水热合成MnWO@GO复合材料作为尿素氧化的非贵金属电催化剂

Hydrothermal Synthesis of MnWO@GO Composite as Non-Precious Electrocatalyst for Urea Oxidation.

作者信息

Nagajyothi Patnamsetty Chidanandha, Yoo Kisoo, Ramaraghavulu Rajavaram, Shim Jaesool

机构信息

School of Mechanical Engineering, Yeungnam University, Gyeongsan 38541, Korea.

Department of Humanities and Sciences, Annamacharya Institute of Technology and Sciences, Rajampet, Kadapa 516126, India.

出版信息

Nanomaterials (Basel). 2021 Dec 29;12(1):85. doi: 10.3390/nano12010085.

DOI:10.3390/nano12010085

PMID:35010036

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8746440/

Abstract

In this study, manganese tungstate (MW) and MW/graphene oxide (GO) composites were prepared by a facile hydrothermal synthesis at pH values of 7 and 12. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and Raman spectroscopy were used for the structural, compositional, and morphological characterization of the nanoparticles (NPs). The XRD analysis revealed that the formation of monoclinic MnWO did not have impurities. The SEM and TEM analyses showed that the synthesized NPs were rod-shaped and well-distributed on the GO. The as-synthesized samples can be used as electrocatalysts for the urea oxidation reaction (UOR). The MW@GO-12 electrocatalyst exhibited higher current density values compared to other electrocatalysts. This study provides a new platform for synthesizing inexpensive nanocomposites as promising electrocatalysts for energy storage and conversion applications.

摘要

在本研究中，通过简便的水热合成法在pH值为7和12的条件下制备了钨酸锰（MW）和MW/氧化石墨烯（GO）复合材料。采用X射线衍射（XRD）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）、X射线光电子能谱（XPS）和拉曼光谱对纳米颗粒（NPs）进行结构、成分和形态表征。XRD分析表明，单斜晶系MnWO的形成没有杂质。SEM和TEM分析表明，合成的NPs呈棒状且在GO上分布良好。合成的样品可作为尿素氧化反应（UOR）的电催化剂。与其他电催化剂相比，MW@GO-12电催化剂表现出更高的电流密度值。本研究为合成廉价的纳米复合材料提供了一个新平台，这些复合材料有望成为用于能量存储和转换应用的电催化剂。