Deniz Suyu Yapay Yaprakları İçin CO-Toleranslı Platin Ditellürür

Özet (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.

Yazarların özeti; kaynağından alınmıştır. Advanced Energy Materials, 2026 · DOI ↗