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公开(公告)号：JP2013136842A
公开(公告)日：2013-07-11
申请号：JP2013038806
申请日：2013-02-28
Applicant: Evonik Degussa Gmbh , エボニック デグサ ゲーエムベーハーEvonik Degussa GmbH
Inventor： LEHMANN THOMAS DR , STENNER PATRICK
CPC classification number: C25B1/285
Abstract: PROBLEM TO BE SOLVED: To provide an industrial method for producing ammonium peroxodisulfate and alkali metal peroxodisulfate which is capable of completely eliminating the use of accelerators and is implemented when an electrolysis is of low current density.SOLUTION: In the case of the method for producing the peroxodisulfate, for example, ammonium peroxodisulfate, sodium peroxodisulfate, and potassium peroxodisulfate by anodically oxidizing an electrolyte containing sulfate and/or hydrogensulfate, a diamond layer, which is arranged on a conductive carrier and is made conductive by doping using a trivalent or pentavalent element, is used as an anode, and the accelerators are not added to an anolyte.
Abstract translation: 要解决的问题：提供一种能够完全消除促进剂的使用的过氧二硫酸铵和碱金属过硫酸氢盐的工业方法，并且在电解电流密度低时实施。解决方案：在生产方法的情况下 过氧二硫酸盐，例如过二硫酸铵，过二硫酸钠和过二硫酸钾，通过阳极氧化含有硫酸盐和/或硫酸氢盐的电解质，金刚石层，其布置在导电载体上并通过使用三价或五价元素掺杂而导电 ，用作阳极，并且加速剂不加入阳极电解液。
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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
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
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公开(公告)号：JPH10334925A
公开(公告)日：1998-12-18
申请号：JP13813098
申请日：1998-05-20
Applicant: DEGUSSA
Inventor： AUER EMMANUEL DR , FREUND ANDREAS DR , LEHMANN THOMAS DR , STARZ KARL-ANTON DR , SCHWARZ ROBERT DR , STENKE UDO DR
Abstract: PROBLEM TO BE SOLVED: To provide a platinum carrier catalyst for the anode of a PEM fuel cell having good resistance against poisoning from carbon monoxide by containing platinum and ruthenium crystallite mutually unalloyed and having specific sizes on a fine conductive carrier material. SOLUTION: A fine conductive carrier material made of carbon black, graphitized carbon black, graphite, or activated carbon is dispersed in water. The soluble compound aqueous solution of platinum and/or ruthenium is added to this suspension, it is adjusted to pH 7-9 by an alkaline solution, and a reducing agent containing aldehyde is added at a constant temperature of 50-80 deg.C. Platinum and/or ruthenium is reduced and completely deposited on the material, then are filtered, washed, and dried at 200 deg.C or below. The platinum and ruthenium of two noble metals are mutually unalloyed and highly dispersed on a carrier, and a CO-resistant platinum carrier catalyst having platinum crystallite below 2 nm and ruthenium crystallite below 1 nm is obtained.
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公开(公告)号：JP2002004073A
公开(公告)日：2002-01-09
申请号：JP2001119889
申请日：2001-04-18
Applicant: DEGUSSA
Inventor： LEHMANN THOMAS DR , STENNER PATRICK
Abstract: PROBLEM TO BE SOLVED: To provide an industrial method for preparing ammonium peroxodisulfate and alkaline metal peroxodisulfate which is capable of completely omitting the use of accelerators and is implemented when an electrolysis is of low current density. SOLUTION: In the case of the method for preparing the peroxodisulfate, for example, ammonium peroxodisulfate, sodium peroxodisulfate and potassium peroxodisulfate by anodically oxidizing an electrolyte containing sulfate and/or hydrogensulfate, a diamond layer which is arranged on a conductive carrier and is made conductive by doping using a tervalent or pentavalent element is used as an anode and the accelerators are not added to an anolyte.
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公开(公告)号：JPH11250918A
公开(公告)日：1999-09-17
申请号：JP35792398
申请日：1998-12-16
Applicant: DEGUSSA
Inventor： AUER EMMANUEL DR , BEHL WALTER , LEHMANN THOMAS DR , STENKE UDO
IPC: B01J23/40 , B01J23/42 , B01J23/46 , B01J35/00 , B01J35/06 , H01M4/86 , H01M4/88 , H01M4/92 , H01M8/10 , H01M8/1004 , H01M8/1018 , H01M8/1023 , H01M8/1039 , H01M8/12 , H01M8/02
Abstract: PROBLEM TO BE SOLVED: To improve resistance against carbon monoxide by using alloy grains having the average crystal size of a specific value, and forming an electric conductivity carrier material with carbon black, graphitized carbon black, graphite or activated carbon. SOLUTION: Alloy grains having the average crystal size of 0.5-2 nm are used for this alloy catalyst, e.g. a Pt/Ru alloy catalyst having alloy grains of 2 nm or below has very good CO resistance up to the carbon monoxide concentration of 150 ppm in combustion gas, however the electrochemical activity of the catalyst deteriorates when the grain size becomes below 0.5 nm. The carbon monoxide adsorbed to platinum atoms is brought into contact with ruthenium atoms during the diffusion process on the alloy grains, it is oxidized into carbon dioxide under its existence, and the platinum surface can be effectively regenerated. The ratio of platinum/ruthenium alloy grains is set to the concentration of 10-50 wt.% against the total weight of the alloy catalyst.
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Patent Agency Ranking
公开(公告)号：JP2002117865A
公开(公告)日：2002-04-19
申请号：JP2001129286
申请日：2001-04-26
Applicant: DMC2 DEGUSSA METALS CATALYSTS CERDEC AG
Inventor： ZUBER RALF DR , BAYER ARMIN , FEHL KNUT , BANISCH VOLKER , LEHMANN THOMAS DR
IPC: H01M4/96 , H01M8/0234 , H01M8/0239 , H01M8/0245 , H01M8/1004 , H01M8/02 , H01M8/10
Abstract: PROBLEM TO BE SOLVED: To provide an improved gas distribution structure for a polymer electrolyte-fuel cells, which avoids the fault of precedence technology, a gas diffusion electrode, and its manufacturing method. SOLUTION: The gas distribution structure for polymer electrolyte-fuel cells has a carbon carrier of a shape of a thin layer, which is made hydrophobic and makes two surface boundary, and a contact layer, which consists of a perfect mixture which consists of at least one sort of a hydrophobic polymer, and fine carbon particles, at the one side surface of the two surfaces. The hydrophobicity of the carbon carrier is generated by at least one sort of the hydrophobic polymer, and is limited to two layers. The above two layers go into a depth of 5 to 40 μm from the two surfaces of the carbon carrier, respectively, and fill up the fine hole capacity of the carbon carrier in the domain of the hydrophobic layer in 20 to 60%.
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7.发明专利
公开(公告)号：JPH1028833A
公开(公告)日：1998-02-03
申请号：JP8897197
申请日：1997-04-08
Applicant: DEGUSSA
Inventor： ENGEL DIETER DR , LEHMANN THOMAS DR , TROLL HARALD DR
Abstract: PROBLEM TO BE SOLVED: To ellectrochemically purify gas using a simple electrtolytic bath by making a counter electrode a gas diffusion electrode and installing a chamber having a gas supplying device and a gas discharging device on the opposite side of a fixed bed electrode of the counter electrode. SOLUTION: Gas to be purified and liquid electrolyte are led in a counter current or parallel current through the fixed bed electrode 10 of an electrolytic bath 1, and impurities are reacted at effective elctrolytic bath voltage, and electrochemically convertible impurities are removed electrolytically from gas. The electrolytic bath 1 is composed of the fixed electrode 10, a counter electrode 2 separated from the electrode 10 by a separator 4, liquid electrolyte supplying and discharging devices 17, 18, a raw gas inlet 19, a raw gas outlet 20, and a chamber 6 having a gas supplying and discharging devices 7, 8 to be attached to the counter electrode 2. The fixed electrode 10 is used as a dropping bed, raw gas is introduced from the inlet 19, electrolyte is introduced from the device 17 to be contacted in a parallel current or a counter current. In this process, hydrogen is supplied to a gas diffusion electrode 2 during reductive purification, while oxygen is supplied during oxidative purification.
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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
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.
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公开(公告)号：DE3603986A1
公开(公告)日：1987-08-13
申请号：DE3603986
申请日：1986-02-08
Applicant: DEGUSSA
Inventor： KOBERSTEIN EDGAR DR , LEHMANN THOMAS DR
Abstract: 1. A process for working up the solution - remaining after separation of the enzyme - from the enzymatic racemate resolution of an N-acetyl-DL-amino-carboxylic acid in the presence of an L-amino acid acylase by electrodialysis, characterized in that the electrodialysis unit used consists of a plurality of 3-chamber packs of which each in turn consists of a feed and diluate chamber (1), a concentrate chamber (2) on the cathode side and a concentrate chamber (3) on the anode side, each 3-chamber pack being separated from each of the two adjacent packs by a device (4) in which water is split into OH-ions and H+ ions and in that, on completion of electrodialysis, an aqueous solution of the L-amino acid and at most 50% of the anions originally present in the form of their salts is run off from the diluate chambers (1), an aqueous solution of the cations originally present in the form of hydroxides is run off from the concentrate chambers (2) on the cathode side and an aqueous solution of N-acetyl-D(L)-amino acid and acetic acid in the form of the free acids is run off from the concentrate chambers (3) on the anode side.
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公开(公告)号：ES2187108T3
公开(公告)日：2003-05-16
申请号：ES99117862
申请日：1999-09-10
Applicant: DEGUSSA
Inventor： LEHMANN THOMAS DR , STENNER PATRICK , KUVER ANDREAS DR
IPC: C02F1/467 , C25B9/23 , H01M8/1004 , C25B9/00
Abstract: An electrolysis cell has filled liquid electrolyte and oxidizing or reducing gas compartments, separated by a gas diffusion electrode on which an ion exchanging separator is formed (on the electrolyte side) by single- or multi-stage application of a solution of an ion exchanger material in a solvent, with at least partial evaporation of the solvent after each coating stage. An electrolysis cell for carrying out chemical reactions includes a liquid electrolyte compartment and an oxidizing or reducing gas compartment, having inlet and outlet lines for electrolyte and gas respectively. The two compartments each contain electrically conductive filler and are separated by a gas diffusion electrode (GDE), combined with an ion exchanging separator (IES) on the electrolyte side. A current collector for the GDE is provided. The filler in the electrolyte compartment serves as counter-electrode. The novel feature is that IES is applied to GDE by single- or multi-stage coating of the electro-catalytic layer of GDE with a solution of an ion exchanger material in a solvent, with at least partial evaporation of the solvent after each coating stage.
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