A Supramolecular Coordination‐Polymer‐Derived Electrocatalyst for the Oxygen Evolution Reaction

Abstract

An iron oxide decorated nickel iron alloy nanoparticle/porous graphene hybrid exhibits high electrocatalytic activity and excellent durability toward oxygen evolution reaction (OER). It displays a low overpotential of 274 mV at 10 mA cm−2, and low Tafel slope of 37 mV dec−1, showing a superior performance to the state‐of‐the‐art RuO2 OER electrocatalyst.

Alternate Restacking of 2 D CoNi Hydroxide and Graphene Oxide Nanosheets for Energetic Oxygen Evolution

“…For electrocatalytic water oxidation, owing to the united merits of superlattice heterostructure and composition tuning, Co 2/3 Ni 1/3 -NS-GO superlattice in this work outperformed congeneric transition metal hydroxide-based electrocatalysts, such as CoNi hydroxide nanoplates, [23] Fe-doped Co(OH) 2 nanosheets, [24] NiFeCr LDH, [25] and restacking NiAl LDH/MoS 2 and NiFe LDH/MoS 2 superlattices, [26] as well as other outstanding electrocatalysts, such as NiFe@N-doped graphene (NiFe@NC), [27] black phosphorus (BP), [28] hollow NiCo 2 O 4 microcuboids, [21] and FeNi 3 /Fe 3 O 4 . [29]…”

The electronic structure of transition metal oxides for oxygen evolution reaction

“…Numerous novel materials have emerged as advanced OER catalysts such as metal chalcogenide, [21][22][23] oxides, 24,25 nitrids 26,27 and molecular/polymeric systems. 28,29 Ruand Ir-based oxides are OER catalysts of high industrial relevance because their high activity in acidic media and implementation in proton-exchange membrane electrolysers. 30,31 However, both RuO 2 and IrO 2 undergo further oxidation and subsequent dissolution in acidic electrolytes under high applied potentials, 32,33 leading to unstable performance during water electrolysis.…”

Transforming lignin into porous graphene via direct laser writing for solid-state supercapacitors

“…LIG has been used for various applications, such as supercapacitors, microuidic devices, catalysts, and pressure sensors. 14,19,20 LIG-based SCs were shown to have high capacitance due to hierarchical porous structures and high conductivity. 16,21 They offer more energy or power density or both than commercial aluminum electrolytic capacitors, thin lm lithium-ion batteries, and activated-carbon supercapacitors.…”