Prussian-blue-analogue derived FeNi2S4/NiS nanoframes supported by N-doped graphene for highly efficient methanol oxidation electrocatalysis

Kefu Zhang; Yongqi Deng; Yihan Wu; Lele Wang; Lifeng Yan

doi:10.1016/j.jcis.2023.05.150

Prussian-blue-analogue derived FeNi₂S₄/NiS nanoframes supported by N-doped graphene for highly efficient methanol oxidation electrocatalysis

J Colloid Interface Sci. 2023 Oct:647:246-254. doi: 10.1016/j.jcis.2023.05.150. Epub 2023 May 24.

Authors

Kefu Zhang¹, Yongqi Deng¹, Yihan Wu¹, Lele Wang¹, Lifeng Yan²

Affiliations

¹ Department of Chemical Physics, Key Laboratory of Precision and Intelligent Chemistry, University of Science and Technology of China, Jinzairoad 96, Hefei 230026, Anhui, China.
² Department of Chemical Physics, Key Laboratory of Precision and Intelligent Chemistry, University of Science and Technology of China, Jinzairoad 96, Hefei 230026, Anhui, China. Electronic address: lfyan@ustc.edu.cn.

PMID: 37253293
DOI: 10.1016/j.jcis.2023.05.150

Abstract

The design of effective and robust non-noble metal electrocatalysts to enhance catalytic reaction kinetic is critical to promote methanol oxidation catalysis. Herein, hierarchical Prussian blue analogue (PBA)-derived sulfide heterostructures supported by N-doped graphene (FeNi₂S₄/NiS-NG) as efficient catalysts have been developed for methanol oxidation reaction (MOR). Benefiting from the merits of hollow nanoframes structure and heterogeneous sulfide synergy, FeNi₂S₄/NiS-NG composite not only possesses abundant active sites to boost the catalytic properties but also alleviates the CO poisoning effect during the process exhibiting favorable kinetic behavior toward MOR. Specifically, the remarkable catalytic activity (97.6 mA cm^-2/1544.3 mA mg^-1) of FeNi₂S₄/NiS-NG for methanol oxidation was achieved, superior to most reported non-noble electrocatalysts. Additionally, the catalyst showed competitive electrocatalytic stability, with a current density of over 90% after 2000 consecutive CV cycles. This study offers promising insights into the rational modulation of the morphology and components of precious-metal-free catalysts for fuel cell applications.

Keywords: Catalyst; FeNi(2)S(4)/NiS; Graphene; Methanol oxidation; Nanoframes; PBA.