PtM/MxBy (M=Ni,Co, Fe) Heterostructured Nanobundles as Advanced Electrocatalyst for Hydrogen Evolution Reaction |
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| Authors: | Mengyu Yuan Hui Xu Cheng Wang Prof Yong Wang Yuan Wang Prof Xiaomei Wang Prof Yukou Du |
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| Institution: | 1. College of Chemistry Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123 P. R. China;2. School of Chemical Biology and Materials Engineering, Suzhou University Science and Technology, Suzhou, 215009 P. R. China |
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| Abstract: | Optimizing the electronic and synergistic effect of hybrid electrocatalysts based on Pt and Pt-based nanocatalysts is of tremendous importance towards a superior hydrogen evolution performance under both acidic and alkaline conditions. However, developing an ideal Pt-based hydrogen evolution reaction (HER) electrocatalyst with moderated electronic structure as well as strong synergistic effect is still a challenge. Herein, we fabricated boron (B)-doped PtNi nanobundles by a two-step method using NaBH4 as the boron source to obtain PtNi/Ni4B3 heterostructures with well-defined nanointerfaces between PtNi and Ni4B3, achieving an enhanced catalytic HER performance. Especially, the PtNi/Ni4B3 nanobundles (PtNi/Ni4B3 NBs) can deliver a current density of 10 mA cm?2 at the overpotential of 14.6 and 26.5 mV under alkaline and acidic media, respectively, as well as outstanding electrochemical stability over 40 h at the current density of 10 mA cm?2. Remarkably, this approach is also universal for the syntheses of PtCo/Co3B and PtFe/Fe49B with outstanding electrocatalytic HER performance. |
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| Keywords: | electrocatalysis heterostructures hydrogen evolution reaction modulated electronic structure nanobundles |
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