MOF-derived copper selenides implanted in octahedral carbon matrix for efficient hydrogen evolution reaction

Ha Huu Do, Kwun Nam Hui, Pham Gia Vu, Kwan San Hui, Duc Anh Dinh

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5 Citations (Scopus)

Abstract

The development of durable, efficient catalysts is vital in electrochemical water dissociation. Metal-organic frameworks (MOFs) based nanomaterials have been explored due to their well-distribution metal nodes and stability, but the shortage of efficient cathode compounds for electrochemical hydrogen evolving restricted their industrial applications. Herein, Cu2Se nanocrystals embedded in the octahedral carbon frameworks (Cu2Se/C) were fabricated using a copper-related MOF template through a one-step selenization technique. Interestingly, the catalytic efficacy of Cu2Se/C is better than that of Cu/C and Cu-MOF as catalysts for hydrogen generation in an acidic medium. In particular, Cu2Se/C shows a moderate overpotential of 220 mV at a current density of 10 mA cm−2 and a low Tafel slope of 54.5 mV dec−1. Also, this catalyst presents outstanding durability with 2000 cycling operations and 12 h of testing by chronoamperometry. The high efficiency is assigned to the synergistic effect of Cu2Se nanoparticles and carbon frameworks, which play essential roles in increasing exposed catalytic sites and protected active centers. The results may open potential direction to prepare economical hydrogen-evolving electrocatalysts.

Original languageEnglish
Article number093503
JournalJournal of the Electrochemical Society
Volume170
Issue number9
DOIs
Publication statusPublished - 8 Sep 2023

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