Cu‐Doped Heterointerfaced Ru/RuSe2 Nanosheets with Optimized H and H2O Adsorption Boost Hydrogen Evolution Catalysis
Ruthenium chalcogenide is a highly promising catalytic system as a Pt alternative for hydrogen evolution reaction (HER). However, well‐studied ruthenium selenide (RuSe2) still exhibits sluggish HER kinetics in alkaline media due to the inappropriate adsorption strength of H and H2O. Herein, xx repor...
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Published in | Advanced materials (Weinheim) Vol. 35; no. 23 |
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Main Authors | , , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Weinheim
Wiley Subscription Services, Inc
08.06.2023
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Subjects | |
Online Access | Get full text |
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Summary: | Ruthenium chalcogenide is a highly promising catalytic system as a Pt alternative for hydrogen evolution reaction (HER). However, well‐studied ruthenium selenide (RuSe2) still exhibits sluggish HER kinetics in alkaline media due to the inappropriate adsorption strength of H and H2O. Herein, xx report a new design of Cu‐doped Ru/RuSe2 heterogeneous nanosheets (NSs) with optimized H and H2O adsorption strength for highly efficient HER catalysis in alkaline media. Theoretical calculations reveal that the superior HER performance is attributed to a synergistic effect of the unique heterointerfaced structure and Cu doping, which not only optimizes the electronic structure with a suitable d‐band center to suppress proton overbinding but also alleviates the energy barrier with enhanced H2O adsorption. As a result, Cu‐doped heterogeneous Ru/RuSe2 NSs exhibit a small overpotential of 23 mV at 10 mA cm−2, a low Tafel slope of 58.5 mV dec−1 and a high turnover frequency (TOF) value of 0.88 s−1 at 100 mV for HER in alkaline media, which is among the best catalysts in noble metal‐based electrocatalysts toward HER. The present Cu‐doped Ru/RuSe2 NSs interface catalyst is very stable for HER by showing no activity decay after 5000‐cycle potential sweeps. This work heralds that heterogeneous interface modulation opens up a new strategy for the designing of more efficient electrocatalysts.
A class of Cu‐doped Ru/RuSe2 heterogeneous nanosheets for highly efficient hydrogen evolution reaction (HER) in alkaline media is designed and synthesized. The superior HER performance is attributed to a synergistic effect of the unique heterogeneous interface structure and Cu doping, which leads to the optimized H and H2O adsorption to boost hydrogen evolution catalysis. |
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ISSN: | 0935-9648 1521-4095 |
DOI: | 10.1002/adma.202300980 |