MBenes: progress, challenges and future

Abstract

The prevalence of MXenes, two-dimensional (2D) transition metal carbides/nitrides separated from layered MAX phases, has spawned much interest in exploring 2D transition metal borides during the past decade. In 2017,...

Deintercalation of Al from MoAlB by molten salt etching to achieve a Mo 2AlB 2 compound and 2D MoB nanosheets

“…According to the crystal structure of 2D MBenes, they are grouped into orthorhombic MBenes and hexagonal MBenes prepared from orthorhombic MAB and hexagonal MAX (X is Boron) precursors, respectively, with different synthesis methods [21]. It should be noted that these 2D MBenes can be terminated with or without surface functional groups.…”

S-functionalized 2D V2B as a promising anode material for rechargeable lithium ion batteries

“…Two-dimensional (2D) transition metal borides (MBenes), analogous to MXenes with larger specific areas and adjustable chemical properties, have attracted more and more attention fro both theoretical and experimental researchers in the fields of energy storage and electrocatalysis. [9][10][11][12] MB (or M 2 B 2 ) type MBenes is a commonly investigated one. For example, Guo et al found that Mo 2 B 2 MBene was a potential candidate for LIBs owning to the small diffusion barrier and high storage capacity of B444 mA h g À1 for Li atoms.…”

New horizons of MBenes: highly active catalysts for the CO oxidation reaction

“…The 18 orth/hex-M 2 B 2 compounds studied in this work have been proved to be stable dynamically according to the previous research studies. [31][32][33]37,[51][52][53][54][55] Experimentally, oxygen functional groups have been detected on the surface of hex-Mo 4/3 B 2 MBenes. 56 Meanwhile, theoretical studies of O-functionalized MBenes have been carried out in many studies.…”

“…In 2017, MBenes, a family of two-dimensional transition metal borides, were reported, 31 and they possess similar structures to MXenes. 32 MBenes are widely studied as catalysts or substrates of various reactions, including the hydrogen evolution reaction (HER), 31,[33][34][35][36] the oxygen evolution reaction (OER)/oxygen reduction reaction (ORR), 34,37 the nitrogen reduction reaction (NRR) [38][39][40] and the CO 2 reduction reaction (CO 2 RR). 41,42 Similar to the situation for MXenes, the exposed transition metal surfaces of pristine MBenes can be easily functionalized by O atoms.…”