共价键结合的双金属铂钌碳纳米管复合材料及对高效甲醇氧化反应研究

张婷; 王万宗; 马征; 柏雷; 姚悦; 徐冬青

doi:10.1007/s12613-023-2699-1

Volume 30 Issue 9

Sep. 2023

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文章导航 > 矿物冶金与材料学报（英文） > 2023 > 30(9): 1816-1823

Ting Zhang, Wanzong Wang, Zheng Ma, Lei Bai, Yue Yao, and Dongqing Xu, Bimetallic Pt–Ru covalently bonded on carbon nanotubes for efficient methanol oxidation, Int. J. Miner. Metall. Mater., 30(2023), No. 9, pp. 1816-1823. https://doi.org/10.1007/s12613-023-2699-1

Cite this article as:

Ting Zhang, Wanzong Wang, Zheng Ma, Lei Bai, Yue Yao, and Dongqing Xu, Bimetallic Pt–Ru covalently bonded on carbon nanotubes for efficient methanol oxidation, Int. J. Miner. Metall. Mater., 30(2023), No. 9, pp. 1816-1823. https://doi.org/10.1007/s12613-023-2699-1

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研究论文

共价键结合的双金属铂钌碳纳米管复合材料及对高效甲醇氧化反应研究

1)
安徽科技学院化学与材料工程学院, 凤阳 233100, 中国
2)
安徽科技学院生命与健康科学学院, 凤阳 233100, 中国

通讯作者:
徐冬青 E-mail: xudongq@163.com

文章亮点

(1) 采用绿色水热法制备了双金属铂钌碳纳米管复合材料。

(2) 超小尺寸的双金属铂钌纳米粒子通过共价键均匀负载到F-MWCNTs表面。

(3) Pt–Ru@MWCNT纳米复合材料对MOR的电催化活性远高于20wt%的商业Pt@C和其它合成的纳米复合材料。

(4) Pt–Ru@MWCNT纳米复合材料由于其特殊的微观结构，被认为是一种优良的、持久的MOR催化剂。

中文摘要

铂类纳米复合材料被认为是甲醇氧化反应（MOR）中最有前途的催化剂之一，但由于其电子转移性能低、易毒化以及电化学活性较差，导致其在实际应用中仍然面临巨大的挑战。本文报道了一种具有良好电化学性能的铂钌碳纳米管复合材料(Pt–Ru@MWCNT)并应用于甲醇氧化反应。该材料的制备是从功能性多壁碳纳米管(F-MWCNTs)出发，在不添加还原剂的情况下，通过简单、环保的方法合成了Pt–Ru@MWCNT纳米复合材料，铂钌双金属纳米粒子与功能性碳纳米管上的氧原子形成M–O–C共价键的方式均匀的负载到碳纳米管上形成双金属Pt–Ru@MWCNT纳米复合材料。采用傅里叶变换红外、电子能谱、透射电镜和电化学测量等实验研究了纳米复合材料的表面官能团、微观结构和形态以及电化学性能。研究结果表明，在功能性碳纳米管表面铂钌双金属纳米粒子与氧原子形成M–O–C共价键的方式均匀的负载到碳纳米管上；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类纳米复合材料的ECSA分别高出2.67和4.0倍，这是主要由于M–O–C共价键的产生改善了材料的电子转移性能。此外，将Ru原子引入Pt@MWCNT纳米复合材料中，增强了材料的抗CO中毒能力。

关键词:

Research Article

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

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Abstract

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.
- bimetallic Pt–Ru nanocomposite;
- high loaded;
- functionalized multi-walled carbon nanotubes;
- methanol oxidation;
- green hydrothermal synthesis

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