Journal
ADVANCED ENERGY MATERIALS
Volume 10, Issue 39, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.202002285
Keywords
anion-exchange membranes; electrocatalysis; electrolyzers; NiMo; water splitting
Categories
Funding
- European Research Council [681292]
- European Research Council (ERC) [681292] Funding Source: European Research Council (ERC)
Ask authors/readers for more resources
Alkaline anion exchange membrane (AEM) water electrolysis is a promising technology for producing hydrogen using renewable energies. However, current AEM electrolyzers still employ noble-metal-containing electrocatalysts, or have significant overpotential loss, or both. Here non-noble-metal electrocatalysts for both the hydrogen and oxygen evolution reactions (HER and OER) are developed. Both catalysts are made of a same NiMo oxide. Judicious processing of these materials in a mixed NH3/H(2)atmosphere results in a NiMo-NH3/H(2)catalyst, which has superior activity in HER, delivering 500 mA cm(-2)at an overpotential of 107 mV. Doping Fe ions into the NiMo-NH3/H(2)catalyst yields an Fe-NiMo-NH3/H(2)catalyst, which is highly active for the OER, delivering 500 mA cm(-2)at an overpotential of 244 mV. These catalysts are integrated into an AEM electrolyzer, which delivers 1.0 A cm(-2)at 1.57 V at 80 degrees C in 1mKOH. The energy conversion efficiency at this current density is as high as 75%. This work demonstrates high-efficiency AEM electrolysis using earth-abundant catalytic materials.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available