Journal
NANOTECHNOLOGY
Volume 31, Issue 42, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1361-6528/ab9fb5
Keywords
electronic modulation; nanoshuttles; hydrogen evolution
Funding
- Zhejiang Provincial Natural Science Foundation of China [LQ18E030010]
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Research on transition metal oxides for hydrogen evolution reaction (HER) is challenging due to their poor electrical conductivity and weak hydrogen adsorption. In this paper, a class of W(18)O(49)nanoshuttles (NSs) with highly bifurcated structure at both ends were synthesized via a hydrothermal method for highly efficient HER. By simply introducing Nb and Pt components, W(18)O(49)can achieve optimal hydrogen adsorption through electronic modulation. The optimized NbPt/W(18)O(49)NSs show an extremely low overpotential of 37 mV to obtain 10 mA cm(-2)and an unprecedented small Tafel slope of 23 mV dec(-1), superior to commercial Pt/C. The NbPt/W(18)O(49)NSs can endure long-term stability for 18 h with negligible morphology change and performance degradation. Based on the surface valence band spectra of x-ray photoelectron spectroscopy and density functional theory calculations, the improved HER activity is closely related to the optimization of hydrogen binding energy on active sites and activation of inert O sites of W18O49. This study opens a facile avenue of electronic modulation to promote electrocatalytic performance.
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