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Title: Origami inspired Three-Dimensional Interconnected Molybdenum Carbide Nanoflakes

Journal Article · · Advanced Materials Interfaces
ORCiD logo [1];  [2];  [3];  [4];  [3];  [2];  [4];  [2];  [3];  [2];  [2]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Rice Univ., Houston, TX (United States). Dept. of materials Science and NanoEngineering
  3. Indian Inst. of Science, Bangalore (India). Materials Research Center
  4. Federal Univ. of Minas Gerais, Belo Horizonte, Minas Gerais (Brazil). Dept. de Química

High-temperature stable transition metal carbides are one of the promising classes of materials for next-generation energy applications such as water splitting catalysis and electrodes for energy storage devices. Herein, origami-like molybdenum carbide flakes with interfacially connected structures in various orientations using an easily scalable chemical vapor deposition method are synthesized. Interestingly, each individual flake of similar orientation is interconnected across different planes. The interconnected architectures are found to be highly elastic and behave in a sponge-like manner. In addition, the surface energy of each plane is calculated using the first-principle density functional theory. The molybdenum carbide shows excellent activity for the hydrogen evolution reaction, with the onset over potential occurring around -16 to -25 mV with high stability. The material is used as an electrode for supercapacitors as a second demonstration. The supercapacitor constructed with polypyrrole reaches the specific capacitance of ≈279 F g-1 at a current density of 0.5 A g-1.

Research Organization:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
US Air Force Office of Scientific Research (AFOSR); USDOD; USDOE
Grant/Contract Number:
AC52-06NA25396
OSTI ID:
1469542
Report Number(s):
LA-UR-17-27486
Journal Information:
Advanced Materials Interfaces, Vol. 5, Issue 6; ISSN 2196-7350
Publisher:
Wiley-VCHCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 10 works
Citation information provided by
Web of Science

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