DE625174C - Electrodes, especially cathodes, for electrolytic cells for the decomposition of water - Google Patents

Electrodes, especially cathodes, for electrolytic cells for the decomposition of water

Info

Publication number
DE625174C
DE625174C DEB154102D DEB0154102D DE625174C DE 625174 C DE625174 C DE 625174C DE B154102 D DEB154102 D DE B154102D DE B0154102 D DEB0154102 D DE B0154102D DE 625174 C DE625174 C DE 625174C
Authority
DE
Germany
Prior art keywords
electrodes
water
cells
decomposition
electrolytic cells
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
DEB154102D
Other languages
German (de)
Inventor
Arnold Ewald Zdansky
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bamag Meguin AG
Original Assignee
Bamag Meguin AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bamag Meguin AG filed Critical Bamag Meguin AG
Priority to DEB154102D priority Critical patent/DE625174C/en
Application granted granted Critical
Publication of DE625174C publication Critical patent/DE625174C/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
    • C25B11/04—Electrodes; Manufacture thereof not otherwise provided for characterised by the material
    • C25B11/051—Electrodes formed of electrocatalysts on a substrate or carrier
    • C25B11/073—Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalyst material

Description

Elektroden, insbesondere Kathoden, für elektrolytische Zellen zur Wasserzersetzung Bekanntlich ist die Oberflächenbeschaffenheit der Elektroden, besonders der Kathoden, bei iebektrolytischen Zellen zur Wasserzersetzung von wesentlichen EinfllÜß auf die Größe der Brei rauhen Oberflächen der Elektroden wird die Zellenspannung, wie an sich bekannt ist, reduziert. Eine bloße mec'h'anische Aufrauhung genügt aber nicht. Es ist hekanntgleworden, auf den Elektroden auf !elektrolytischem Wege !einte ploröse Metallschicht zu ieraeugen; es hat sich aber gezeigt, daß. dieser Überzug nicht genügend dauerhaft ist.Electrodes, especially cathodes, for electrolytic cells for Water decomposition It is well known that the surface properties of the electrodes are special the cathodes, in electrolytic cells for the water decomposition of essential Influence on the size of the pulp rough surfaces of the electrodes is the cell voltage, as is known per se, reduced. A mere mec'h'an roughening is sufficient not. It has become known that electrodes were! United by electrolytic means Plorous metal layer to be seen; but it has been shown that. this coating is not sufficiently durable.

Gemäß der Erfindung besteht der Überzug aus einer Metall- bzw. aus einer Metalloxydschicht, die auf die Elektrodenplatten mittels des bekannten Metallspritzverfahrens aufgetragen worden ist. Die hierdurch :erhaltene disperse poröse Schicht ist außerordentlich. dauerhaft. Die Spannungsreduzierung der auf diese Weise behandelten (formierten) Elektroden gegenüber nichtformierten Elektroden ist .ganz erheblich: Der Effekt wird :noch ,erhöht, wenn beim Metallspritzen - mit stark oxydierendier Flamme gearbeitet wird.According to the invention, the coating consists of a metal or a metal oxide layer, which is applied to the electrode plates by means of the known metal spraying process has been applied. The resulting dispersed porous layer is extraordinary. continuous. The stress reduction of the (formed) treated in this way Electrodes compared to non-formed electrodes is quite significant: the effect is: still, increased, when working with metal spraying - with a strongly oxidizing flame will.

Wie Versuche ergeben haben, kommen die gemäß der Erfindung hergestellten Elektroden üi ihnen Eigenschaften völlig übierspannumgsfreien Elektroden sehr nahe, Die Spannung bei Zellen mit nichtformierten Elektroden liegt !etwa um 1/1o bis 2/IO V höher als bei Zellen mit Elektroden gemäß der Erfindung. Bei einer Stromdichte von -IoA/dm2 beträgt unter sonst gleichen Verhältnissera die Spannung bei Zellen mit nichtformierten Kafhoden 2,i¢5 V; bei Zellen mit Kathoden, die gemäß der vorliegenden Erfindung formiert wurden, nur 1,95o V bei einer Stromdichte von 15 A/dm2 2,22 V gegenüber 2,025 V, bei 2o A/dm2 2,315 V gegenüber 2"12 V. -Dieser Effekt der Zellen mit formierten Elektroden ist von !erheblicher wirtschaftlicher Bedeutung, denn er erlaubt bei gleicher Zellenspannung eine mehr als doppelte spezifsche Strombelastung solcher Zellen gegenüber Zellen mit nichtformierben Elektroden. Infolged,essien ist für die Herstellung einer bestimmten Wasserstoffmenge nur die halbe Anzahl Zellen als bisher erforderlich.As tests have shown, the electrodes produced according to the invention come very close to their properties with completely overvoltage-free electrodes. The voltage in cells with non-formed electrodes is about 1/10 to 2/10 V higher than for cells with electrodes according to the invention. At a current density of -IoA / dm2, all other things being equal, the voltage in cells with non-formed cells is 2, 1 ¢ 5 V; for cells with cathodes which have been formed according to the present invention, only 1.95o V at a current density of 15 A / dm2 2.22 V compared to 2.025 V, at 2o A / dm2 2.315 V compared to 2 "12 V. This effect of cells with formed electrodes is of considerable economic importance, because it allows a more than double specific current load of such cells compared to cells with non-formed electrodes with the same cell voltage. As a result, only half the number of cells is required for the production of a certain amount of hydrogen than before .

Claims (2)

PATENTANSPRÜCHE: i. Zur Verminderung der Überspannung !mit fein zerteiltem leitendem Material übezogene Elektroden, insbesondere Kathoden-. ; für Vorrichtungen zur elektrolytischen Zersetzung von Wasser, dadurch gelcennzeichnet, daß der Überzug aus !einer Metall-bzw. Metalloxydschcht besteht, die auf die Elektrodenplatten mittels des bekannten Metallspritzverfahrens aufgetragen ist PATENT CLAIMS: i. To reduce the overvoltage! With finely divided Conductive material covered electrodes, especially cathode. ; for fixtures for the electrolytic decomposition of water, characterized in that the coating from! a metal or. Metalloxydschcht consists, which means on the electrode plates the known metal spraying process is applied 2. Verfahren zur Herstellung der Elektroden nach Anspruch i, dadurch geldennzeichnet, daß bieim Metallspritzen mit stark - @oxydierender Flamme gearbeitet i wird.2. Method of manufacture of the electrodes according to claim i, characterized in that in the metal spraying I work with a strong @oxidizing flame.
DEB154102D 1931-09-15 1931-09-15 Electrodes, especially cathodes, for electrolytic cells for the decomposition of water Expired DE625174C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEB154102D DE625174C (en) 1931-09-15 1931-09-15 Electrodes, especially cathodes, for electrolytic cells for the decomposition of water

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB154102D DE625174C (en) 1931-09-15 1931-09-15 Electrodes, especially cathodes, for electrolytic cells for the decomposition of water

Publications (1)

Publication Number Publication Date
DE625174C true DE625174C (en) 1936-02-05

Family

ID=7002997

Family Applications (1)

Application Number Title Priority Date Filing Date
DEB154102D Expired DE625174C (en) 1931-09-15 1931-09-15 Electrodes, especially cathodes, for electrolytic cells for the decomposition of water

Country Status (1)

Country Link
DE (1) DE625174C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0067975A2 (en) * 1981-06-01 1982-12-29 Asahi Glass Company Ltd. Method for water electrolysis

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0067975A2 (en) * 1981-06-01 1982-12-29 Asahi Glass Company Ltd. Method for water electrolysis
EP0067975A3 (en) * 1981-06-01 1983-01-05 Asahi Glass Company Ltd. Method for water electrolysis

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