Abstract Scope |
The electrolysis of water is considered as a clean mean for large scale hydrogen gas production. [1] However, this large-scale production is still hindered by the high cost and scarcity of noble metal catalysts such as Pt. Recently, non-noble metal materials have emerged as highly active electrocatalysts for the hydrogen evolution reaction (HER) to produce hydrogen. Our recent experimental and computational works show that AlB2-type bulk and nanoscale binary borides exhibit high HER activity. [2-6] We have also recently found an unexpected lattice parameter-dependency on HER of ternary variants crystallizing with the AlB2-type structure that enabled Cr0.4Mo0.6B2 to overpower Pt/C at high current density. [7] Furthermore, an unexpected boron-chain dependency of the HER activity was discovered in the V-B system, [8] that even allows for the prediction of unknow active HER catalysts.
References
(1) Seh et al., Science, 355, eaad4998, (2017).
(2) H. Park, et al., Angew. Chem. Int. Ed. 56, 5575 (2017).
(3) H. Park, et al., J. Amer. Chem. Soc. 139, 12915 (2017).
(4) H. Li et al., Adv. Energy Mater. 7, 1700513 (2017).
(5) P. R. Jothi, et al., Adv. Mater. 30, 1704181 (2018).
(6) P. R. Jothi, et al., ACS Appl. Energy Mater. 30, 1704181 (2018).
(7) H. Park, et al., Adv. Mater. 32, 2000855 (2020).
(8) E. Lee, et al., Angew. Chem. Int. Ed. 59, 11774 (2020). |