몰리브덴 인화물 단결정 합성법 개발 및 산소환원반응 촉매로의 응용에 대한 연구

Abstract

Hydrogen peroxide (H2O2) is widely used in disinfection, water purification, and chemical processing, but its conventional production via the anthraquinone process is energy-intensive and environmentally burdensome. Electrochemical H2O2 synthesis via the two-electron oxygen reduction reaction (2e- ORR) offers a cleaner alternative, yet highly selective and efficient catalysts remain scarce. Molybdenum phosphide (MoP) is a promising candidate due to its electrical conductivity and stability, but traditional synthesis methods yield polycrystalline or amorphous forms with limited facet control. In this study, we developed a liquid-metal-assisted chemical vapor deposition (CVD) strategy using gallium to grow MoP single crystals with controllable facet exposure. By tuning the growth temperature, we selectively obtained oriented nanoplates and oriented pillars. Morphological analyses confirmed high crystallinity and facet definition. Electrochemical tests showed that the facet exhibited superior H2O2 selectivity, attributed to differences in reaction pathways. This work demonstrates a practical synthesis method for facet-controlled MoP crystals, overcoming previous limitations and enabling rational design of MoP electrocatalysts for efficient 2e⁻ ORR-based H2O2 production.