Issue 38, 2021

Facile synthesis of bimetallic-based CoMoO4/MoO2/CoP oxidized/phosphide nanorod arrays electroplated with FeOOH for efficient overall seawater splitting

Abstract

A hierarchical rod-array structure Mo and Co-based oxidized/phosphide electroplated with FeOOH (NF@P-S450@FeOOH) composites on Ni foam (NF) was prepared via facile hydrothermal and electrodeposition methods. The as-synthesized rod-arrays exhibited excellent electrocatalytic performance and favorable stability for the oxygen evolution reaction (OER) under an alkaline atmosphere (overpotential of 240.5 mV under 100 mA cm−2). After doping P into Mo and Co-based oxidized (S450) nanorods, excellent composites were developed for the hydrogen evolution reaction (HER) with an overpotential of 162.8 mV under 100 mA cm−2. Thus, an asymmetric setup composed of Mo and Co-based oxidized/phosphide (P-S450) nanorods and P-S450@FeOOH electrodes were constructed for overall seawater splitting, which delivered a potential of 1.828 V at 300 mA cm−2 in alkaline simulated seawater (1 M KOH + 0.5 M NaCl). This work may provide a new method for overall seawater splitting using the reasonable design and synthesis of non-noble metal composites.

Graphical abstract: Facile synthesis of bimetallic-based CoMoO4/MoO2/CoP oxidized/phosphide nanorod arrays electroplated with FeOOH for efficient overall seawater splitting

Article information

Article type
Paper
Submitted
06 jun 2021
Accepted
19 aug 2021
First published
21 aug 2021

CrystEngComm, 2021,23, 6778-6791

Facile synthesis of bimetallic-based CoMoO4/MoO2/CoP oxidized/phosphide nanorod arrays electroplated with FeOOH for efficient overall seawater splitting

P. Yang, C. Jin, M. Ren, H. Xing and J. Shi, CrystEngComm, 2021, 23, 6778 DOI: 10.1039/D1CE00748C

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