Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 59, Issue 10, Pages 3961-3965Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201915663
Keywords
active sites; boron; electrocatalysis; electronic structure; intermetallic compounds
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Funding
- National Natural Science Foundation of China (NSFC) [21771079, 21922507]
- Program for JLU Science and Technology Innovative Research Team (JLUSTIRT)
- Fok Ying Tung Education Foundation [161011]
- NSFC [51925202, 21771013, 21901083, 21621001]
- Postdoctoral Innovative Talent Support Program [BX20180120]
- China Postdoctoral Science Foundation [2018M641771]
- 111 Project [B17020]
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A theoretical and experimental study gives insights into the nature of the metal-boron electronic interaction in boron-bearing intermetallics and its effects on surface hydrogen adsorption and hydrogen-evolving catalytic activity. Strong hybridization between the d orbitals of transition metal (T-M) and the sp orbitals of boron exists in a family of fifteen T-M-boron intermatallics (T-M:B=1:1), and hydrogen atoms adsorb more weakly to the metal-terminated intermetallic surfaces than to the corresponding pure metal surfaces. This modulation of electronic structure makes several intermetallics (e.g., PdB, RuB, ReB) prospective, efficient hydrogen-evolving materials with catalytic activity close to Pt. A general reaction pathway towards the synthesis of such TMB intermetallics is provided; a class of seven phase-pure TMB intermetallics, containing V, Nb, Ta, Cr, Mo, W, and Ru, are thus synthesized. RuB is a high-performing, non-platinum electrocatalyst for the hydrogen evolution reaction.
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