Title: Combining pressure and electrochemistry to synthesize superhydrides

Journal Article · · Proceedings of the National Academy of Sciences of the United States of America
 [1]; ORCiD logo [2]; ORCiD logo [3]
  1. Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213,
  2. Department of Physics, University of Illinois Chicago, Chicago, IL 60607,, Department of Chemistry, University of Illinois Chicago, Chicago, IL 60607,
  3. Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213,, Department of Physics, Carnegie Mellon University, Pittsburgh, PA 15213

Significance Superhydrides are a materials system where near–room-temperature superconductivity has been achieved but only at very high (megabar) pressures. This work proposes an approach that combines pressure and electrochemistry to stabilize superhydrides at moderate pressures. Through a computational study of the palladium–hydrogen system, we construct electrochemical phase diagrams and show that electrochemically synthesizing superhydrides may be possible when combined with moderate pressures. We generalize this to other binary metal superhydrides of interest for superconductivity, including La, Y, and Mg hydrides.

Research Organization:
Univ. of Illinois, Chicago, IL (United States)
Sponsoring Organization:
National Science Foundation (NSF); USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
NA0003975
OSTI ID:
1829529
Journal Information:
Proceedings of the National Academy of Sciences of the United States of America, Journal Name: Proceedings of the National Academy of Sciences of the United States of America Journal Issue: 46 Vol. 118; ISSN 0027-8424
Publisher:
Proceedings of the National Academy of SciencesCopyright Statement
Country of Publication:
United States
Language:
English

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