Ultrafast H-Spillover in Intermetallic PtZn Induced by the Local Disorder for Excellent Electrocatalytic Hydrogen Evolution Performance

Meiling Wang; Zhengju Shi; Wenwen Shi; Jingyun Jiang; Jianhong Lan; Ruizhen Li; Yuanyuan Yan; Zhenyu Liu; Longyi Fu; Xuguang Liu; Shengbo Sang; Yingjie Hu; Jiadong Zhou

doi:10.1002/adma.202409575

Ultrafast H-Spillover in Intermetallic PtZn Induced by the Local Disorder for Excellent Electrocatalytic Hydrogen Evolution Performance

Meiling Wang^*, Zhengju Shi, Wenwen Shi, Jingyun Jiang, Jianhong Lan, Ruizhen Li, Yuanyuan Yan, Zhenyu Liu, Longyi Fu, Xuguang Liu, Shengbo Sang^*, Yingjie Hu^*, Jiadong Zhou^*

^*Corresponding author for this work

School of Physics

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

6 Citations (Scopus)

Abstract

Ordered intermetallic Platinum-Zinc (PtZn) shows potential in hydrogen evolution reaction (HER), but faces a huge challenge in activity enhancement due to the H-repulsion properties of Zinc (Zn). Here, local disorder in ordered intermetallic PtZn nanoparticles confined in N-doped porous carbon (I-PtZn@NPC) via a confinement-high-temperature pyrolysis strategy is realized to boost the HER performance. Experiments and calculations demonstrate that the local substitution of Pt atoms for Zn atoms creates an ultra-short H-spillover channel (Pt site→Pt-Zn bridge site →Zn site). Benefiting from such an ultra-fast H-migration from Pt site to Zn site, I-PtZn@NPC exhibits enhanced intrinsic activity with an ultralow overpotential (η₁₀: 2.3 mV, η₁₀₀: 24 mV) than commercial Pt black catalyst. Furthermore, a 25 cm² commercial proton exchange membrane (PEM) electrolyzer equipped with I-PtZn@NPC achieved stable operation at 1.60 V_cell for 200 h at a current density of 1 A cm⁻². This design of local Zn disorder in the ordered intermetallic PtZn sheds new light on the rational development of efficient Zn-based alloy HER electrocatalysts.

Original language	English
Article number	2409575
Journal	Advanced Materials
Volume	37
Issue number	3
DOIs	https://doi.org/10.1002/adma.202409575
Publication status	Published - 22 Jan 2025

Keywords

electrocatalytic hydrogen evolution
intermetallic PtZn
local disorder
ultrafast H-spillover

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10.1002/adma.202409575

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title = "Ultrafast H-Spillover in Intermetallic PtZn Induced by the Local Disorder for Excellent Electrocatalytic Hydrogen Evolution Performance",

abstract = "Ordered intermetallic Platinum-Zinc (PtZn) shows potential in hydrogen evolution reaction (HER), but faces a huge challenge in activity enhancement due to the H-repulsion properties of Zinc (Zn). Here, local disorder in ordered intermetallic PtZn nanoparticles confined in N-doped porous carbon (I-PtZn@NPC) via a confinement-high-temperature pyrolysis strategy is realized to boost the HER performance. Experiments and calculations demonstrate that the local substitution of Pt atoms for Zn atoms creates an ultra-short H-spillover channel (Pt site→Pt-Zn bridge site →Zn site). Benefiting from such an ultra-fast H-migration from Pt site to Zn site, I-PtZn@NPC exhibits enhanced intrinsic activity with an ultralow overpotential (η10: 2.3 mV, η100: 24 mV) than commercial Pt black catalyst. Furthermore, a 25 cm2 commercial proton exchange membrane (PEM) electrolyzer equipped with I-PtZn@NPC achieved stable operation at 1.60 Vcell for 200 h at a current density of 1 A cm⁻2. This design of local Zn disorder in the ordered intermetallic PtZn sheds new light on the rational development of efficient Zn-based alloy HER electrocatalysts.",

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author = "Meiling Wang and Zhengju Shi and Wenwen Shi and Jingyun Jiang and Jianhong Lan and Ruizhen Li and Yuanyuan Yan and Zhenyu Liu and Longyi Fu and Xuguang Liu and Shengbo Sang and Yingjie Hu and Jiadong Zhou",

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T1 - Ultrafast H-Spillover in Intermetallic PtZn Induced by the Local Disorder for Excellent Electrocatalytic Hydrogen Evolution Performance

AU - Wang, Meiling

AU - Shi, Zhengju

AU - Shi, Wenwen

AU - Jiang, Jingyun

AU - Lan, Jianhong

AU - Li, Ruizhen

AU - Yan, Yuanyuan

AU - Liu, Zhenyu

AU - Fu, Longyi

AU - Liu, Xuguang

AU - Sang, Shengbo

AU - Hu, Yingjie

AU - Zhou, Jiadong

PY - 2025/1/22

Y1 - 2025/1/22

N2 - Ordered intermetallic Platinum-Zinc (PtZn) shows potential in hydrogen evolution reaction (HER), but faces a huge challenge in activity enhancement due to the H-repulsion properties of Zinc (Zn). Here, local disorder in ordered intermetallic PtZn nanoparticles confined in N-doped porous carbon (I-PtZn@NPC) via a confinement-high-temperature pyrolysis strategy is realized to boost the HER performance. Experiments and calculations demonstrate that the local substitution of Pt atoms for Zn atoms creates an ultra-short H-spillover channel (Pt site→Pt-Zn bridge site →Zn site). Benefiting from such an ultra-fast H-migration from Pt site to Zn site, I-PtZn@NPC exhibits enhanced intrinsic activity with an ultralow overpotential (η10: 2.3 mV, η100: 24 mV) than commercial Pt black catalyst. Furthermore, a 25 cm2 commercial proton exchange membrane (PEM) electrolyzer equipped with I-PtZn@NPC achieved stable operation at 1.60 Vcell for 200 h at a current density of 1 A cm⁻2. This design of local Zn disorder in the ordered intermetallic PtZn sheds new light on the rational development of efficient Zn-based alloy HER electrocatalysts.

AB - Ordered intermetallic Platinum-Zinc (PtZn) shows potential in hydrogen evolution reaction (HER), but faces a huge challenge in activity enhancement due to the H-repulsion properties of Zinc (Zn). Here, local disorder in ordered intermetallic PtZn nanoparticles confined in N-doped porous carbon (I-PtZn@NPC) via a confinement-high-temperature pyrolysis strategy is realized to boost the HER performance. Experiments and calculations demonstrate that the local substitution of Pt atoms for Zn atoms creates an ultra-short H-spillover channel (Pt site→Pt-Zn bridge site →Zn site). Benefiting from such an ultra-fast H-migration from Pt site to Zn site, I-PtZn@NPC exhibits enhanced intrinsic activity with an ultralow overpotential (η10: 2.3 mV, η100: 24 mV) than commercial Pt black catalyst. Furthermore, a 25 cm2 commercial proton exchange membrane (PEM) electrolyzer equipped with I-PtZn@NPC achieved stable operation at 1.60 Vcell for 200 h at a current density of 1 A cm⁻2. This design of local Zn disorder in the ordered intermetallic PtZn sheds new light on the rational development of efficient Zn-based alloy HER electrocatalysts.

KW - electrocatalytic hydrogen evolution

KW - intermetallic PtZn

KW - local disorder

KW - ultrafast H-spillover

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Ultrafast H-Spillover in Intermetallic PtZn Induced by the Local Disorder for Excellent Electrocatalytic Hydrogen Evolution Performance

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