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

Do, Ha Huu, Hui, Kwun Nam, Vu, Pham Gia, Hui, Kwan San ORCID: and Dinh, Duc Anh (2023) MOF-derived copper selenides implanted in octahedral carbon matrix for efficient hydrogen evolution reaction. Journal of the Electrochemical Society, 170 (9). ISSN 0013-4651

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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.

Item Type: Article
Additional Information: Funding Information: This research was funded by Vietnam National Foundation for Science and Technology Development (NAFOSTED) under grant number 05/2019/TN. Publisher Copyright: © 2023 The Electrochemical Society (“ECS”). Published on behalf of ECS by IOP Publishing Limited.
Uncontrolled Keywords: electronic, optical and magnetic materials,renewable energy, sustainability and the environment,condensed matter physics,surfaces, coatings and films,electrochemistry,materials chemistry,sdg 7 - affordable and clean energy ,/dk/atira/pure/subjectarea/asjc/2500/2504
Faculty \ School: Faculty of Science > School of Engineering
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Depositing User: LivePure Connector
Date Deposited: 25 Apr 2024 10:31
Last Modified: 25 Apr 2024 10:31
DOI: 10.1149/1945-7111/acf527

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