AustralieFrV1, PascalFrancis, Corpus, bibRecord, 002F16

Effect of Nafion and platinum content in a catalyst layer processed in a radio frequency helicon plasma system

Identifieur interne : 002F16 ( PascalFrancis/Corpus ); précédent : 002F15; suivant : 002F17

Effect of Nafion and platinum content in a catalyst layer processed in a radio frequency helicon plasma system

Auteurs : A. Caillard ; C. Charles ; D. Ramdutt ; R. Boswell ; P. Brault

Source :

Journal of physics. D, Applied physics : (Print) [ 0022-3727 ] ; 2009.

RBID : Pascal:09-0143225

Descripteurs français

Pascal (Inist)
- Pulvérisation irradiation, Diffusion(transport), Phénomène transport plasma, Hélicon, Puissance volumique, Densité courant, Proton, Carbone, Hydrogène, Oxygène, Courant faible, 5225F.

English descriptors

KwdEn :
- Carbon, Current density, Diffusion, Helicons, Hydrogen, Low current, Oxygen, Plasma transport processes, Power density, Protons, Sputtering.

Abstract

A helicon plasma sputtering system is used to deposit small amounts of platinum on microporous carbon support composed of Vulcan XC 72 carbon particles (known as gas diffusion layer) to form Pt catalyzed electrodes for proton exchange membrane fuel cells. Electrodes with low Pt loading are prepared, assembled in custom-made membrane electrode assemblies (MEAs) and tested for the hydrogen oxydation and the oxygen reduction. Initially, the Nafion® loading spread on these plasma prepared electrodes is optimized by measuring the MEA performance. It is found that the optimum Nafion® loading is 1 mg cm^-2 for an electrode previously covered with 0.1 mg_Pt cm^-2 using the helicon plasma system. For a commercial electrode prepared by ink processes with 0.5 mg_Pt cm^-2, the optimized Nafion® loading is 2 mg cm^-2. Using the respective optimized Nafion® loading, the electrical performance of the custom-made MEA with one plasma prepared electrode (either anode or cathode) is compared with that of a reference MEA from Electrochem Inc. (Pt loading per electrode of 0.5 mg cm^-2 and maximum power density of 425 mW cm^-2) without gas humidification. The custom-made MEA fitted with an anode covered with 0.005 mg_Pt cm^-2 leads to the same performance as that of the reference MEA at low current density (<500 mA cm^-2) and high gas backpressure (3 bar). This result indicates that the catalyst utilization efficiency in the plasma prepared anode is 100 times higher than that in the commercial anode (85 kW g^-1_Pt versus 0.85 kW g^-1_Pt). For plasma prepared cathodes with 0.1 mg_Ptcm^-2, the cathodic Pt utilization efficiency is 2.7 kW g^-1_Pt, which is 3 times higher than that obtained in the commercial cathode.

Notice en format standard (ISO 2709)

Pour connaître la documentation sur le format Inist Standard.

A01	`01`	`1`		`@0 0022-3727`
A02	`01`			`@0 JPAPBE`
A03		`1`		`@0 J. phys., D. Appl. phys. : (Print)`
A05				`@2 42`
A06				`@2 4`
A08	`01`	`1`	`ENG`	`@1 Effect of Nafion and platinum content in a catalyst layer processed in a radio frequency helicon plasma system`
A11	`01`	`1`		`@1 CAILLARD (A.)`
A11	`02`	`1`		`@1 CHARLES (C.)`
A11	`03`	`1`		`@1 RAMDUTT (D.)`
A11	`04`	`1`		`@1 BOSWELL (R.)`
A11	`05`	`1`		`@1 BRAULT (P.)`
A14	`01`			`@1 Space Plasma, Power and Propulsion group, Research School of Physical Sciences and Engineering, The Australian National University @2 Canberra, ACT 0200 @3 AUS @Z 1 aut. @Z 2 aut. @Z 3 aut. @Z 4 aut.`
A14	`02`			`@1 Groupe de Recherche sur l'Energétique des Milieux Ionisés, UMR6606 Université d'Orléans -CNRS Polytech'Orléans, BP6744 @2 45067 Orléans @3 FRA @Z 5 aut.`
A20				`@2 045207.1-045207.9`
A21				`@1 2009`
A23	`01`			`@0 ENG`
A43	`01`			`@1 INIST @2 5841 @5 354000186910490360`
A44				`@0 0000 @1 © 2009 INIST-CNRS. All rights reserved.`
A45				`@0 43 ref.`
A47	`01`	`1`		`@0 09-0143225`
A60				`@1 P`
A61				`@0 A`
A64	`01`	`1`		`@0 Journal of physics. D, Applied physics : (Print)`
A66	`01`			`@0 GBR`
C01	`01`		`ENG`	@0 A helicon plasma sputtering system is used to deposit small amounts of platinum on microporous carbon support composed of Vulcan XC 72 carbon particles (known as gas diffusion layer) to form Pt catalyzed electrodes for proton exchange membrane fuel cells. Electrodes with low Pt loading are prepared, assembled in custom-made membrane electrode assemblies (MEAs) and tested for the hydrogen oxydation and the oxygen reduction. Initially, the Nafion® loading spread on these plasma prepared electrodes is optimized by measuring the MEA performance. It is found that the optimum Nafion® loading is 1 mg cm^-2 for an electrode previously covered with 0.1 mg_Pt cm^-2 using the helicon plasma system. For a commercial electrode prepared by ink processes with 0.5 mg_Pt cm^-2, the optimized Nafion® loading is 2 mg cm^-2. Using the respective optimized Nafion® loading, the electrical performance of the custom-made MEA with one plasma prepared electrode (either anode or cathode) is compared with that of a reference MEA from Electrochem Inc. (Pt loading per electrode of 0.5 mg cm^-2 and maximum power density of 425 mW cm^-2) without gas humidification. The custom-made MEA fitted with an anode covered with 0.005 mg_Pt cm^-2 leads to the same performance as that of the reference MEA at low current density (<500 mA cm^-2) and high gas backpressure (3 bar). This result indicates that the catalyst utilization efficiency in the plasma prepared anode is 100 times higher than that in the commercial anode (85 kW g^-1_Pt versus 0.85 kW g^-1_Pt). For plasma prepared cathodes with 0.1 mg_Ptcm^-2, the cathodic Pt utilization efficiency is 2.7 kW g^-1_Pt, which is 3 times higher than that obtained in the commercial cathode.
C02	`01`	`3`		`@0 001B50B25F`
C03	`01`	`3`	`FRE`	`@0 Pulvérisation irradiation @5 03`
C03	`01`	`3`	`ENG`	`@0 Sputtering @5 03`
C03	`02`	`3`	`FRE`	`@0 Diffusion(transport) @5 04`
C03	`02`	`3`	`ENG`	`@0 Diffusion @5 04`
C03	`03`	`3`	`FRE`	`@0 Phénomène transport plasma @5 05`
C03	`03`	`3`	`ENG`	`@0 Plasma transport processes @5 05`
C03	`04`	`3`	`FRE`	`@0 Hélicon @5 11`
C03	`04`	`3`	`ENG`	`@0 Helicons @5 11`
C03	`05`	`3`	`FRE`	`@0 Puissance volumique @5 41`
C03	`05`	`3`	`ENG`	`@0 Power density @5 41`
C03	`06`	`3`	`FRE`	`@0 Densité courant @5 42`
C03	`06`	`3`	`ENG`	`@0 Current density @5 42`
C03	`07`	`3`	`FRE`	`@0 Proton @5 57`
C03	`07`	`3`	`ENG`	`@0 Protons @5 57`
C03	`08`	`3`	`FRE`	`@0 Carbone @2 NC @5 61`
C03	`08`	`3`	`ENG`	`@0 Carbon @2 NC @5 61`
C03	`09`	`3`	`FRE`	`@0 Hydrogène @2 NC @5 62`
C03	`09`	`3`	`ENG`	`@0 Hydrogen @2 NC @5 62`
C03	`10`	`3`	`FRE`	`@0 Oxygène @2 NC @5 63`
C03	`10`	`3`	`ENG`	`@0 Oxygen @2 NC @5 63`
C03	`11`	`X`	`FRE`	`@0 Courant faible @5 64`
C03	`11`	`X`	`ENG`	`@0 Low current @5 64`
C03	`11`	`X`	`SPA`	`@0 Corriente débil @5 64`
C03	`12`	`3`	`FRE`	`@0 5225F @4 INC @5 91`
N21				`@1 103`
N44	`01`			`@1 OTO`
N82				`@1 OTO`

Format Inist (serveur)

NO :	PASCAL 09-0143225 INIST
ET :	Effect of Nafion and platinum content in a catalyst layer processed in a radio frequency helicon plasma system
AU :	CAILLARD (A.); CHARLES (C.); RAMDUTT (D.); BOSWELL (R.); BRAULT (P.)
AF :	Space Plasma, Power and Propulsion group, Research School of Physical Sciences and Engineering, The Australian National University/Canberra, ACT 0200/Australie (1 aut., 2 aut., 3 aut., 4 aut.); Groupe de Recherche sur l'Energétique des Milieux Ionisés, UMR6606 Université d'Orléans -CNRS Polytech'Orléans, BP6744/45067 Orléans/France (5 aut.)
DT :	Publication en série; Niveau analytique
SO :	Journal of physics. D, Applied physics : (Print); ISSN 0022-3727; Coden JPAPBE; Royaume-Uni; Da. 2009; Vol. 42; No. 4; 045207.1-045207.9; Bibl. 43 ref.
LA :	Anglais
EA :	A helicon plasma sputtering system is used to deposit small amounts of platinum on microporous carbon support composed of Vulcan XC 72 carbon particles (known as gas diffusion layer) to form Pt catalyzed electrodes for proton exchange membrane fuel cells. Electrodes with low Pt loading are prepared, assembled in custom-made membrane electrode assemblies (MEAs) and tested for the hydrogen oxydation and the oxygen reduction. Initially, the Nafion® loading spread on these plasma prepared electrodes is optimized by measuring the MEA performance. It is found that the optimum Nafion® loading is 1 mg cm^-2 for an electrode previously covered with 0.1 mg_Pt cm^-2 using the helicon plasma system. For a commercial electrode prepared by ink processes with 0.5 mg_Pt cm^-2, the optimized Nafion® loading is 2 mg cm^-2. Using the respective optimized Nafion® loading, the electrical performance of the custom-made MEA with one plasma prepared electrode (either anode or cathode) is compared with that of a reference MEA from Electrochem Inc. (Pt loading per electrode of 0.5 mg cm^-2 and maximum power density of 425 mW cm^-2) without gas humidification. The custom-made MEA fitted with an anode covered with 0.005 mg_Pt cm^-2 leads to the same performance as that of the reference MEA at low current density (<500 mA cm^-2) and high gas backpressure (3 bar). This result indicates that the catalyst utilization efficiency in the plasma prepared anode is 100 times higher than that in the commercial anode (85 kW g^-1_Pt versus 0.85 kW g^-1_Pt). For plasma prepared cathodes with 0.1 mg_Ptcm^-2, the cathodic Pt utilization efficiency is 2.7 kW g^-1_Pt, which is 3 times higher than that obtained in the commercial cathode.
CC :	001B50B25F
FD :	Pulvérisation irradiation; Diffusion(transport); Phénomène transport plasma; Hélicon; Puissance volumique; Densité courant; Proton; Carbone; Hydrogène; Oxygène; Courant faible; 5225F
ED :	Sputtering; Diffusion; Plasma transport processes; Helicons; Power density; Current density; Protons; Carbon; Hydrogen; Oxygen; Low current
SD :	Corriente débil
LO :	INIST-5841.354000186910490360
ID :	09-0143225

Links to Exploration step

Pascal:09-0143225

Le document en format XML

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<s2>Canberra, ACT 0200</s2>
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<term>Plasma transport processes</term>
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<term>Sputtering</term>
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<term>Densité courant</term>
<term>Proton</term>
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<front><div type="abstract" xml:lang="en">A helicon plasma sputtering system is used to deposit small amounts of platinum on microporous carbon support composed of Vulcan XC 72 carbon particles (known as gas diffusion layer) to form Pt catalyzed electrodes for proton exchange membrane fuel cells. Electrodes with low Pt loading are prepared, assembled in custom-made membrane electrode assemblies (MEAs) and tested for the hydrogen oxydation and the oxygen reduction. Initially, the Nafion® loading spread on these plasma prepared electrodes is optimized by measuring the MEA performance. It is found that the optimum Nafion® loading is 1 mg cm<sup>-2</sup>
 for an electrode previously covered with 0.1 mg<sub>Pt</sub>
 cm<sup>-2</sup>
 using the helicon plasma system. For a commercial electrode prepared by ink processes with 0.5 mg<sub>Pt</sub>
 cm<sup>-2</sup>
, the optimized Nafion® loading is 2 mg cm<sup>-2</sup>
. Using the respective optimized Nafion® loading, the electrical performance of the custom-made MEA with one plasma prepared electrode (either anode or cathode) is compared with that of a reference MEA from Electrochem Inc. (Pt loading per electrode of 0.5 mg cm<sup>-2</sup>
 and maximum power density of 425 mW cm<sup>-2</sup>
) without gas humidification. The custom-made MEA fitted with an anode covered with 0.005 mg<sub>Pt</sub>
 cm<sup>-2</sup>
 leads to the same performance as that of the reference MEA at low current density (<500 mA cm<sup>-2</sup>
) and high gas backpressure (3 bar). This result indicates that the catalyst utilization efficiency in the plasma prepared anode is 100 times higher than that in the commercial anode (85 kW g<sup>-1</sup>
<sub>Pt</sub>
 versus 0.85 kW g<sup>-1</sup>
<sub>Pt</sub>
). For plasma prepared cathodes with 0.1 mg<sub>Pt</sub>
cm<sup>-2</sup>
, the cathodic Pt utilization efficiency is 2.7 kW g<sup>-1</sup>
<sub>Pt</sub>
, which is 3 times higher than that obtained in the commercial cathode.</div>
</front>
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<fA14 i1="01"><s1>Space Plasma, Power and Propulsion group, Research School of Physical Sciences and Engineering, The Australian National University</s1>
<s2>Canberra, ACT 0200</s2>
<s3>AUS</s3>
<sZ>1 aut.</sZ>
<sZ>2 aut.</sZ>
<sZ>3 aut.</sZ>
<sZ>4 aut.</sZ>
</fA14>
<fA14 i1="02"><s1>Groupe de Recherche sur l'Energétique des Milieux Ionisés, UMR6606 Université d'Orléans -CNRS Polytech'Orléans, BP6744</s1>
<s2>45067 Orléans</s2>
<s3>FRA</s3>
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<fA45><s0>43 ref.</s0>
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<fA47 i1="01" i2="1"><s0>09-0143225</s0>
</fA47>
<fA60><s1>P</s1>
</fA60>
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</fA66>
<fC01 i1="01" l="ENG"><s0>A helicon plasma sputtering system is used to deposit small amounts of platinum on microporous carbon support composed of Vulcan XC 72 carbon particles (known as gas diffusion layer) to form Pt catalyzed electrodes for proton exchange membrane fuel cells. Electrodes with low Pt loading are prepared, assembled in custom-made membrane electrode assemblies (MEAs) and tested for the hydrogen oxydation and the oxygen reduction. Initially, the Nafion® loading spread on these plasma prepared electrodes is optimized by measuring the MEA performance. It is found that the optimum Nafion® loading is 1 mg cm<sup>-2</sup>
 for an electrode previously covered with 0.1 mg<sub>Pt</sub>
 cm<sup>-2</sup>
 using the helicon plasma system. For a commercial electrode prepared by ink processes with 0.5 mg<sub>Pt</sub>
 cm<sup>-2</sup>
, the optimized Nafion® loading is 2 mg cm<sup>-2</sup>
. Using the respective optimized Nafion® loading, the electrical performance of the custom-made MEA with one plasma prepared electrode (either anode or cathode) is compared with that of a reference MEA from Electrochem Inc. (Pt loading per electrode of 0.5 mg cm<sup>-2</sup>
 and maximum power density of 425 mW cm<sup>-2</sup>
) without gas humidification. The custom-made MEA fitted with an anode covered with 0.005 mg<sub>Pt</sub>
 cm<sup>-2</sup>
 leads to the same performance as that of the reference MEA at low current density (<500 mA cm<sup>-2</sup>
) and high gas backpressure (3 bar). This result indicates that the catalyst utilization efficiency in the plasma prepared anode is 100 times higher than that in the commercial anode (85 kW g<sup>-1</sup>
<sub>Pt</sub>
 versus 0.85 kW g<sup>-1</sup>
<sub>Pt</sub>
). For plasma prepared cathodes with 0.1 mg<sub>Pt</sub>
cm<sup>-2</sup>
, the cathodic Pt utilization efficiency is 2.7 kW g<sup>-1</sup>
<sub>Pt</sub>
, which is 3 times higher than that obtained in the commercial cathode.</s0>
</fC01>
<fC02 i1="01" i2="3"><s0>001B50B25F</s0>
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<fC03 i1="01" i2="3" l="FRE"><s0>Pulvérisation irradiation</s0>
<s5>03</s5>
</fC03>
<fC03 i1="01" i2="3" l="ENG"><s0>Sputtering</s0>
<s5>03</s5>
</fC03>
<fC03 i1="02" i2="3" l="FRE"><s0>Diffusion(transport)</s0>
<s5>04</s5>
</fC03>
<fC03 i1="02" i2="3" l="ENG"><s0>Diffusion</s0>
<s5>04</s5>
</fC03>
<fC03 i1="03" i2="3" l="FRE"><s0>Phénomène transport plasma</s0>
<s5>05</s5>
</fC03>
<fC03 i1="03" i2="3" l="ENG"><s0>Plasma transport processes</s0>
<s5>05</s5>
</fC03>
<fC03 i1="04" i2="3" l="FRE"><s0>Hélicon</s0>
<s5>11</s5>
</fC03>
<fC03 i1="04" i2="3" l="ENG"><s0>Helicons</s0>
<s5>11</s5>
</fC03>
<fC03 i1="05" i2="3" l="FRE"><s0>Puissance volumique</s0>
<s5>41</s5>
</fC03>
<fC03 i1="05" i2="3" l="ENG"><s0>Power density</s0>
<s5>41</s5>
</fC03>
<fC03 i1="06" i2="3" l="FRE"><s0>Densité courant</s0>
<s5>42</s5>
</fC03>
<fC03 i1="06" i2="3" l="ENG"><s0>Current density</s0>
<s5>42</s5>
</fC03>
<fC03 i1="07" i2="3" l="FRE"><s0>Proton</s0>
<s5>57</s5>
</fC03>
<fC03 i1="07" i2="3" l="ENG"><s0>Protons</s0>
<s5>57</s5>
</fC03>
<fC03 i1="08" i2="3" l="FRE"><s0>Carbone</s0>
<s2>NC</s2>
<s5>61</s5>
</fC03>
<fC03 i1="08" i2="3" l="ENG"><s0>Carbon</s0>
<s2>NC</s2>
<s5>61</s5>
</fC03>
<fC03 i1="09" i2="3" l="FRE"><s0>Hydrogène</s0>
<s2>NC</s2>
<s5>62</s5>
</fC03>
<fC03 i1="09" i2="3" l="ENG"><s0>Hydrogen</s0>
<s2>NC</s2>
<s5>62</s5>
</fC03>
<fC03 i1="10" i2="3" l="FRE"><s0>Oxygène</s0>
<s2>NC</s2>
<s5>63</s5>
</fC03>
<fC03 i1="10" i2="3" l="ENG"><s0>Oxygen</s0>
<s2>NC</s2>
<s5>63</s5>
</fC03>
<fC03 i1="11" i2="X" l="FRE"><s0>Courant faible</s0>
<s5>64</s5>
</fC03>
<fC03 i1="11" i2="X" l="ENG"><s0>Low current</s0>
<s5>64</s5>
</fC03>
<fC03 i1="11" i2="X" l="SPA"><s0>Corriente débil</s0>
<s5>64</s5>
</fC03>
<fC03 i1="12" i2="3" l="FRE"><s0>5225F</s0>
<s4>INC</s4>
<s5>91</s5>
</fC03>
<fN21><s1>103</s1>
</fN21>
<fN44 i1="01"><s1>OTO</s1>
</fN44>
<fN82><s1>OTO</s1>
</fN82>
</pA>
</standard>
<server><NO>PASCAL 09-0143225 INIST</NO>
<ET>Effect of Nafion and platinum content in a catalyst layer processed in a radio frequency helicon plasma system</ET>
<AU>CAILLARD (A.); CHARLES (C.); RAMDUTT (D.); BOSWELL (R.); BRAULT (P.)</AU>
<AF>Space Plasma, Power and Propulsion group, Research School of Physical Sciences and Engineering, The Australian National University/Canberra, ACT 0200/Australie (1 aut., 2 aut., 3 aut., 4 aut.); Groupe de Recherche sur l'Energétique des Milieux Ionisés, UMR6606 Université d'Orléans -CNRS Polytech'Orléans, BP6744/45067 Orléans/France (5 aut.)</AF>
<DT>Publication en série; Niveau analytique</DT>
<SO>Journal of physics. D, Applied physics : (Print); ISSN 0022-3727; Coden JPAPBE; Royaume-Uni; Da. 2009; Vol. 42; No. 4; 045207.1-045207.9; Bibl. 43 ref.</SO>
<LA>Anglais</LA>
<EA>A helicon plasma sputtering system is used to deposit small amounts of platinum on microporous carbon support composed of Vulcan XC 72 carbon particles (known as gas diffusion layer) to form Pt catalyzed electrodes for proton exchange membrane fuel cells. Electrodes with low Pt loading are prepared, assembled in custom-made membrane electrode assemblies (MEAs) and tested for the hydrogen oxydation and the oxygen reduction. Initially, the Nafion® loading spread on these plasma prepared electrodes is optimized by measuring the MEA performance. It is found that the optimum Nafion® loading is 1 mg cm<sup>-2</sup>
 for an electrode previously covered with 0.1 mg<sub>Pt</sub>
 cm<sup>-2</sup>
 using the helicon plasma system. For a commercial electrode prepared by ink processes with 0.5 mg<sub>Pt</sub>
 cm<sup>-2</sup>
, the optimized Nafion® loading is 2 mg cm<sup>-2</sup>
. Using the respective optimized Nafion® loading, the electrical performance of the custom-made MEA with one plasma prepared electrode (either anode or cathode) is compared with that of a reference MEA from Electrochem Inc. (Pt loading per electrode of 0.5 mg cm<sup>-2</sup>
 and maximum power density of 425 mW cm<sup>-2</sup>
) without gas humidification. The custom-made MEA fitted with an anode covered with 0.005 mg<sub>Pt</sub>
 cm<sup>-2</sup>
 leads to the same performance as that of the reference MEA at low current density (<500 mA cm<sup>-2</sup>
) and high gas backpressure (3 bar). This result indicates that the catalyst utilization efficiency in the plasma prepared anode is 100 times higher than that in the commercial anode (85 kW g<sup>-1</sup>
<sub>Pt</sub>
 versus 0.85 kW g<sup>-1</sup>
<sub>Pt</sub>
). For plasma prepared cathodes with 0.1 mg<sub>Pt</sub>
cm<sup>-2</sup>
, the cathodic Pt utilization efficiency is 2.7 kW g<sup>-1</sup>
<sub>Pt</sub>
, which is 3 times higher than that obtained in the commercial cathode.</EA>
<CC>001B50B25F</CC>
<FD>Pulvérisation irradiation; Diffusion(transport); Phénomène transport plasma; Hélicon; Puissance volumique; Densité courant; Proton; Carbone; Hydrogène; Oxygène; Courant faible; 5225F</FD>
<ED>Sputtering; Diffusion; Plasma transport processes; Helicons; Power density; Current density; Protons; Carbon; Hydrogen; Oxygen; Low current</ED>
<SD>Corriente débil</SD>
<LO>INIST-5841.354000186910490360</LO>
<ID>09-0143225</ID>
</server>
</inist>
</record>

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Effect of Nafion and platinum content in a catalyst layer processed in a radio frequency helicon plasma system

Effect of Nafion and platinum content in a catalyst layer processed in a radio frequency helicon plasma system

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