Multimetallic Prussian Blue Analogue Nanoparticles for Oxygen Evolution Reaction and Efficient Benzyl Alcohol Oxidation

IF 5.3 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY ACS Applied Nano Materials Pub Date : 2024-07-02 DOI:10.1021/acsanm.4c02915

Baghendra Singh*, Rakesh Kumar and Apparao Draksharapu*,

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Abstract

Electrocatalytic alcohol assisted water splitting has attained immense interest to improve the energy efficiency of water splitting. A series of metal–organic frameworks (MOFs) have been employed to replace the anodic oxygen evolution reaction with electrocatalytic alcohol oxidation. In this work, we have developed a multimetallic Prussian blue analogue (MnFeCoNiCu-PBA) nanoparticles using a room temperature method and utilized it for anodic oxygen evolution reaction (OER) and benzyl alcohol (BA) oxidation. The multimetallic composition resulted in the enhanced synergistic effect and increased the electrochemical surface area and electronic conductivity to improve the catalytic performance. Interestingly, MnFeCoNiCu-PBA nanoparticles exhibited a 100 mA cm^–2 current density for BA oxidation at 1.57 V vs RHE, which was lower than that of OER (1.67 V vs RHE), with 98.9% Faradaic efficiency and 100% selectivity for benzoic acid production. Besides, the hydrogen production was improved by 2.2 times with the BA oxidation compared to the OER. During the electrocatalytic BA oxidation, multimetallic PBA was electrochemically reconstructed into an active metal hydroxide-(oxy)hydroxide catalyst with high valent metal ions, further improving the activity.

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用于氧进化反应和高效苄醇氧化的多金属普鲁士蓝类似物纳米粒子

电催化酒精辅助水分离技术在提高水分离能效方面受到了广泛关注。一系列金属有机框架（MOFs）已被用于用电催化酒精氧化取代阳极氧进化反应。在这项工作中，我们采用室温方法开发了一种多金属普鲁士蓝类似物（MnFeCoNiCu-PBA）纳米粒子，并将其用于阳极氧进化反应（OER）和苯甲醇（BA）氧化。多金属成分增强了协同效应，增加了电化学表面积和电子传导性，从而提高了催化性能。有趣的是，MnFeCoNiCu-PBA 纳米粒子在 BA 氧化过程中的电流密度为 100 mA cm-2，相对于 RHE 为 1.57 V，低于 OER（相对于 RHE 为 1.67 V），法拉第效率为 98.9%，苯甲酸生产的选择性为 100%。此外，与 OER 相比，BA 氧化的产氢量提高了 2.2 倍。在电催化 BA 氧化过程中，多金属 PBA 通过电化学重构为具有高价金属离子的活性金属氢氧化物-（氧）氢氧化物催化剂，进一步提高了活性。

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来源期刊

ACS Applied Nano Materials Multiple-

CiteScore

8.30

自引率

3.40%

发文量

1601

期刊介绍： ACS Applied Nano Materials is an interdisciplinary journal publishing original research covering all aspects of engineering, chemistry, physics and biology relevant to applications of nanomaterials. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important applications of nanomaterials.