Electrolytic Conversion of Sacrificial Metal–OrganicFramework Thin Films into an Electrocatalytically ActiveMonolithic Oxide Coating for the Oxygen-EvolutionReaction
Begum, S. / Hashem, T. / Tsotsalas, M. / Wöll, C. / Alkordi, M. (2019)
Energy Technology, 2019, doi.org/10.1002/ente.201900967
- Date: September 2019
The electrolytic conversion of SURMOFs, monolithic surface‐anchored metal–organic framework (MOF) thin films, to yield Ni(OH)2 coatings for utilization as electrocatalysts in the water oxidation reaction is described. The electrocatalytic properties of the hydroxide coating, namely an oxygen‐evolving reaction (OER) onset overpotential of 330 mV and overpotential of only 440 mV at a current density of 10 mA cm−2, are well comparable to some of the most efficient materials used for the OER process. This electrolytic transformation process represents a facile pathway for the fabrication of electrochemically and electrocatalytically active coatings, and is potentially transferrable to several other systems. This approach is an attractive alternative to the commonly utilized, energy intensive pyrolysis, where heating the samples to temperatures above 600 °C is common to induce full transformation into electroactive catalysts.