Issue 26, 2021

Controllable design of 3D hierarchical Co/Ni-POM nanoflower compounds supported on Ni foam for the hydrogen evolution reaction

Abstract

Polyoxometalates (POMs) as precursors to form non-noble metal containing composites for the hydrogen evolution reaction (HER) have attracted an increasing amount of research attention, as they can be structurally modified at the molecular level without undergoing any structural changes upon multi-electron transfer. Herein, a novel mixed metal 3D nanoflower POM-based composite (Co/Ni-POM) on Ni foam (denoted as Co/Ni-POM/NFs) was prepared as an electrocatalyst for the HER, with tunable synthesis parameters. The optimized Co/Ni-POM/NF sample exhibits excellent catalytic activity and high stability, manifesting in an overpotential of only 68 mV for the HER (10 mA cm−2) and a Tafel slope of 60.8 mV dec−1 in 1 M KOH. The outstanding catalytic activity of Co/Ni-POM/NF stems from the synergistic effect between the metallic elements of the Co/Ni-POM and its large specific surface area. The Co/Ni-POM tightly riveted on nickel foam during the catalytic process also shows that the as-prepared catalyst is an excellent material for use in the HER.

Graphical abstract: Controllable design of 3D hierarchical Co/Ni-POM nanoflower compounds supported on Ni foam for the hydrogen evolution reaction

Supplementary files

Article information

Article type
Paper
Submitted
19 Apr 2021
Accepted
31 May 2021
First published
31 May 2021

New J. Chem., 2021,45, 11536-11543

Controllable design of 3D hierarchical Co/Ni-POM nanoflower compounds supported on Ni foam for the hydrogen evolution reaction

Z. Zhang, Y. Meng, H. Su, G. Dong, B. Zhao, W. Zhang, G. Yin and Y. Liu, New J. Chem., 2021, 45, 11536 DOI: 10.1039/D1NJ01910D

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