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New Class of Electrocatalysts Based on 2D Transition Metal Dichalcogenides in Ionic Liquid

Journal Article · · Advanced Materials
The optimization of traditional electrocatalysts has reached a point where progress is impeded by fundamental physical factors including inherent scaling relations among thermokinetic characteristics of different elementary reaction steps, non-Nernstian behavior, and electronic structure of the catalyst. This suggests that the currently utilized classes of electrocatalysts may not be adequate for future needs. Our work reports on synthesis and characterization of a new class of materials based on 2D transition metal dichalcogenides including sulfides, selenides, and tellurides of group V and VI transition metals that exhibit excellent catalytic performance for both oxygen reduction and evolution reactions in an aprotic medium with Li salts. The reaction rates are much higher for these materials than previously reported catalysts for these reactions. The reasons for the high activity are found to be the metal edges with adiabatic electron transfer capability and a cocatalyst effect involving an ionic-liquid electrolyte. These new materials are expected to have high activity for other core electrocatalytic reactions and open the way for advances in energy storage and catalysis.
Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
National Science Foundation (NSF); USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Chemical Sciences, Geosciences & Biosciences Division
Grant/Contract Number:
AC02-06CH11357; SC0014664
OSTI ID:
1493708
Alternate ID(s):
OSTI ID: 1484053
Journal Information:
Advanced Materials, Journal Name: Advanced Materials Journal Issue: 4 Vol. 31; ISSN 0935-9648
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (3)

Mass Production of High‐Quality Transition Metal Dichalcogenides Nanosheets via a Molten Salt Method journal June 2019
A Long‐Cycle‐Life Lithium–CO 2 Battery with Carbon Neutrality journal August 2019
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