2023
DOI: 10.26599/jac.2023.9220729
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Deintercalation of Al from MoAlB by molten salt etching to achieve a Mo 2AlB 2 compound and 2D MoB nanosheets

Abstract: Two-dimensional (2D) MoB MBene has attracted much attention due to its fascinating properties and functional applications. So far work on synthesis of 2D MoB nanosheets through acid or alkaline etching of MoAlB has not been very successful. It has been proposed that 2D MoB MBene may be fabricated by chemical etching of a Mo2AlB2 precursor, but further investigations were not performed possibly due to the difficult preparation of the metastable Mo2AlB2 compound at high temperatures by solid state reactions. Her… Show more

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Cited by 27 publications
(3 citation statements)
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“…This reaction provides a streamlined synthesis of bulk metastable Mo 2 AlB 2 as well as an interesting case study in the different reactivities between MAX and MAB phases. Analogous studies provide complementary results to our findings. , …”
Section: Targeting Metastable Compoundssupporting
confidence: 87%
“…This reaction provides a streamlined synthesis of bulk metastable Mo 2 AlB 2 as well as an interesting case study in the different reactivities between MAX and MAB phases. Analogous studies provide complementary results to our findings. , …”
Section: Targeting Metastable Compoundssupporting
confidence: 87%
“…2h, the Al 2p spectrum of MBene-620 was fitted with two peaks at 74.2 and 76.7 eV, assigned to MBenes and Al 2 O 3 respectively. 45,46 Comparing Fig. 2e and h, the Al-metal peak disappeared, indicating that most of the Al layer was etched from MoAlB to obtain the MBene.…”
Section: Resultsmentioning
confidence: 94%
“…In recent years, there has been a growing interest in the ternary laminate transitional metal borides (MAB phases), which are analogous to MAX phases, due to their potential for selective etching into 2D counterparts known as MBenes. Among these, 2D orthorhombic transition-metal borides ( ort -MBenes) have emerged as promising candidates for applications in Li-ion batteries (LIB) electrodes and electrocatalysis materials since 2017, leading to a growing emphasis on the experimental and theoretical investigation of MBenes in energy storage, magnetic devices, and catalysts. However, the selective etching of A layers from orthorhombic MAB ( ort -MAB) phases poses challenges. Currently, only two ort -MAB phases, MoAlB and Cr 2 AlB 2 , have been investigated as precursors for the synthesis of ort -MBenes (MoB and CrB). , In 2019, our research group successfully predicted and synthesized the first hexagonal ternary laminate MAB ( h -MAB) phase, Ti 2 InB 2 .…”
Section: Introductionmentioning
confidence: 99%