4 years ago

Direct Synthesis of Large-Area 2D Mo2C on In Situ Grown Graphene

Direct Synthesis of Large-Area 2D Mo2C on In Situ Grown Graphene
Zhongxin Chen, Xiaoxu Zhao, Wei Liu, Wu Zhou, Kian Ping Loh, Jianyi Chen, Dechao Geng, Wei Fu, Weiwei Sun
As a new member of the MXene group, 2D Mo2C has attracted considerable interest due to its potential application as electrodes for energy storage and catalysis. The large-area synthesis of Mo2C film is needed for such applications. Here, the one-step direct synthesis of 2D Mo2C-on-graphene film by molten copper-catalyzed chemical vapor deposition (CVD) is reported. High-quality and uniform Mo2C film in the centimeter range can be grown on graphene using a Mo–Cu alloy catalyst. Within the vertical heterostructure, graphene acts as a diffusion barrier to the phase-segregated Mo and allows nanometer-thin Mo2C to be grown. Graphene-templated growth of Mo2C produces well-faceted, large-sized single crystals with low defect density, as confirmed by scanning transmission electron microscopy (STEM) measurements. Due to its more efficient graphene-mediated charge-transfer kinetics, the as-grown Mo2C-on-graphene heterostructure shows a much lower onset voltage for hydrogen evolution reactions as compared to Mo2C-only electrodes. The one-step direct synthesis of a 2D Mo2C-on-graphene heterostructure by molten Cu-catalyzed chemical vapor deposition is reported. Graphene acts as a diffusion barrier to phase-segregated Mo, thus allowing the thickness of Mo2C to be kinetically controlled. The heterostructure functions as a highly stable electrode in hydrogen evolution reactions.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/adma.201700072

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.