Goto Taiga, Ito Shin-Ichi, Shinde Satish Laxman, Ishibiki Ryota, Hikita Yasuyuki, Matsuda Iwao, Hamada Ikutaro, Hosono Hideo, Kondo Takahiro
Graduate School of Pure and Applied Sciences, University of Tsukuba, 1-1-1, Tennodai, Tsukuba, 305-8573, Japan.
Materials Research Center for Element Strategy, Tokyo Institute of Technology, Yokohama, 226-8503, Japan.
Commun Chem. 2022 Oct 4;5(1):118. doi: 10.1038/s42004-022-00739-8.
Hydrogen boride (HB) sheets are metal-free two-dimensional materials comprising boron and hydrogen in a 1:1 stoichiometric ratio. In spite of the several advancements, the fundamental interactions between HB sheets and discrete molecules remain unclear. Here, we report the adsorption of CO and its conversion to CH and CH using hydrogen-deficient HB sheets. Although fresh HB sheets did not adsorb CO, hydrogen-deficient HB sheets reproducibly physisorbed CO at 297 K. The adsorption followed the Langmuir model with a saturation coverage of 2.4 × 10 mol g and a heat of adsorption of approximately 20 kJ mol, which was supported by density functional theory calculations. When heated in a CO atmosphere, hydrogen-deficient HB began reacting with CO at 423 K. The detection of CH and CH as CO reaction products in a moist atmosphere indicated that hydrogen-deficient HB promotes C-C coupling and CO conversion reactions. Our findings highlight the application potential of HB sheets as catalysts for CO conversion.
硼氢化氢（HB）片材是一种无金属的二维材料，由硼和氢按化学计量比1:1组成。尽管取得了一些进展，但HB片材与离散分子之间的基本相互作用仍不清楚。在此，我们报道了使用缺氢HB片材吸附CO并将其转化为CH和CH的过程。尽管新鲜的HB片材不吸附CO，但缺氢HB片材在297 K时可重复地物理吸附CO。吸附遵循朗缪尔模型，饱和覆盖率为2.4×10 mol g，吸附热约为20 kJ mol，这得到了密度泛函理论计算的支持。在CO气氛中加热时，缺氢HB在423 K时开始与CO反应。在潮湿气氛中检测到CH和CH作为CO反应产物，表明缺氢HB促进了C-C偶联和CO转化反应。我们的研究结果突出了HB片材作为CO转化催化剂的应用潜力。
