325.387

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Plasma sputtering deposition of platinum on porous substrates is a relevant way for building high performance catalytic thin films. The knowledge and control of platinum density adsorbed in the porous medium, during deposition, are of primary importance. We show that the experimental concentration depth profiles originate from a superdiffusion phenomenon. Moreover experimental results are well described by a classical porous-fractal diffusion model, for which diffusion coefficient is also time-dependent, even if such a model does not include the proper physical mechanisms.

引用

页码：387 / +

页数：3

共 16 条

[1] Plasma sputtering deposition of platinum into porous fuel cell electrodes
Brault, P
Caillard, A
Thomann, AL
Mathias, J
Charles, C
Boswell, RW
Escribano, S
Durand, J
Sauvage, T
[J]. JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2004, 37 (24) : 3419 - 3423
[2] Plasma deposition of catalytic thin films: Experiments, applications, molecular modeling
Brault, Pascal
[J]. SURFACE & COATINGS TECHNOLOGY, 2011, 205 : S15 - S23
[3] Anomalous Diffusion Mediated by Atom Deposition into a Porous Substrate
Brault, Pascal
Josserand, Christophe
Bauchire, Jean-Marc
Caillard, Amael
Charles, Christine
Boswell, Rod W.
[J]. PHYSICAL REVIEW LETTERS, 2009, 102 (04)
[4] Deposition and diffusion of platinum nanoparticles in porous carbon assisted by plasma sputtering
Caillard, A
Brault, P
Mathias, J
Charles, C
Boswell, RW
Sauvage, T
[J]. SURFACE & COATINGS TECHNOLOGY, 2005, 200 (1-4) : 391 - 394
[5] Plasma based platinum nanoaggregates deposited on carbon nanofibers improve fuel cell efficiency
Caillard, Amael
Charles, Christine
Boswell, Rod
Brault, Pascal
Coutanceau, Christophe
[J]. APPLIED PHYSICS LETTERS, 2007, 90 (22)
[6] Performance of plasma sputtered fuel cell electrodes with ultra-low Pt loadings
Cavarroc, M.
Ennadjaoui, A.
Mougenot, M.
Brault, P.
Escalier, R.
Tessier, Y.
Durand, J.
Roualdes, S.
Sauvage, T.
Coutanceau, C.
[J]. ELECTROCHEMISTRY COMMUNICATIONS, 2009, 11 (04) : 859 - 861
[7] Statistical thermodynamics models for multicomponent isothermal diphasic equilibria
James, F
Sepulveda, M
Valentin, P
[J]. MATHEMATICAL MODELS & METHODS IN APPLIED SCIENCES, 1997, 7 (01) : 1 - 29
[8] Numerical comparison between relaxation and nonlinear equilibrium models.: Application to chemical engineering
James, F
Postel, M
Sepúlveda, M
[J]. PHYSICA D-NONLINEAR PHENOMENA, 2000, 138 (3-4) : 316 - 333
[9] THE ADSORPTION OF GASES ON PLANE SURFACES OF GLASS, MICA AND PLATINUM.
Langmuir, Irving
[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1918, 40 : 1361 - 1403
[10] Nonlinear equation for anomalous diffusion: Unified power-law and stretched exponential exact solution
Malacarne, LC
Mendes, RS
Pedron, IT
Lenzi, EK
[J]. PHYSICAL REVIEW E, 2001, 63 (03):

← 1 2 →