Pristine
Ru generally shows unsatisfying activity for the electrocatalytic
hydrogen evolution reaction (HER). How to activate its HER activity
through facile methodologies is very challenging. Recently, metal-supported
electrocatalysts integrating metals with efficient hydrogen adsorption
and supports with facile hydrogen desorption delivered a high HER
performance through a metal-to-support hydrogen spillover process,
where the small metal–support work function difference (ΔΦ)
was identified as the criterion for the successful interfacial hydrogen
spillover. Herein, we demonstrate that a hydrogen spillover strategy
significantly boosts the HER activity of Ru by depositing a Ru1Fe1 alloy on CoP (Ru1Fe1/CoP)
with a small ΔΦ of 0.05 eV. Experimentally, Ru1Fe1/CoP (0.7 wt % Ru loading) delivered a high Ru utilization
activity of 139.8 A/mgRu and a long-term durability in
acid. Mechanism investigations authenticated that the small ΔΦ
guaranteed the interfacial hydrogen spillover from Ru1Fe1 with efficient hydrogen adsorption to CoP with facile hydrogen
desorption and thereafter boosted the HER activity of Ru.
Hydrogen
spillover-based binary (HSBB) catalysts have attracted
more and more attention in recent years because of their unique reaction
mechanism, different from traditional single-component catalysts.
In this paper, using density functional theory for the screening of
materials, we find 11 candidates with excellent hydrogen evolution
reaction (HER) performance under acidic conditions. Among them, Pt1Ir1-MoS2 has been successfully synthesized
and verified through experiment to have exhibited the outstanding
catalytic performance as predicted. Detailed analysis of these HSBB
catalysts reveals the key role of hydrogen spillover toward efficient
water splitting, paving the way for the discovery of widely applicable
materials and a feedback loop that delivers materials as designed.
Greatly increasing the number of known HSBB catalysts, the current
study not only demonstrates the accuracy of our screening of materials
but also provides a novel paradigm for accelerating the development
of materials and reducing costs.
Manipulating the surface reconstruction of Ni-based catalysts to form the NiOOH intermediates is crucial for electrooxidation. Herein, we reported a phytate coordination-induced enrichment of NiOOH on phytate-coordinated Ni foam, which...
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