MXenes公司
最大相位
材料科学
电催化剂
密度泛函理论
纳米材料
过渡金属
纳米技术
化学物理
化学
计算化学
物理化学
催化作用
碳化物
电化学
电极
生物化学
复合材料
作者
Brian C. Wyatt,Anupma Thakur,Kat Nykiel,Zachary D. Hood,Sushovit Adhikari,Krista K. Pulley,Wyatt J. Highland,Alejandro Strachan,Babak Anasori
出处
期刊:Nano Letters
[American Chemical Society]
日期:2023-01-26
卷期号:23 (3): 931-938
被引量:6
标识
DOI:10.1021/acs.nanolett.2c04287
摘要
The need for novel materials for energy storage and generation calls for chemical control at the atomic scale in nanomaterials. Ordered double-transition-metal MXenes expanded the chemical diversity of the family of atomically layered 2D materials since their discovery in 2015. However, atomistic tunability of ordered MXenes to achieve ideal composition-property relationships has not been yet possible. In this study, we demonstrate the synthesis of Mo2+αNb2-αAlC3 MAX phases (0 ≤ α ≤ 0.3) and confirm the preferential ordering behavior of Mo and Nb in the outer and inner M layers, respectively, using density functional theory, Rietveld refinement, and electron microscopy methods. We also synthesize their 2D derivative Mo2+αNb2-αC3Tx MXenes and exemplify the effect of preferential ordering on their hydrogen evolution reaction electrocatalytic behavior. This study seeks to inspire further exploration of the ordered double-transition-metal MXene family and contribute composition-behavior tools toward application-driven design of 2D materials.
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