Synergistic effect of V and Fe in Ni/Fe/V ternary layered double hydroxides for efficient and durable oxygen evolution reaction

High-performance and stable electrocatalysts are vital for the oxygen evolution reaction (OER). Herein, via a one-pot hydrothermal method, Ni/Fe/V ternary layered double hydroxides (NiFeV-LDH) derived from Ni foam are fabricated to work as highly active and durable electrocatalysts for OER. By chang...

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Bibliographic Details
Published in:Frontiers of chemical science and engineering 2023, Vol.17 (1), p.102-115
Main Authors: Chen, Lihong, Deng, Ruxin, Guo, Shaoshi, Yu, Zihuan, Yao, Huiqin, Wu, Zhenglong, Shi, Keren, Li, Huifeng, Ma, Shulan
Format: Article
Language:English
Subjects:
Bimetals
Chemistry
Chemistry and Materials Science
Current density
Durability
Electrocatalysts
Hydroxides
Industrial Chemistry/Chemical Engineering
Iron
Metal foams
Nanotechnology
Nickel
Oxygen evolution reactions
Research Article
Synergistic effect
Valence
Voltammetry
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Summary:High-performance and stable electrocatalysts are vital for the oxygen evolution reaction (OER). Herein, via a one-pot hydrothermal method, Ni/Fe/V ternary layered double hydroxides (NiFeV-LDH) derived from Ni foam are fabricated to work as highly active and durable electrocatalysts for OER. By changing the feeding ratio of Fe and V salts, the prepared ternary hydroxides were optimized. At an Fe:V ratio of 0.5:0.5, NiFeV-LDH exhibits outstanding OER activity superior to that of the binary hydroxides, requiring overpotentials of 269 and 274 mV at 50 mA·cm −2 in the linear sweep voltammetry and sampled current voltammetry measurements, respectively. Importantly, NiFeV-LDH shows extraordinary long-term stability (⩾ 75 h) at an extremely high current density of 200 mA·cm −2 . In contrast, the binary hydroxides present quick decay at 200 mA·cm −2 or even reduced current densities (150 and 100 mA·cm −2 ). The outstanding OER performance of NiFeV-LDH benefits from the synergistic effect of V and Fe while doping the third metal into bimetallic hydroxide layers: (a) Fe plays a crucial role as the active site; (b) electron-withdrawing V stabilizes the high valence state of Fe, thus accelerating the OER process; (c) V further offers great stabilization for the formed intermediate of FeOOH, thus achieving superior durability.
ISSN:2095-0179
2095-0187
DOI:10.1007/s11705-022-2179-6