In:
Advanced Materials, Wiley, Vol. 34, No. 20 ( 2022-05)
Abstract:
Developing an efficient and non‐precious pH‐universal hydrogen evolution reaction electrocatalyst is highly desirable for hydrogen production by electrochemical water splitting but remains a significant challenge. Herein, a hierarchical structure composed of heterostructured Ni 2 P‐Ni 12 P 5 nanorod arrays rooted on Ni 3 S 2 film (Ni 2 P‐Ni 12 P 5 @Ni 3 S 2 ) via a simultaneous corrosion and sulfidation is built followed by a phosphidation treatment toward the metallic nickel foam. The combination of theoretical calculations with in/ex situ characterizations unveils that such a unique sequential phase conversion strategy ensures the strong interfacial coupling between Ni 2 P and Ni 12 P 5 as well as the robust stabilization of 1D heteronanorod arrays by Ni 3 S 2 film, resulting in the promoted water adsorption/dissociation energy, the optimized hydrogen adsorption energy, and the enhanced electron/proton transfer ability accompanied with an excellent stability. Consequently, Ni 2 P‐Ni 12 P 5 @Ni 3 S 2 /NF requires only 32, 46, and 34 mV overpotentials to drive 10 mA cm −2 in 1.0 m KOH, 0.5 m H 2 SO 4 , and 1.0 m phosphate‐buffered saline electrolytes, respectively, exceeding almost all the previously reported non‐noble metal‐based electrocatalysts. This work may pave a new avenue for the rational design of non‐precious electrocatalysts toward pH‐universal hydrogen evolution catalysis.
Type of Medium:
Online Resource
ISSN:
0935-9648
,
1521-4095
DOI:
10.1002/adma.202107548
Language:
English
Publisher:
Wiley
Publication Date:
2022
detail.hit.zdb_id:
1474949-X
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