Self-supported vanadium-incorporated cobalt phosphide as a highly efficient bifunctional electrocatalyst for water splitting

The development of bifunctional electrocatalysts for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) has recently attracted significant attention. Transition metal-based electrocatalysts have demonstrated a highly promising catalytic performance in electrochemical HER or OE...

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Bibliographic Details
Published in:Journal of alloys and compounds 2020-12, Vol.846, p.156350, Article 156350
Main Authors: Han, HyukSu, Yi, Feng, Choi, Seunggun, Kim, Jungin, Kwon, Jiseok, Park, Keemin, Song, Taeseup
Format: Article
Language:English
Subjects:
Bifunctional electrocatalyst
Catalysts
Catalytic activity
Cloth
Cobalt
CoP nanosheets
Electrocatalysts
Electronic structure
Hydrogen evolution reaction (HER)
Hydrogen evolution reactions
Oxygen evolution reaction (OER)
Oxygen evolution reactions
Phosphides
Transition metals
Vanadium
Water splitting
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Summary:The development of bifunctional electrocatalysts for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) has recently attracted significant attention. Transition metal-based electrocatalysts have demonstrated a highly promising catalytic performance in electrochemical HER or OER. Moreover, their electrocatalytic performance can be further improved using a self-supported structure of the electrocatalyst, owing to strong physicochemical contact between the catalyst and current collector. In this context, we propose vanadium-incorporated cobalt phosphide (CoVP) self-supported catalysts on carbon cloth (CoVP@CC) as highly efficient bifunctional electrocatalysts for alkaline HER and OER. In CoVP@CC, V plays a crucial role in modulating the surface electronic structure of the self-supported CoP nanosheets, leading to excellent catalytic activity in both HER and OER. The self-supported CoVP@CC demonstrates a promising overall water-splitting performance, requiring only 1.61 V to afford a current density of 10 mA cm−2. •V-incorporated CoP on carbon cloth (CoVP@CC) with a robust self-supported structure is prepared via wet chemistry.•V modulates the surface electronic structure of CoP nanosheets using a high electronic flexibility.•Self-supported CoVP@CC catalysts exhibits excellent catalytic performance for overall water splitting in alkaline media.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2020.156350