Proceedings of Materials for Sustainable Development Conference (MAT-SUS) (NFM22)
Publication date: 11th July 2022
Today's growing demand for energy consumption results in escalating amount of green-house gases emitted to the Earth's atmosphere, leading to harmful impact on the environment and global warming. Electrochemical water splitting to produce green H2 fuel is a promising approach for reducing fossil fuels usage. Oxygen Evolution Reaction (OER), the anodic water splitting half reaction, generally exhibits sluggish kinetics and thus determines the overall catalytic rate. Hence, currently this work focuses on designing new approaches to improve OER performance. Generally, Ni-Fe based oxides are known to be highly active Oxygen Evolution Reaction electrocatalysts. Here, we chose to construct a layered Ni-Fe oxide catalyst by modifying a 2D Metal-Organic Framework (MOF) porous scaffold. In that manner, one can avoid mass-transport limitation during electrocatalysis, and improve overall OER rates. Using post-synthetically MOF modification with varied Ni-to-Fe molar ratios, we are able to obtain tunable catalysts that despite low metal loadings reveal high intrinsic activity.
We would like to thank the Israel Science Foundation (ISF) for funding this research.
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