Results for “Lu(FeB)2” | Engineering Papers

DOE OSTI2020

Materials Data on Lu(FeB)2 by Materials Project

Lu(FeB)2 crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Lu is bonded in a 8-coordinate geometry to eight equivalent Fe and eight equivalent B atoms. All Lu–Fe bond lengths are 2.89 Å. All Lu–B bond lengths are 2.66 Å. Fe is bonded to four equivalent Lu and four equivalent B atoms to form a mixture of distorted face, edge, and corner-sharing FeLu4B4 tetrahedra. All Fe–B bond lengths are 2.16 Å. B is bonded in a 9-coordinate geometry to four equivalent Lu, four equivalent Fe, and one B atom. The B–B bond length is 2.05 Å.

36 MATERIALS SCIENCE↗

DOE OSTI2026

Computational discovery of a tetragonal MBene phase: diamond-shaped boron lattices, viable MAB precursors, and selective CO 2 reduction

MBenes are a class of two-dimensional transition-metal borides derived from layered MAB phases. Here, we use first-principles calculations to predict a new tetragonal MB (1 : 1) MBene phase featuring a diamond-shaped B–B lattice and systematically assess its phase stability, synthetic accessibility, and catalytic performance towards the CO 2 reduction reaction (CO 2 RR). Four tetragonal configurations are benchmarked against known hexagonal and orthorhombic phases, and a multi-tier screening identifies six robust members (CrB, FeB, MoB, WB, IrB, and PtB). Exploration of the I4/mmm MAB space reveals 11 viable precursors, including the experimentally synthesized Ir 2 ZnB 2 , which validates our screening approach. CO 2 RR free-energy diagrams show that CrB favors CH 3 OH while FeB, MoB, WB, IrB, and PtB preferentially yield HCOOH. The corresponding limiting potentials are competitive with, and in some cases superior to, those reported for state-of-the-art orthorhombic and hexagonal MBenes. These findings expand the MBene landscape by establishing a tetragonal phase with structural, synthetic, and catalytic promise.

Lu, Linguo [University of Puerto Rico, San Juan, P↗