Nanoporous Silver Telluride for Active Hydrogen Evolution

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Silver-based nanomaterials have been versatile building blocks of various photoassisted energy applications; however, they have demonstrated poor electrochemical catalytic performance and stability, in particular, in acidic environments. Here we report a stable and high-performance electrochemical catalyst of silver telluride (AgTe) for the hydrogen evolution reaction (HER), which was synthesized with a nanoporous structure by an electrochemical synthesis method. X-ray spectroscopy techniques on the nanometer scale and high-resolution transmission electron microscopy revealed an orthorhombic structure of nanoporous AgTe with precise lattice constants. First-principles calculations show that the AgTe surface possesses highly active catalytic sites for the HER with an optimized Gibbs free energy change of hydrogen adsorption (-0.005 eV). Our nanoporous AgTe demonstrates exceptional stability and performance for the HER, an overpotential of 27 mV, and a Tafel slope of 33 mV/dec. As a stable catalyst for hydrogen production, AgTe is comparable to platinum-based catalysts and provides a breakthrough for high-performance electrochemical catalysts.
Publisher
AMER CHEMICAL SOC
Issue Date
2021-04
Language
English
Article Type
Article
Citation

ACS NANO, v.15, no.4, pp.6540 - 6550

ISSN
1936-0851
DOI
10.1021/acsnano.0c09517
URI
http://hdl.handle.net/10203/285303
Appears in Collection
PH-Journal Papers(저널논문)
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