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Title: Three-Dimensional Printed MoS 2 /Graphene Aerogel Electrodes for Hydrogen Evolution Reactions

Journal Article · · ACS Materials Au

In this work, we demonstrate the use of direct ink writing (DIW) technology to create 3D catalytic electrodes for electrochemical applications. Hybrid MoS2/graphene aerogels are made by mixing commercially available MoS2 and graphene oxide powders into a thixotropic, high concentration, viscous ink. A porous 3D structure of 2D graphene sheets and MoS2 particles was created after post treatment by freeze-drying and reducing graphene oxide through annealing. The composition and morphology of the samples were fully characterized through XPS, BET, and SEM/EDS. The resulting 3D printed MoS2/graphene aerogel electrodes had a remarkable electrochemically active surface area (>1700 cm2) and were able to achieve currents over 100 mA in acidic media. Notably, the catalytic activity of the MoS2/graphene aerogel electrodes was maintained with minimal loss in surface area compared to the non-3D printed electrodes, suggesting that DIW can be a viable method of producing durable electrodes with a high surface area for water splitting. Furthermore, this demonstrates that 3D printing a MoS2/graphene 3D porous network directly using our approach not only improves electrolyte dispersion and facilitates catalyst utilization but also provides multidimensional electron transport channels for improving electronic conductivity.

Research Organization:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1866499
Alternate ID(s):
OSTI ID: 1876963
Report Number(s):
LLNL-JRNL-831622
Journal Information:
ACS Materials Au, Journal Name: ACS Materials Au Vol. 2 Journal Issue: 5; ISSN 2694-2461
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

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  • Worsley, Marcus A.; Pauzauskie, Peter J.; Olson, Tammy Y.
  • Journal of the American Chemical Society, Vol. 132, Issue 40, p. 14067-14069 https://doi.org/10.1021/ja1072299
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