Journal Article

FZJ-2022-02875

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Fabrication of High Performing and Durable Nickel-Based Catalyst Coated Diaphragms for Alkaline Water Electrolyzers

Karacan, C. (Corresponding author)FZJ*RWTH* ; Lohmann-Richters, F. P. (Corresponding author)FZJ* ; Shviro, M.FZJ* ; Keeley, G. P. ; Müller, M.FZJ* ; Carmo, M.FZJ* ; Stolten, D.FZJ*RWTH*

2022
IOP Publishing Bristol

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Please use a persistent id in citations: http://hdl.handle.net/2128/31585  doi:10.1149/1945-7111/ac697f

Abstract: In this work, a catalyst coated-diaphragm (CCD) for classical alkaline electrolysis was prepared by the blade-coating method, using Raney nickel as HER catalyst and a Zirfon® (AGFA Perl UTP 500) diaphragm. Our best CCD reduced the overvoltage in an alkaline single cell by 270 mV at 300 mA cm−2 compared to the benchmark, mainly due to the higher catalytic activity and surface area of the Raney nickel electrode. The new electrode system also showed a low degradation rate of 22 μA cm−2 h−1 after 1000 h at a cell voltage of 2 V. The gas purity tests showed that the CCD has hydrogen in oxygen contamination well below the lower explosion limit, even at low current densities. Therefore, we propose the use of our novel CCD architecture for atmospheric alkaline electrolyzers, which have a partly separated electrolyte cycle

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Contributing Institute(s):

1. Elektrochemische Verfahrenstechnik (IEK-14)
2. Technoökonomische Systemanalyse (IEK-3)

Research Program(s):

1. 1231 - Electrochemistry for Hydrogen (POF4-123) (POF4-123)
2. 1111 - Effective System Transformation Pathways (POF4-111) (POF4-111)
3. 1112 - Societally Feasible Transformation Pathways (POF4-111) (POF4-111)

Appears in the scientific report 2022

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; Essential Science Indicators ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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