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공과대학
화공신소재공학과
Journal papers
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Nanoporous Silver Telluride for Active Hydrogen Evolution
Title
Nanoporous Silver Telluride for Active Hydrogen Evolution
Authors
Kwon H.
;
Bae D.
;
Won D.
;
Kim H.
;
Kim G.
;
Cho J.
;
Park H.J.
;
Baik H.
;
Jeong A.R.
;
Lin C.-H.
;
Chiang C.-Y.
;
Ku C.-S.
;
Yang H.
;
Cho S.
Ewha Authors
조수연
SCOPUS Author ID
조수연
Issue Date
2021
Journal Title
ACS Nano
ISSN
1936-0851
Citation
ACS Nano vol. 15, no. 4, pp. 6540 - 6550
Keywords
catalyst
;
electrochemical synthesis
;
hydrogen evolution reaction
;
nanoporous structure
;
silver telluride (AgTe)
;
X-ray spectroscopy
Publisher
American Chemical Society
Indexed
SCIE; SCOPUS
Document Type
Article
Abstract
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. © 2021 American Chemical Society.
DOI
10.1021/acsnano.0c09517
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