1D@2D Hierarchical Structures of Co(OH)x Nanosheets on NiMoOx Nanorods Can Mediate Alkaline Hydrogen Evolution with Industry-Level Current Density and Stability

No Thumbnail Available
File version
Author(s)
Sun, KZ
Wen, CF
Qu, X
Liu, PF
Yang, HG
Griffith University Author(s)
Primary Supervisor
Other Supervisors
Editor(s)
Date
2022
Size
File type(s)
Location
License
Abstract

Developing efficient electrocatalysts at ampere-scale current densities is of paramount importance to advance industrial applications of alkaline water electrolysis. Herein, a hierarchical nanostructured electrocatalyst with two-dimensional Co(OH)x nanosheets grown on one-dimensional NiMoOx nanorods over three-dimensional porous Ni foam substrate is designed. The resulting catalyst delivers ultrahigh hydrogen evolution reaction (HER) activity in the alkaline solution, which only requires overpotentials of 185 and 332 mV to achieve the current densities of −500 and −1000 mA cm–2 in 1.0 m KOH, respectively, and shows robust stability at −1000 mA cm–2 for 11 days. The unique 1D @ 2D hierarchical structures with abundant hetero-interfaces can not only expose sufficient active sites but also boost alkaline HER kinetics with fast water dissociation ability. This present work may pave a new insight to design efficient electrocatalysts with hierarchical structures for alkaline HER with industry-level current density and stability.

Journal Title
Small Methods
Conference Title
Book Title
Edition
Volume
Issue
Thesis Type
Degree Program
School
Publisher link
Patent number
Funder(s)
Grant identifier(s)
Rights Statement
Rights Statement
Item Access Status
Note
This publication has been entered in Griffith Research Online as an advanced online version.
Access the data
Related item(s)
Subject
Macromolecular and materials chemistry
Nanomaterials
Co(OH) x
alkaline hydrogen evolution reaction
hierarchical nanostructures
industry-level current density
water dissociation
Persistent link to this record
Citation
Sun, KZ; Wen, CF; Qu, X; Liu, PF; Yang, HG, 1D@2D Hierarchical Structures of Co(OH)x Nanosheets on NiMoOx Nanorods Can Mediate Alkaline Hydrogen Evolution with Industry-Level Current Density and Stability, Small Methods, 2022, pp. e2200484
Collections