Environmentally friendly PtNiCo nanocatalysts enhanced with multi-walled carbon nanotubes for sustainable methanol oxidation in an alkaline medium

IF 4.6 3区材料科学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Nanoscale Advances Pub Date : 2024-09-16 DOI:10.1039/D4NA00274A

Merve Akin, Anas El Attar, Ramazan Bayat, Muhammed Bekmezci, Badr Bouljoihel, Mama El Rhazi and Fatih Sen

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Abstract

In this study, trimetallic PtNiCo/MWCNT and PtNiCo catalysts were synthesized using a microwave method to reduce the amount of precious Pt. The prepared catalysts were characterized using XRD, TEM, and EDX mapping and their electrochemical performances for methanol oxidation were investigated. The results showed that the MWCNT-supported catalyst showed 2.42 times higher electrochemical activity than the PtNiCo catalyst with a peak current density of 283.14 mA cm⁻² at −0.2 V potential. Moreover, in long-term stability tests, it exhibited high stability and 4.97 times higher current density at the end of 3600 s. The results showed that the MWCNT-supported catalyst offered improved electron transfer, 4.7 times higher surface area, and resistance to CO poisoning. These performance improvements due to the trimetallic structure are mostly thought to help accelerate the dehydrogenation of methanol. This study contains important findings for future functional catalyst design in the fields of catalysis and energy conversion.

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使用多壁碳纳米管增强的环境友好型铂镍钴纳米催化剂在碱性介质中实现可持续甲醇氧化

本研究采用微波法合成了铂镍钴/MWCNT 和铂镍钴三金属催化剂，以减少贵重铂的用量。采用 XRD、TEM 和 EDX 图谱对所制备的催化剂进行了表征，并考察了它们在甲醇氧化中的电化学性能。结果表明，MWCNT 支持的催化剂的电化学活性是 PtNiCo 催化剂的 2.42 倍，在 -0.2 V 电位下的峰值电流密度为 283.14 mA cm-2。此外，在长期稳定性测试中，该催化剂表现出很高的稳定性，在 3600 秒结束时，其电流密度比 PtNiCo 催化剂高 4.97 倍。三金属结构带来的这些性能改善主要被认为有助于加速甲醇的脱氢反应。这项研究包含了未来催化和能源转换领域功能催化剂设计的重要发现。

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来源期刊

Nanoscale Advances Multiple-

CiteScore

8.00

自引率

2.10%

发文量

461

审稿时长

9 weeks