Etching-assisted synthesis of Ni/Ni single atom anchored porous graphitic nanocarbon for improved hydrogen evolution reaction

The development of single-atom catalysts (SACs) offers a novel strategy to minimize catalyst loadings while maintaining high electrocatalytic activity. Herein, a novel Ni/Ni single atom anchored porous graphitic nanocarbon (Ni/Ni -SA -NC) is synthesized by an alkali-assisted etching approach combine...

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Bibliographic Details
Published in:New journal of chemistry 2023-10, Vol.47 (38), p.17657-17665
Main Authors: Feng, Liangliang, Li, Yuhang, Fu, Changle, Li, Dongming, Huang, Jianfeng, Yin, Hongyan, Cao, Liyun, He, Danyang
Format: Article
Language:English
Subjects:
Electrocatalysts
Energy conversion
Energy storage
Etching
Hydrogen evolution reactions
Hydrogen production
Single atom catalysts
Synthesis
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Summary:The development of single-atom catalysts (SACs) offers a novel strategy to minimize catalyst loadings while maintaining high electrocatalytic activity. Herein, a novel Ni/Ni single atom anchored porous graphitic nanocarbon (Ni/Ni -SA -NC) is synthesized by an alkali-assisted etching approach combined with post-calcination protocol. It is manifested that the in situ formed AlN not only can function as a template for the generation of porous nanoarchitecture but can also serve as an anchoring agent for synthesized Ni-N x species. Benefitting from the high specific surface area, abundant electroactive sites, and highly conductive graphitic carbon matrix, the fabricated Ni/Ni -SA -NC displays superior HER performances with a quite low overpotential of 159 mV to achieve a current density of 10 mA cm −2 , far outperforming the Ni/C counterpart and long-term stability for over 50 h with unnoticeable current fluctuation in alkaline medium. Our work inspires the exploration of remarkable SACs electrocatalysts for cost-effective and large-scale hydrogen production in the energy conversion and storage field. A novel Ni/Ni single atom anchored porous graphitic nanocarbon exhibited remarkable electrocatalytic performance for hydrogen production.
ISSN:1144-0546
1369-9261
DOI:10.1039/d3nj03148a