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- W4200263710 abstract "Development of highly active and stable non-noble electrocatalysts with well-defined nanostructures is crucial for efficient hydrogen evolution reaction (HER). Herein, a novel three-dimensional (3D) self-supported electrode consists of vanadium nitride (VN) nanodots and Co nanoparticles co-embedded and highly active single Co atoms anchored in N-doped carbon nanotubes supported on carbon cloth ([email protected]/CC) is fabricated via a one-step in situ nanoconfined pyrolysis strategy, which shows remarkable enhanced HER electrocatalytic activity in acidic medium. During pyrolysis, the formed VN nanodots induce the generation of atomic CoNx sites in NCNTs, contributing to superior electrocatalytic activity. Experimental and density functional theory (DFT) calculation results reveal that the electrode has multiple accessible active sites, fast reaction kinetics, low charge/mass transfer resistances, high conductivity, as well as downshifted d-band center with a thermodynamically favorable hydrogen adsorption free energy (ΔGH*), all of which greatly boost the HER performance. As a result, the [email protected]/CC electrode displays superb catalytic performance toward HER with a low overpotential of 29 mV at 10 mA cm−2 in acidic medium, which could maintain for at least 60 h of stable performance. This work opens a facile avenue to explore low-cost, high performance, but inexpensive metals/nitrogen-doped carbon composite electrocatalysts for HER." @default.
- W4200263710 created "2021-12-31" @default.
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- W4200263710 date "2022-05-01" @default.
- W4200263710 modified "2023-10-16" @default.
- W4200263710 title "Ultrafine VN nanodots induced generation of abundant cobalt single-atom active sites on nitrogen-doped carbon nanotube for efficient hydrogen evolution" @default.
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- W4200263710 doi "https://doi.org/10.1016/j.jechem.2021.11.035" @default.
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