Journal
ACS ENERGY LETTERS
Volume 7, Issue 10, Pages 3415-3422Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsenergylett.2c01820
Keywords
AMP Exception; AMP Exception
Categories
Funding
- German Research Foundation (DFG)
- federal ministry for education, research and development (Bundesmi-nisterium fu?r Bildung und Forschung, BMBF)
- federal ministry for economic affairs and energy (Bundesministerium fu?r Wirtschaft und Energie, BMWi)
- European Union?s HORIZON.3.1-The European Innovation Council (EIC) Programme
- [STR 596/12-1]
- [03SF0613D]
- [03SF0611A]
- [101071111-ANEMEL]
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This study investigates the performance of highly active anion-tuned catalysts in water electrolysis and finds significant improvements in catalytic activity in three-electrode setups. However, there are limitations in scaling the performance to single cells.
Anion exchange membrane water electrolysis (AEMWE) is an attractive emerging green hydrogen technology. However, the scaling of trends in activity of anode catalysts for the oxygen evolution reaction (OER) from a liquid-electrolyte, three-electrode environment to the two -electrode single-cell format has remained poorly considered. Herein, we critically investigate the scaling of kinetic and catalytic properties of a family of highly active Ni foam (NF) supported, anion (A???)-tuned NiFe(-A???)-OER catalysts. Trends in catalytic activity suggest impressive improvements of up to 91-fold in three-electrode setups (3LC) compared to uncoated NF. While we demonstrate the successful qualitative structure???performance tunability in a 5 cm2 AEMWE single cell, we also find serious limitations in the quantitative predictability of three -electrode setups for single-cell performance trends. Cell environments appear to equalize the cell performances of designer catalysts, which has important ramifications for electrode development. We succeed in analyzing and discussing some of these translation limitations in terms of previously overlooked effects summarized in the activity improvement factor f.
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