Epitaxial heterointerfacial electron bridge synchronizes oxygen evolution activity and stability on a layered double hydroxide surface

Wang, Jia; Zhao, Zelin; Guo, Min; Xiao, Liang; Tang, Haolin; Li, Jiantao; Kou, Zongkui; Li, Junsheng

doi:10.1039/d4ey00037d

EES. Catal.

2024

DOI: 10.1039/d4ey00037d

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Epitaxial heterointerfacial electron bridge synchronizes oxygen evolution activity and stability on a layered double hydroxide surface

Jia Wang,

Zelin Zhao,

Min Guo

et al.

Abstract: Scalable green hydrogen production via electrocatalytic water splitting is largely restricted by insufficient activity and stability of oxygen evolution reaction (OER) catalysts at the cathode. As a class of most...

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2D MOF Structure Tuning Atomic Ru Sites for Efficient and Robust Proton Exchange Membrane Water Electrolysis

Wang,

Zhao

et al. 2024

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Developing cost‐effective ruthenium (Ru)‐based HER electrocatalysts as alternatives to commercial Pt/C is crucial for the advancement of proton exchange membrane water electrolysis (PEMWE). However, the strong hydrogen adsorption of Ru‐based catalysts restricts its activity. Herein, a strategy is reported to tune the electronic structure and improve mass transfer by implanting Ru atoms onto the (002) facet of two‐dimensional zeolitic imidazolate framework‐67 (Ru@LZIF(002)) to optimize the d‐band center (εd) of Ru and the hydrogen spillover behavior. Benefiting from the ultrathin nanosheet structure and optimized εd of Ru, the over‐strong H adsorption energy is weakened and the electron/mass transfer is facilitated. Ru@LZIF(002) exhibits an overpotential of 9.2 mV at 10 mA cm−2 and a long‐lasting stability of 35 days at 100 mA cm−2. The mass activity and price activity of Ru@LZIF(002) is 2.9 and 14.7 times higher than Pt/C, respectively. More impressively, Ru@LZIF(002) delivers a cell voltage of 2.01 V at a high current density of 4 A cm−2 in PEMWE. The excellent long‐term durability of 1200 hours operating at 4 A cm−2 with an ultralow decay rate of 7.5 × 10−3 mV h−1 has been achieved, making it promising as a cost‐effective alternative to Pt/C catalyst for PEMWE applications.

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2D MOF Structure Tuning Atomic Ru Sites for Efficient and Robust Proton Exchange Membrane Water Electrolysis

Wang,

Zhao

et al. 2024

Small

View full text Add to dashboard Cite

show abstract

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Epitaxial heterointerfacial electron bridge synchronizes oxygen evolution activity and stability on a layered double hydroxide surface

Abstract: Scalable green hydrogen production via electrocatalytic water splitting is largely restricted by insufficient activity and stability of oxygen evolution reaction (OER) catalysts at the cathode. As a class of most...

Cited by 1 publication

References 84 publications

2D MOF Structure Tuning Atomic Ru Sites for Efficient and Robust Proton Exchange Membrane Water Electrolysis

2D MOF Structure Tuning Atomic Ru Sites for Efficient and Robust Proton Exchange Membrane Water Electrolysis

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