Molybdenum triggers the bifunctional mechanism of oxygen evolution reaction of Fe34-xNi25Co25MoxB8P8amorphous alloy with boosted catalytic activity

High-valence metals (such as, Mo, W, Zr and Nb) have recently been reported that promote oxygen evolution reaction (OER) activity of the 3d-transition metal electrocatalysts. These high-valence metals play a key role on surface self-reconstruction process and stabilizing the low-valence active sites...

Full description

Saved in:
Bibliographic Details
Published inJournal of electroanalytical chemistry (Lausanne, Switzerland) Vol. 972; p. 118612
Main Authors Wu, Yong, Guo, Xiaolong, Chen, Hongguo, Xin, Yuci, Dong, Xing’an, Hu, Xiaolin, Xia, Lei, Yu, Peng
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.11.2024
Subjects
Amorphous electrocatalysts
High-valence metals
Molybdenum
OER mechanism
Oxygen evolution reaction
OER mechanism
High-valence metals
Amorphous electrocatalysts
Oxygen evolution reaction
Molybdenum
Online AccessGet full text

Cover

More Information
Summary:High-valence metals (such as, Mo, W, Zr and Nb) have recently been reported that promote oxygen evolution reaction (OER) activity of the 3d-transition metal electrocatalysts. These high-valence metals play a key role on surface self-reconstruction process and stabilizing the low-valence active sites. However, further understand their effect on the OER mechanism is challenging, especially in amorphous electrocatalysts with complicated structure. Here, we integrate high-valence Mo with 3d metals (Fe, Co and Ni), fabricating Fe34-xCo25Ni25MoxP8B8 amorphous electrocatalysts by the melt-spinning method. We employ in-situ Raman spectroscopy to characterize the species evolution during OER, and find that the higher OER performance is originated from a bifunctional mechanism involves two catalytic sites (NiOOH and FeOOH) enabled by high-valence Mo dissolution. Benefit from this, the Fe34-xCo25Ni25MoxP8B8 with Mo show higher OER performance compared with Fe34-xCo25Ni25MoxP8B8 without Mo. For 3d-metal OER electrocatalyst, this study provides a new understanding on the effect of high-valence metals.
ISSN:1572-6657
DOI:10.1016/j.jelechem.2024.118612