High-valence molybdenum-induced boundary-rich heterostructures for enhanced oxygen evolution reaction DOI Open Access
Lu Li, Jinhu Wu,

Limeng Sun

et al.

Energy Materials, Journal Year: 2025, Volume and Issue: 5(8)

Published: April 30, 2025

The green synthesis of hydrogen through electrochemical water splitting has been severely limited by the slow kinetics anodic oxygen evolution reaction (OER). However, current benchmark electrocatalysts are still based on precious metals. Therefore, developing low-cost and highly efficient OER is great importance. Here, we design nanoscale multicomponent metal flakes with a crystalline/amorphous structure (ac-FeCoNiMo) via simple sol-gel strategy to enhance performance. By engineering high-valence Mo doping strategy, successfully develop ac-FeCoNiMo unique architecture featuring boundary-rich regions, modulated Fe/Co species, defects, enlarged metal-O bonds. As result, optimized exhibits excellent performance, achieving low overpotentials 222 mV 253 reach densities 20 mA cm-2 100 cm-2, respectively, along outstanding stability. Mechanistic investigations reveal that follows Lattice Oxygen Mediated mechanism during process. This behavior likely due induced weakening metal-oxygen bonds, resulting from expanded M-O-M (M = metal) units formation abundant regions. study paves way for development multi-element electrocatalysts.

Language: Английский

High-valence molybdenum-induced boundary-rich heterostructures for enhanced oxygen evolution reaction DOI Open Access
Lu Li, Jinhu Wu,

Limeng Sun

et al.

Energy Materials, Journal Year: 2025, Volume and Issue: 5(8)

Published: April 30, 2025

The green synthesis of hydrogen through electrochemical water splitting has been severely limited by the slow kinetics anodic oxygen evolution reaction (OER). However, current benchmark electrocatalysts are still based on precious metals. Therefore, developing low-cost and highly efficient OER is great importance. Here, we design nanoscale multicomponent metal flakes with a crystalline/amorphous structure (ac-FeCoNiMo) via simple sol-gel strategy to enhance performance. By engineering high-valence Mo doping strategy, successfully develop ac-FeCoNiMo unique architecture featuring boundary-rich regions, modulated Fe/Co species, defects, enlarged metal-O bonds. As result, optimized exhibits excellent performance, achieving low overpotentials 222 mV 253 reach densities 20 mA cm-2 100 cm-2, respectively, along outstanding stability. Mechanistic investigations reveal that follows Lattice Oxygen Mediated mechanism during process. This behavior likely due induced weakening metal-oxygen bonds, resulting from expanded M-O-M (M = metal) units formation abundant regions. study paves way for development multi-element electrocatalysts.

Language: Английский

Citations

0