乙二醇
光电流
化学
乙烯
甲酸
电解质
催化作用
无机化学
化学工程
光化学
材料科学
有机化学
电极
光电子学
工程类
物理化学
作者
Jun‐Yuan Cui,Tiantian Li,Long Chen,Jianjun Wang
出处
期刊:Molecules
[Multidisciplinary Digital Publishing Institute]
日期:2024-06-11
卷期号:29 (12): 2783-2783
被引量:2
标识
DOI:10.3390/molecules29122783
摘要
The photoelectrochemical (PEC) conversion of organic small molecules offers a dual benefit of synthesizing value-added chemicals and concurrently producing hydrogen (H2). Ethylene glycol, with its dual hydroxyl groups, stands out as a versatile organic substrate capable of yielding various C1 and C2 chemicals. In this study, we demonstrate that pH modulation markedly enhances the photocurrent of BiVO4 photoanodes, thus facilitating the efficient oxidation of ethylene glycol while simultaneously generating H2. Our findings reveal that in a pH = 1 ethylene glycol solution, the photocurrent density at 1.23 V vs. RHE can attain an impressive 7.1 mA cm−2, significantly surpassing the outputs in neutral and highly alkaline environments. The increase in photocurrent is attributed to the augmented adsorption of ethylene glycol on BiVO4 under acidic conditions, which in turn elevates the activity of the oxidation reaction, culminating in the maximal production of formic acid. This investigation sheds light on the pivotal role of electrolyte pH in the PEC oxidation process and underscores the potential of the PEC strategy for biomass valorization into value-added products alongside H2 fuel generation.
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