Advanced Energy Materials· 2026Q1
CO‐Tolerant Ethylene Glycol Oxidation on p–d Hybridized Platinum Ditelluride for Seawater Artificial Leaves
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- 2026year
Short summary
A novel pH-gradient photoelectrochemical–electrochemical (PEC–EC) system uses CO-tolerant 1T-PtTe2 to enable bias-free hydrogen and glycolate production from seawater, achieving 96.4% Faradaic efficiency for glycolate at 0.9 V vs. RHE.
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Key points
- Developed a pH-gradient PEC–EC system for artificial leaves operating in fresh water and natural seawater.
- Utilized 1T-PtTe2 as a CO-tolerant electrocatalyst for ethylene glycol oxidation, achieving 96.4% Faradaic efficiency for glycolate.
- Demonstrated bias-free current densities of 37.85 mA cm⁻² (fresh water) and 37.18 mA cm⁻² (seawater).
- Maintained continuous hydrogen and glycolate production for 120 hours.
- Electronic structure analysis revealed tellurium incorporation weakens CO intermediate adsorption on platinum.
AI-generated from the title and abstract; the full text is not read.
Abstract
ABSTRACT Seawater‐based artificial leaves are fundamentally constrained by anodic surface poisoning and insufficient photovoltage for bias‐free reaction under complex electrolytes. Here we report a pH‐gradient photoelectrochemical–electrochemical (PEC–EC) system that couples photoelectrochemical hydrogen evolution reaction (HER) and electrochemical ethylene glycol oxidation reaction (EGOR) enabled by CO‐tolerant 1T‐PtTe 2 in both fresh water and natural seawater. As an anodic electrocatalyst for EGOR, platinum ditelluride exhibits a low onset potential of 0.42 V vs. RHE, achieves highly selective production of the value‐added product glycolate (GA) with a Faradaic efficiency of 96.4% at 0.9 V vs. RHE, and maintains high stability in natural seawater. Electronic structure analysis reveals that tellurium incorporation induces a downshift of the platinum d band center, weakening the adsorption of CO‐derived intermediates and suppressing surface poisoning without compromising reactant activation. Our PEC–EC device delivers bias‐free current densities of 37.85 mA cm −2 in fresh water and 37.18 mA cm −2 in natural seawater and sustains continuous hydrogen and glycolate production for 120 h. The demonstration of this PEC–EC system provides a general framework for designing bias‐free photoelectrochemical devices operating at appreciable current densities and advances the practical implementation of seawater‐based artificial leaves.
The authors' abstract, as published at the source. Advanced Energy Materials, 2026 · DOI ↗
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Field: Renewable Energy, Sustainability and the Environment
Renewable Energy, Sustainability and the EnvironmentEnergy