Abundant vanadium diboride with graphene-like boron layers for hydrogen evolution

Palani R. Jothi, Y. Zhang, K. Yubuta, D. B. Culver, M. Conley, B. P.T. Fokwa

研究成果: Contribution to journalArticle査読

15 被引用数 (Scopus)

抄録

We report on the design of abundant and highly active VB2 for hydrogen production. Density functional theory (DFT) calculations have predicted very high HER activity of the graphene-like B-layer, the V-terminated {100} layer, and the mixed V/B-terminated {101} layer of VB2. Bulk samples and nanoparticles of VB2 were synthesized and tested for their HER performance. The results indicate that both bulk and nano-VB2 are active for HER, consistent with theoretical predictions. In addition, the HER activity of VB2 is significantly increased at the nanoscale if compared to the bulk, reaching an overpotential of 192 mV at 10 mA/cm2 current density. Increased surface area and higher density of active sites are responsible for the higher nanoscale activity, making nano-VB2 the best HER boride to date in terms of abundance, stability, and activity in acidic solution.

本文言語英語
ページ(範囲)176-181
ページ数6
ジャーナルACS Applied Energy Materials
2
1
DOI
出版ステータス出版済み - 1 28 2019
外部発表はい

All Science Journal Classification (ASJC) codes

  • Chemical Engineering (miscellaneous)
  • Energy Engineering and Power Technology
  • Electrochemistry
  • Materials Chemistry
  • Electrical and Electronic Engineering

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