公开(公告)号：JP2002110180A

公开(公告)日：2002-04-12

申请号：JP2001226524

申请日：2001-07-26

Applicant: DMC2 DEGUSSA METALS CATALYSTS CERDEC AG

Inventor： BINDER MATTHIAS ,  ZUBER RALF DR ,  VOGT MARKUS ,  HEINZ GERHARD

IPC: H01M4/90 ,  H01M4/86 ,  H01M4/88 ,  H01M4/92 ,  H01M8/1004 ,  H01M8/02 ,  H01M8/10

Abstract: PROBLEM TO BE SOLVED: To furthermore improve the structure of a reaction layer including electrode catalyst so as to furthermore enhance the output power of a fuel cell at low current density. SOLUTION: A film-electrode unit which comprises a polyelectrolyte-film having a first and a second surface wherein both surfaces are in contact with porous reaction layers and gas partition layers, and wherein one of the two reaction layers includes noble metal as black powder, in the film-electrode unit for a polyelectrolyte-fuel cell where the reaction layers include noble metal catalyst carried on carbon and ionomers.

公开(公告)号：JP2000123843A

公开(公告)日：2000-04-28

申请号：JP29241899

申请日：1999-10-14

Applicant: DEGUSSA

Inventor： EMANUEL AUER ,  HEINZ GERHARD ,  LEHMANN THOMAS DR ,  SCHWARZ ROBERT ,  STARZ KARL-ANTON DR

IPC: B01J23/40 ,  B01J23/42 ,  B01J23/46 ,  B01J23/56 ,  B01J23/89 ,  B01J35/02 ,  H01M4/92

Abstract: PROBLEM TO BE SOLVED: To provide an improved alloy catalyst of Pt/Rh/Fe for a fuel cell, more active and stable than a conventional catalyst. SOLUTION: This a platinum alloy catalyst on a conductive carbon carrier contains an alloy a fine alloy particle shape formed out of 40 to 60 atm.% platinum, 10 to 20 atm.% rhodium, and 20 to 50 atm.% iron. The catalyst is characterized by having the mean particle size of the alloy particles

公开(公告)号：DE59602928D1

公开(公告)日：1999-10-07

申请号：DE59602928

申请日：1996-04-26

Applicant: DEGUSSA

Inventor： FREUND ANDREAS ,  LEHMANN THOMAS ,  STARZ KARL-ANTON ,  HEINZ GERHARD ,  SCHWARZ ROBERT

IPC: C01B3/40 ,  B01J23/42 ,  B01J23/56 ,  B01J23/89 ,  B01J27/22 ,  C22C5/04 ,  H01M4/88 ,  H01M4/92 ,  H01M8/02

Abstract: Pt-Al alloy catalyst on a conducting carbon carrier is claimed, in which the atomic ratio of Pt to Al is 80-60: 20-40 and the alloy particles are present on the carbon carrier in carbided form with the structure of the Pt-Al carbide (Pt3AlC0.5). Prodn. of the catalyst is also claimed.

公开(公告)号：DE59503910D1

公开(公告)日：1998-11-19

申请号：DE59503910

申请日：1995-07-04

Applicant: DEGUSSA

Inventor： BRAND REINHOLD DR ,  FREUND ANDREAS DR ,  LANG JUTTA DR ,  LEHMANN THOMAS DR ,  OHMER JOHANNES DR ,  TACKE THOMAS DR ,  HEINZ GERHARD ,  SCHWARZ ROBERT

IPC: B01J23/89 ,  B01J37/03 ,  H01M4/92

Abstract: A ternary platinum alloy catalyst on a conductive carbon carrier for use in fuel cells is disclosed. For the production of the catalyst, nitrate salts are used as precursors of the alloy components and all alloy components are deposited concurrently on the carbon carrier. This method of procedure yields ageing-stable catalysts with high oxygen mass activity.

公开(公告)号：CA2353761A1

公开(公告)日：2002-01-29

申请号：CA2353761

申请日：2001-07-25

Applicant: DMC2 DEGUSSA METALS CATALYSTS

Inventor： BINDER MATTHIAS ,  ZUBER RALF ,  VOGT MARKUS ,  HEINZ GERHARD

IPC: H01M4/90 ,  H01M4/86 ,  H01M4/88 ,  H01M4/92 ,  H01M8/1004 ,  H01M8/24

Abstract: The invention provides a membrane electrode unit for polymer electrolyte fue l cells consisting of a polymer electrolyte membrane, both faces of which are in contact with porous reaction layers and gas distributor layers. The reaction layers conta in noble metal catalysts supported on carbon and a proton-conducting polymer, a so- called ionomer. The membrane electrode unit is characterised in that at least one o f the two reaction layers also contains a noble metal black.

公开(公告)号：DE19848032A1

公开(公告)日：2000-04-20

申请号：DE19848032

申请日：1998-10-17

Applicant: DEGUSSA

Inventor： AUER EMMANUEL ,  HEINZ GERHARD ,  LEHMANN THOMAS ,  SCHWARZ ROBERT ,  STARZ KARL-ANTON

IPC: B01J23/40 ,  B01J23/42 ,  B01J23/46 ,  B01J23/56 ,  B01J23/89 ,  B01J35/02 ,  H01M4/92

Abstract: Platinum alloy catalyst contains 40-60 atom % Pt, 10-20 atom % Rh and 20-50 atom % Fe in the form of alloying particles of average diameter of less than 10 nm on an electrically conducting carbon support. An Independent claim is also included for the production of a Pt alloy catalyst comprising: (a) preparing a support suspension of the carbon support in water; (b) heating the suspension to the boiling point and maintaining at that temperature during the following steps; (c) adding aqueous solutions of hexachloroplatinic acid and rhodium chloride and also iron nitrate; precipitating out Pt, Rh and Fe by slowly adding caustic soda; (e) reducing the precipitated out compounds by adding an aqueous reductant; (f) removing the catalyst from the aqueous phase of the suspension; (g) drying the catalyst; (h) calcining the catalyst in an inert atmosphere at 700-1000o C for 0.5-2 hours; and (i) reducing the temperature from 700 to 500o C for a further 0.5-2 hours.

公开(公告)号：DK0743092T3

公开(公告)日：2000-03-27

申请号：DK96106596

申请日：1996-04-26

Applicant: DEGUSSA

Inventor： FREUND ANDREAS DR ,  LEHMANN THOMAS DR ,  STARZ KARL-ANTON DR ,  HEINZ GERHARD ,  SCHWARZ ROBERT

IPC: C01B3/40 ,  B01J23/42 ,  B01J23/56 ,  B01J23/89 ,  B01J27/22 ,  C22C5/04 ,  H01M4/88 ,  H01M4/92 ,  H01M8/02

Abstract: Pt-Al alloy catalyst on a conducting carbon carrier is claimed, in which the atomic ratio of Pt to Al is 80-60: 20-40 and the alloy particles are present on the carbon carrier in carbided form with the structure of the Pt-Al carbide (Pt3AlC0.5). Prodn. of the catalyst is also claimed.

公开(公告)号：AT183946T

公开(公告)日：1999-09-15

申请号：AT96106596

申请日：1996-04-26

Applicant: DEGUSSA

Inventor： FREUND ANDREAS DR ,  LEHMANN THOMAS DR ,  STARZ KARL-ANTON DR ,  HEINZ GERHARD ,  SCHWARZ ROBERT

IPC: C01B3/40 ,  B01J23/42 ,  B01J23/56 ,  B01J23/89 ,  B01J27/22 ,  C22C5/04 ,  H01M4/88 ,  H01M4/92 ,  H01M8/02

Abstract: Pt-Al alloy catalyst on a conducting carbon carrier is claimed, in which the atomic ratio of Pt to Al is 80-60: 20-40 and the alloy particles are present on the carbon carrier in carbided form with the structure of the Pt-Al carbide (Pt3AlC0.5). Prodn. of the catalyst is also claimed.

公开(公告)号：BR0103064A

公开(公告)日：2002-04-02

申请号：BR0103064

申请日：2001-07-30

Applicant: DMC2 DEGUSSA METALS CATALYSTS

Inventor： BINDER MATTHIAS ,  ZUBER RALF ,  VOGT MARKUS ,  HEINZ GERHARD

IPC: H01M4/90 ,  H01M4/86 ,  H01M4/88 ,  H01M4/92 ,  H01M8/1004 ,  H01M8/02

Abstract: Membrane-electrode unit consists of a polymer electrolyte membrane having a first side and a second side both having porous reaction layers and gas distributor layers. The reaction layers contains precious metal catalysts supported on carbon, and ionomers. One of the reaction layers additionally contains a precious metal. An Independent claim is also included for the production of a membrane-electrode unit comprising: (a) applying a reaction layer containing a precious metal on the first side of the polymer electrolyte membrane; (b) applying the second reaction layer on the second side of the polymer electrolyte membrane; and (c) contacting the reaction layers with the gas distribution layers. The step of applying the reaction layer on the first side of the membrane comprises preparing an ink by mixing the precious metal and the supported catalyst in a solution of an ion-conducting polymer in a solvent, dispersing and homogenizing the ink, coating the first side of the membrane with the ink, and finishing the reaction layer by drying the coating. Preferably the total thickness of one reaction layer is 5-100, preferably 10-50 microns.

公开(公告)号：BR9904688A

公开(公告)日：2000-08-08

申请号：BR9904688

申请日：1999-10-15

Applicant: DEGUSSA

Inventor： AUER EMMANUEL DR ,  HEINZ GERHARD ,  LEHMANN THOMAS DR ,  STARZ KARL-ANTON

IPC: B01J23/40 ,  B01J23/42 ,  B01J23/46 ,  B01J23/56 ,  B01J23/89 ,  B01J35/02 ,  H01M4/92 ,  B01J37/03

Abstract: Platinum alloy catalyst contains 40-60 atom % Pt, 10-20 atom % Rh and 20-50 atom % Fe in the form of alloying particles of average diameter of less than 10 nm on an electrically conducting carbon support. An Independent claim is also included for the production of a Pt alloy catalyst comprising: (a) preparing a support suspension of the carbon support in water; (b) heating the suspension to the boiling point and maintaining at that temperature during the following steps; (c) adding aqueous solutions of hexachloroplatinic acid and rhodium chloride and also iron nitrate; precipitating out Pt, Rh and Fe by slowly adding caustic soda; (e) reducing the precipitated out compounds by adding an aqueous reductant; (f) removing the catalyst from the aqueous phase of the suspension; (g) drying the catalyst; (h) calcining the catalyst in an inert atmosphere at 700-1000o C for 0.5-2 hours; and (i) reducing the temperature from 700 to 500o C for a further 0.5-2 hours.