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Title: Atomic H-Induced Mo2C Hybrid as an Active and Stable Bifunctional Electrocatalyst

Journal Article · · ACS Nano
 [1]; ORCiD logo [2];  [3];  [4];  [5];  [6];  [7]; ORCiD logo [8];  [9];  [5]; ORCiD logo [5]
  1. Shanxi Univ. (China); Beijing Univ. of Technology (China); Rice Univ., Houston, TX (United States)
  2. California Inst. of Technology (CalTech), Pasadena, CA (United States)
  3. Rice Univ., Houston, TX (United States). Dept. of Chemistry
  4. Beijing Univ. of Tech. (China). Inst. of Microstructure and Properties of Advanced Materials
  5. Rice Univ., Houston, TX (United States). Dept. of Chemistry and Dept. of Materials Science and NanoEngineering
  6. Shanxi Univ. (China)
  7. Shanxi Univ. (China); Rice Univ., Houston, TX (United States)
  8. California Inst. of Technology (CalTech), Pasadena, CA (United States). Materials and Process Simulation Center
  9. Beijing Univ. of Tech. (China). College of Electronic Information and Control Engineering

Mo2C nanocrystals (NCs) anchored on vertically aligned graphene nanoribbons (VA-GNR) as hybrid nanoelectrocatalysts (Mo2C–GNR) are synthesized through the direct carbonization of metallic Mo with atomic H treatment. The growth mechanism of Mo2C NCs with atomic H treatment is discussed. The Mo2C–GNR hybrid exhibits highly active and durable electrocatalytic performance for the hydrogen-evolution reaction (HER) and oxygen-reduction reaction (ORR). For HER, in an acidic solution the Mo2C–GNR has an onset potential of 39 mV and a Tafel slope of 65 mV dec–1, and in a basic solution Mo2C–GNR has an onset potential of 53 mV, and Tafel slope of 54 mV dec–1. It is stable in both acidic and basic media. Mo2C–GNR is a high-activity ORR catalyst with a high peak current density of 2.01 mA cm2, an onset potential of 0.93 V that is more positive vs reversible hydrogen electrode (RHE), a high electron transfer number n (~3.90), and long-term stability.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE); USDOE Office of Science (SC)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1487283
Journal Information:
ACS Nano, Vol. 11, Issue 1; ISSN 1936-0851
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 124 works
Citation information provided by
Web of Science

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MOF-Derived Bifunctional Cu 3 P Nanoparticles Coated by a N,P-Codoped Carbon Shell for Hydrogen Evolution and Oxygen Reduction journal December 2017
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Nickel nanograins anchored on a carbon framework for an efficient hydrogen evolution electrocatalyst and a flexible electrode journal January 2020
Multifunctional nanostructured electrocatalysts for energy conversion and storage: current status and perspectives journal January 2018
Surface and Interface Engineering: Molybdenum Carbide–Based Nanomaterials for Electrochemical Energy Conversion journal September 2019
The integration of Mo 2 C-embedded nitrogen-doped carbon with Co encapsulated in nitrogen-doped graphene layers derived from metal–organic-frameworks as a multi-functional electrocatalyst journal January 2019
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Porous Molybdenum Carbide Nanostructures Synthesized on Carbon Cloth by CVD for Efficient Hydrogen Production journal November 2019
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