Dealloying-Induced Zeolite-like Metal Framework of AB2 Laves Phase Intermetallic Electrocatalysts

Shen Jing Ji; Li Wen Cao; Peng Zhang; Guan Bo Wang; Ying Rui Lu; Nian Tzu Suen; Sung Fu Hung; Hao Ming Chen

doi:10.1021/jacs.3c05287

Dealloying-Induced Zeolite-like Metal Framework of AB₂ Laves Phase Intermetallic Electrocatalysts

Shen Jing Ji, Li Wen Cao, Peng Zhang, Guan Bo Wang, Ying Rui Lu, Nian Tzu Suen^*, Sung Fu Hung^*, Hao Ming Chen^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

Exploring an efficient and robust electrocatalyst for hydrogen evolution reaction (HER) at high pH and temperature holds the key to the industrial application of alkaline water electrolysis (AWE). Herein, we design an open tunnel structure by dealloying a series of Laves phase intermetallics, i.e., MCo₂ and MRu_0.25Co_1.75 (M = Sc and Zr). The dealloying process can induce a zeolite-like metal framework for ScCo₂ and ScRu_0.25Co_1.75 by stripping Sc metal from the center of a tunnel structure. This structural engineering significantly lowers their overpotentials at a current density of 500 mA/cm² (η₅₀₀) ca. 80 mV in 1.0 M KOH. Through a simple process, ScRu_0.25Co_1.75 can be easily decorated on a carbon cloth substrate and only requires 132 mV to reach 500 mA/cm². More importantly it can maintain activity over 1000 h in industrial conditions (6.0 M KOH at 333 K), showing its potential for practical industrial applications.

Original language	English
Pages (from-to)	17892-17901
Number of pages	10
Journal	Journal of the American Chemical Society
Volume	145
Issue number	32
DOIs	https://doi.org/10.1021/jacs.3c05287
State	Published - 16 Aug 2023

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title = "Dealloying-Induced Zeolite-like Metal Framework of AB2 Laves Phase Intermetallic Electrocatalysts",

abstract = "Exploring an efficient and robust electrocatalyst for hydrogen evolution reaction (HER) at high pH and temperature holds the key to the industrial application of alkaline water electrolysis (AWE). Herein, we design an open tunnel structure by dealloying a series of Laves phase intermetallics, i.e., MCo2 and MRu0.25Co1.75 (M = Sc and Zr). The dealloying process can induce a zeolite-like metal framework for ScCo2 and ScRu0.25Co1.75 by stripping Sc metal from the center of a tunnel structure. This structural engineering significantly lowers their overpotentials at a current density of 500 mA/cm2 (η500) ca. 80 mV in 1.0 M KOH. Through a simple process, ScRu0.25Co1.75 can be easily decorated on a carbon cloth substrate and only requires 132 mV to reach 500 mA/cm2. More importantly it can maintain activity over 1000 h in industrial conditions (6.0 M KOH at 333 K), showing its potential for practical industrial applications.",

author = "Ji, {Shen Jing} and Cao, {Li Wen} and Peng Zhang and Wang, {Guan Bo} and Lu, {Ying Rui} and Suen, {Nian Tzu} and Hung, {Sung Fu} and Chen, {Hao Ming}",

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doi = "10.1021/jacs.3c05287",

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T1 - Dealloying-Induced Zeolite-like Metal Framework of AB2 Laves Phase Intermetallic Electrocatalysts

AU - Ji, Shen Jing

AU - Cao, Li Wen

AU - Zhang, Peng

AU - Wang, Guan Bo

AU - Lu, Ying Rui

AU - Suen, Nian Tzu

AU - Hung, Sung Fu

AU - Chen, Hao Ming

PY - 2023/8/16

Y1 - 2023/8/16

N2 - Exploring an efficient and robust electrocatalyst for hydrogen evolution reaction (HER) at high pH and temperature holds the key to the industrial application of alkaline water electrolysis (AWE). Herein, we design an open tunnel structure by dealloying a series of Laves phase intermetallics, i.e., MCo2 and MRu0.25Co1.75 (M = Sc and Zr). The dealloying process can induce a zeolite-like metal framework for ScCo2 and ScRu0.25Co1.75 by stripping Sc metal from the center of a tunnel structure. This structural engineering significantly lowers their overpotentials at a current density of 500 mA/cm2 (η500) ca. 80 mV in 1.0 M KOH. Through a simple process, ScRu0.25Co1.75 can be easily decorated on a carbon cloth substrate and only requires 132 mV to reach 500 mA/cm2. More importantly it can maintain activity over 1000 h in industrial conditions (6.0 M KOH at 333 K), showing its potential for practical industrial applications.

AB - Exploring an efficient and robust electrocatalyst for hydrogen evolution reaction (HER) at high pH and temperature holds the key to the industrial application of alkaline water electrolysis (AWE). Herein, we design an open tunnel structure by dealloying a series of Laves phase intermetallics, i.e., MCo2 and MRu0.25Co1.75 (M = Sc and Zr). The dealloying process can induce a zeolite-like metal framework for ScCo2 and ScRu0.25Co1.75 by stripping Sc metal from the center of a tunnel structure. This structural engineering significantly lowers their overpotentials at a current density of 500 mA/cm2 (η500) ca. 80 mV in 1.0 M KOH. Through a simple process, ScRu0.25Co1.75 can be easily decorated on a carbon cloth substrate and only requires 132 mV to reach 500 mA/cm2. More importantly it can maintain activity over 1000 h in industrial conditions (6.0 M KOH at 333 K), showing its potential for practical industrial applications.

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JO - Journal of the American Chemical Society

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ER -

Dealloying-Induced Zeolite-like Metal Framework of AB₂ Laves Phase Intermetallic Electrocatalysts

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