Related Experiment Videos
MBenes: emerging 2D materials as efficient electrocatalysts for the nitrogen reduction reaction
Xiaowei Yang1, Chanjuan Shang, Si Zhou
1Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Dalian University of Technology), Ministry of Education, Dalian 116024, China. sizhou@dlut.edu.cn.
Nanoscale Horizons
|May 21, 2020
Summary
Two-dimensional transition metal borides (MBenes) show promise as non-precious catalysts for nitrogen reduction reaction (NRR). Boron sites on MBenes exhibit superior activity for NRR electrocatalysis, offering tunable performance for nitrogen fixation.
Area of Science:
- Materials Science
- Electrochemistry
- Catalysis
Background:
- Two-dimensional transition metal borides (MBenes) are a novel class of materials with layered structures.
- MBenes exhibit excellent electrical conductivity and stability, making them suitable for catalytic applications.
Purpose of the Study:
- To investigate the potential of ten different MBenes for the electrocatalysis of the nitrogen reduction reaction (NRR).
- To understand the fundamental principles governing the catalytic activity of MBenes for NRR.
Main Methods:
- Comprehensive first-principles calculations were employed.
- The stability of MBenes in aqueous environments was assessed.
- The selectivity of MBenes for NRR over the hydrogen evolution reaction (HER) was evaluated.
Main Results:
- MBenes demonstrate high stability and excellent selectivity for NRR.
- Both surface boron and metal atoms act as active sites, with boron sites showing superior activity.
- The catalytic activity can be tuned by engineering the work function of the MBenes.
Conclusions:
- MBenes represent a new class of non-precious catalysts for nitrogen fixation.
- Understanding the electronic structure and surface properties is key to optimizing MBenes for NRR catalysis.