EP 3912210 A1 20211124 - ELECTROCHEMICAL GAS PRODUCTION CELL, IN PARTICULAR A MERCURY-FREE HYDROGEN PRODUCTION CELL
Title (en)
ELECTROCHEMICAL GAS PRODUCTION CELL, IN PARTICULAR A MERCURY-FREE HYDROGEN PRODUCTION CELL
Title (de)
ELEKTROCHEMISCHE GASENTWICKLUNGSZELLE, INSBESONDERE QUECKSILBERFREIE WASSERSTOFFENTWICKLUNGSZELLE
Title (fr)
CELLULE GÉNÉRATRICE DE GAZ ÉLECTROCHIMIQUE, EN PARTICULIER CELLULE GÉNÉRATRICE D'HYDROGÈNE SANS MERCURE
Publication
Application
Priority
- EP 19151868 A 20190115
- EP 2019085689 W 20191217
Abstract (en)
[origin: WO2020148058A1] The problem addressed by the present invention is that of providing an electrochemical cell, and in particular a mercury-free hydrogen production cell, which is free of Raney nickel and can correspond to the electrochemical gas production cells that have hitherto been produced using Raney nickel in terms of a blank gassing rate and the other electrochemical characteristics. The problem is solved according to the invention by means of an electrochemical gas production cell (2), in particular a mercury-free hydrogen production cell, which comprises a metal anode (10), an electrolyte (14) and a gas diffusion electrode (20). The gas diffusion electrode (10) has, as a metal-containing main component, a steel alloy and/or a catalytic inorganic metal compound and/or platinum powder or palladium powder, and all the aforementioned materials are free of Raney nickel. Avoiding Raney nickel provides increased industrial safety. The identified substitute materials have significantly fewer risks with regard to transportation, fire hazard and toxicology. The necessary preventative measures therefore require substantially less outlay. The amount of nickel used (in the event that a nickel-containing compound is used) is at least 2 factors lower or tends towards zero. The identified substitute materials exhibit good to very good electrochemical activity and result in hydrogen production cells of which the efficiency of hydrogen production and stability are as adequate as cells which are fitted with a cathode containing Raney nickel.
IPC 8 full level
H01M 4/42 (2006.01); C25B 1/02 (2006.01); C25B 5/00 (2006.01); H01M 8/0656 (2016.01); H01M 12/06 (2006.01)
CPC (source: EP US)
C25B 1/02 (2013.01 - US); C25B 11/032 (2021.01 - US); C25B 11/065 (2021.01 - US); C25B 11/091 (2021.01 - US); H01M 4/42 (2013.01 - EP); H01M 8/0656 (2013.01 - EP); H01M 12/06 (2013.01 - EP); Y02E 60/10 (2013.01 - EP); Y02E 60/36 (2013.01 - EP); Y02E 60/50 (2013.01 - EP)
Citation (search report)
See references of WO 2020148058A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
EP 3683875 A1 20200722; CN 113574703 A 20211029; EP 3912210 A1 20211124; US 2022081791 A1 20220317; WO 2020148058 A1 20200723
DOCDB simple family (application)
EP 19151868 A 20190115; CN 201980089029 A 20191217; EP 19818143 A 20191217; EP 2019085689 W 20191217; US 201917422836 A 20191217