Bimetallic Pt–Ru covalently bonded on carbon nanotubes for efficient methanol oxidation

IF 5.6 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY International Journal of Minerals, Metallurgy, and Materials Pub Date : 2023-08-25 DOI:10.1007/s12613-023-2699-1

Ting Zhang, Wanzong Wang, Zheng Ma, Lei Bai, Yue Yao, Dongqing Xu

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Abstract

Platinum-based nanocomposites have been considered as one of the most promising catalysts for methanol oxidation reactions (MORs), which yet still suffer from low electrochemical activity and electron-transfer properties. Apart from van-der-Waals heterostructures, herein, we report a novel nanocomposite with the structure of Pt–Ru bimetallic nanoparticles covalently-bonded onto multi-walled carbon nanotubes (MWCNTs) (Pt–Ru@MWCNT), which have been successfully fabricated via a facile and green synthesis method. It is demonstrated that the Pt–Ru@MWCNT nanocomposite possesses much enhanced electrocatalytic activity with the electrochemical active surface area (ECSA) of 110.4 m²·g⁻¹ for Pt towards MOR, which is 2.67 and 4.0 times higher than those of 20wt% commercial Pt@C and Pt-based nanocomposite prepared by other method, due to the improved electron-transfer properties originated from M–O–C covalent bonds. This work provides us a new strategy for the structural design of highly-efficient electrocatalysts in boosting MOR performance.

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碳纳米管上铂钌共价键合的高效甲醇氧化研究

铂基纳米复合材料被认为是甲醇氧化反应(MORs)中最有前途的催化剂之一，但其电化学活性和电子转移性能仍然较低。除了范德华异质结构外，本文还报道了一种新型的纳米复合材料，其结构是由Pt - ru双金属纳米颗粒共价键合在多壁碳纳米管(MWCNTs)上(Pt - Ru@MWCNT)，该材料已经通过一种简单的绿色合成方法成功制备出来。结果表明，Pt- Ru@MWCNT纳米复合材料对MOR的电化学活性表面积(ECSA)为110.4 m2·g−1，比20wt%的商用Pt@C和其他方法制备的Pt基纳米复合材料的电化学活性表面积(ECSA)分别高2.67和4.0倍，这是由于M-O-C共价键的电子转移性质得到了改善。本研究为高效电催化剂的结构设计提供了一种新的策略。

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来源期刊

International Journal of Minerals, Metallurgy, and Materials 工程技术-材料科学：综合

CiteScore

9.30

自引率

16.70%

发文量

205

审稿时长

2 months

期刊介绍： International Journal of Minerals, Metallurgy and Materials (Formerly known as Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material) provides an international medium for the publication of theoretical and experimental studies related to the fields of Minerals, Metallurgy and Materials. Papers dealing with minerals processing, mining, mine safety, environmental pollution and protection of mines, process metallurgy, metallurgical physical chemistry, structure and physical properties of materials, corrosion and resistance of materials, are viewed as suitable for publication.