TY  - JOUR
AU  - Jiang, Wulyu
AU  - Faid, Alaa Y.
AU  - Gomes, Bruna Ferreira
AU  - Galkina, Irina
AU  - Xia, Lu
AU  - Lobo, Carlos Manuel Silva
AU  - Desmau, Morgane
AU  - Borowski, Patrick
AU  - Hartmann, Heinrich
AU  - Maljusch, Artjom
AU  - Besmehn, Astrid
AU  - Roth, Christina
AU  - Sunde, Svein
AU  - Lehnert, Werner
AU  - Shviro, Meital
TI  - Composition‐Dependent Morphology, Structure, and Catalytical Performance of Nickel–Iron Layered Double Hydroxide as Highly‐Efficient and Stable Anode Catalyst in Anion Exchange Membrane Water Electrolysis
JO  - Advanced functional materials
VL  - 32
IS  - 38
SN  - 1057-9257
CY  - Weinheim
PB  - Wiley-VCH
M1  - FZJ-2022-03762
SP  - 2203520 -
PY  - 2022
AB  - Water splitting is an environmentally friendly strategy to produce hydrogen but is limited by the oxygen evolution reaction (OER). Therefore, there is an urgent need to develop highly efficient electrocatalysts. Here, NiFe layered double hydroxides (NiFe LDH) with tunable Ni/Fe composition exhibit corresponding dependent morphology, layered structure, and chemical states, leading to higher activity and better stability than that of conventional NiFe LDH-based catalysts. The characterization data show that the low overpotentials (249 mV at 10 mA cm–2), ultrasmall Tafel slopes (24 mV dec–1), and high current densities of Ni3Fe LDH result from the larger fraction of trivalent Fe3+ and the optimized local chemical environment with more oxygen coordination and ordered atomic structure for the metal site. Owing to the active intermediate species, Ni(Fe)OOH, under OER conditions and a reversible dynamic phase transition during the cycling process, the Ni3Fe LDH achieves a high current density of over 2 A cm–2 at 2.0 V, and durability of 400 h at 1 A cm–2 in a single cell test. This work provides insights into the relationship between the composition, electronic structure of the layer, and electrocatalytic performance, and offers a scalable and efficient strategy for developing promising catalysts to support the development of the future hydrogen economy.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000823996200001
DO  - DOI:10.1002/adfm.202203520
UR  - https://juser.fz-juelich.de/record/910343
ER  -