Anchoring MoS2 on an ethanol-etched Prussian blue analog for enhanced electrocatalytic efficiency for the oxygen evolution reaction

Poulami Mukherjee, Krishnamoorthy Sathiyan, R. S. Vishwanath, Tomer Zidki

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

Controllable defects and interface engineering are promising routes for developing efficient noble-metal-free electrocatalysts for the oxygen evolution reaction (OER), the bottleneck of overall water splitting. Herein, we prepared molybdenum disulfide (MoS2)-decorated hollow nanoframes of a Co-Fe Prussian blue analog (Etched-PBA-MoS2) by mild chemical etching of the Co-Fe Prussian blue analog (PBA) nanocubes, followed by MoS2 decoration. We propose using an ethanol-water mixture as a mild etchant, eliminating the need for a capping or stabilizing agent. Prominently benefiting from the enhanced active surface area and the synergistic effect of multi-components, the as-prepared Etched-PBA-MoS2 nanoframes deposited on a microporous carbon cloth could deliver an excellent OER activity with an overpotential of only 260 mV to obtain a current density of 10 mA cm−2 with a Tafel slope of 55 mV dec−1 in 1.0 M KOH. This work provides a protocol to rationally design PBA-based heterostructures for inexpensive electrocatalysts.

Original languageEnglish
Pages (from-to)1770-1778
Number of pages9
JournalMaterials Chemistry Frontiers
Volume6
Issue number13
DOIs
StatePublished - 17 May 2022

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