Bioenzyme Inspired Heterointerface Construction of NiFeSe/Ni3S2 for Improved Overall Water Splitting DOI

Xiuling Xu,

Fumin Wang, Liwen Wang

et al.

Inorganic Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: April 3, 2025

Electrocatalytic water splitting for hydrogen production represents a crucial pathway toward establishing sustainable energy infrastructure and addressing environmental concerns, with the development of high-performance nonprecious metal catalysts being central focus. While Ni3S2 demonstrates potential as an electrocatalyst, its limited functionality suboptimal performance necessitate further enhancement. In this study, drawing inspiration from natural hydrogenases, we engineered novel NiFeSe/Ni3S2 composite electrocatalyst through integration NiFeSe Ni3S2. The synthesized catalyst displayed outstanding overall water-splitting in alkaline media, realizing current densities 100 10 mA cm-2 at remarkably low overpotentials 267.4 mV (vs RHE) oxygen evolution reaction (OER) 105.6 (HER), respectively. Remarkably, two-electrode electrolyzer incorporating achieved density 20 substantially reduced cell voltage 1.586 V. Comprehensive analysis revealed that strategic construction biomimetic active centers heterogeneous interfaces significantly modulates electronic structure, improved charge transfer, redistribution electron catalytic sites. This investigation provides valuable insights promising framework rational design bifunctional electrocatalysts applications.

Language: Английский

High-Performance Electrocatalysts for Anion-Exchange Membrane Electrolyzers through Acoustic Cavitation DOI
Arpit Thomas,

A. Narayanan,

Sandhya Pillai

et al.

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: March 10, 2025

Electrochemical water splitting is a promising technology for the sustainable production of green hydrogen. Large-scale hydrogen demands efficient electrocatalysts to continuously operate at large current densities. Catalyst deterioration and its peel-off are major concerns densities, resulting in subpar performance. Herein, we utilized acoustic cavitation-assisted electrodeposition synthesize highly robust NiFe NiMn oxyhydroxide catalysts oxygen evolution reaction (OER) (HER), respectively. The cavitation process led development uniform nanoscale structure, partial amorphization, formation vacancies, likely as result high-strain deformation. synthesized demonstrated excellent performance, with very low overpotentials 285 189 mV 1000 mA/cm2, OER HER cell configuration required 1.76 V only achieving 1 A/cm2 negligible after 24 h continuous operation. commercial viability developed was obtained by testing 2.5 × cm2 anion-exchange membrane (AEM) stack up 1.2 density. potentials reach industry-relevant high densities 500 mA/cm2 were 2.1 2.6 V, electrode stability electrolyzer scale investigated running from 100 total h, wherein durability robustness.

Language: Английский

Citations

0
Bioenzyme Inspired Heterointerface Construction of NiFeSe/Ni3S2 for Improved Overall Water Splitting DOI

Xiuling Xu,

Fumin Wang, Liwen Wang

et al.

Inorganic Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: April 3, 2025

Electrocatalytic water splitting for hydrogen production represents a crucial pathway toward establishing sustainable energy infrastructure and addressing environmental concerns, with the development of high-performance nonprecious metal catalysts being central focus. While Ni3S2 demonstrates potential as an electrocatalyst, its limited functionality suboptimal performance necessitate further enhancement. In this study, drawing inspiration from natural hydrogenases, we engineered novel NiFeSe/Ni3S2 composite electrocatalyst through integration NiFeSe Ni3S2. The synthesized catalyst displayed outstanding overall water-splitting in alkaline media, realizing current densities 100 10 mA cm-2 at remarkably low overpotentials 267.4 mV (vs RHE) oxygen evolution reaction (OER) 105.6 (HER), respectively. Remarkably, two-electrode electrolyzer incorporating achieved density 20 substantially reduced cell voltage 1.586 V. Comprehensive analysis revealed that strategic construction biomimetic active centers heterogeneous interfaces significantly modulates electronic structure, improved charge transfer, redistribution electron catalytic sites. This investigation provides valuable insights promising framework rational design bifunctional electrocatalysts applications.

Language: Английский

Citations

0