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Updated: Jun 9, 2026

Characterizing Electron Transport through Living Biofilms
Published on: June 1, 2018
Resolving Electronic Conflicts in Bifunctional Electrocatalysis via Extracellular Polymeric Substances-Mediated
Yang Yu1, Yefei Su1, Shaojia Gu1
1School of Chemical Science and Technology, Yunnan University, Kunming, China.
Abstract:
This work presents a bio-inspired strategy for spin-state engineering in bifunctional electrocatalysis using extracellular polymeric substances (EPS). The Co2P/Ni2P-EPS2/NF catalyst is designed to resolve the inherent electronic conflicts between the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) by enabling potential-driven charge redistribution and dynamic spin-state reconstruction. The catalyst achieves low overpotentials of 49.1 mV for HER and 198.5 mV for OER at 10 mA cm-2, demonstrating exceptional bifunctional electrocatalytic activity and stability. Furthermore, the catalyst operates efficiently under solar irradiation, achieving a cell voltage of only 1.45 V for overall water splitting, showcasing its potential for sustainable hydrogen production driven by renewable energy. The combination of experimental data and theoretical insights reveals that high-spin Co3+ for OER and low-spin Ni2+ for HER optimally modulate the adsorption of reaction intermediates. This work introduces a novel approach to electrocatalysis and offers a scalable and economically feasible solution for solar-driven hydrogen production from water.
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