Catalytic Activity of MWCNTs Doped with Some Transition Metal Phthalocyanines and Modified with Silver in ORR

IF 0.5 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

International Journal of Self-Propagating High-Temperature Synthesis Pub Date : 2024-07-01 DOI:10.3103/s1061386224700080

K. Yu. Vinogradov, R. V. Shafigulin, V. M. Davydov, S. V. Vostrikov, M. V. Kuznetsov, A. V. Safonov, O. V. Belousova, A. V. Bulanova

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Abstract

Bimetallic oxygen reduction reaction (ORR) catalysts based on multi-walled carbon nanotubes (MWCNTs) doped with cobalt, copper, and nickel phthalocyanines and modified with silver (MWCNT–CoPc–Ag, MWCNT–CuPc–Ag, and WMCNT–NiPc–Ag) were obtained using high-temperature synthesis. The synthesis was carried out at 900°C in a nitrogen atmosphere. Scanning electron microscopy (SEM), low-temperature nitrogen adsorption–desorption, Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), and powder X-ray diffraction (XRD) were used to determine the physicochemical properties of the synthesized catalysts. The effect of high-temperature synthesis on the textural and morphological properties of materials was also studied. It was shown that the physicochemical parameters of materials largely depend on the nature of the metal in the composition of original phthalocyanine. The electrocatalytic activity of the materials was studied by linear voltammetry in a three-electrode cell with a rotating disk electrode and mercury oxide reference electrode. The MWCNT–CoPc–Ag catalyst showed high electrocatalytic activity in ORR, comparable to that of a commercial platinum catalyst, as well as high corrosion resistance.

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掺杂某些过渡金属酞菁并用银修饰的 MWCNT 在 ORR 中的催化活性

摘要利用高温合成技术获得了基于掺杂钴、铜和镍酞菁并用银修饰的多壁碳纳米管（MWCNT）的双金属氧还原反应（ORR）催化剂（MWCNT-CoPc-Ag、MWCNT-CuPc-Ag 和 WMCNT-NiPc-Ag）。合成过程在 900°C 的氮气环境中进行。利用扫描电子显微镜（SEM）、低温氮吸附-解吸、拉曼光谱、X 射线光电子能谱（XPS）和粉末 X 射线衍射（XRD）测定了合成催化剂的理化性质。此外，还研究了高温合成对材料质构和形态特性的影响。结果表明，材料的物理化学参数在很大程度上取决于原始酞菁成分中金属的性质。在带有旋转盘电极和氧化汞参比电极的三电极电池中，通过线性伏安法研究了材料的电催化活性。MWCNT-CoPc-Ag 催化剂在 ORR 中表现出很高的电催化活性，可与商用铂催化剂相媲美，同时还具有很高的耐腐蚀性。

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来源期刊

International Journal of Self-Propagating High-Temperature Synthesis MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

1.00

自引率

33.30%

发文量

期刊介绍： International Journal of Self-Propagating High-Temperature Synthesis is an international journal covering a wide range of topics concerned with self-propagating high-temperature synthesis (SHS), the process for the production of advanced materials based on solid-state combustion utilizing internally generated chemical energy. Subjects range from the fundamentals of SHS processes, chemistry and technology of SHS products and advanced materials to problems concerned with related fields, such as the kinetics and thermodynamics of high-temperature chemical reactions, combustion theory, macroscopic kinetics of nonisothermic processes, etc. The journal is intended to provide a wide-ranging exchange of research results and a better understanding of developmental and innovative trends in SHS science and applications.

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