Nb-MXene as promising material for electrocatalysis in energy conversion (OER/ORR) and storage

IF 7.2 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Applied Materials Today Pub Date : 2024-08-01 DOI:10.1016/j.apmt.2024.102356

Meriene Gandara, Milena Nakagawa de Arruda, João Marcos Kruszynski Assis, Marta de Jesus Oliveira Martins, Lazar Rakočević, Dušan Mladenović, Biljana Šljukić, Emerson Sarmento Gonçalves

{"title":"Nb-MXene as promising material for electrocatalysis in energy conversion (OER/ORR) and storage","authors":"Meriene Gandara, Milena Nakagawa de Arruda, João Marcos Kruszynski Assis, Marta de Jesus Oliveira Martins, Lazar Rakočević, Dušan Mladenović, Biljana Šljukić, Emerson Sarmento Gonçalves","doi":"10.1016/j.apmt.2024.102356","DOIUrl":null,"url":null,"abstract":"Low-cost non-noble metal electrocatalysts are currently the focus of research and development for energy conversion and storage devices. MXenes, the newest class of two-dimensional materials, have high surface area, nanometer layer thickness, hydrophilicity and high electrical conductivity that favor their performance for electrocatalytic reactions. Herein, niobium carbide MXene (Nb-MXene) was obtained from its MAX phase by chemical synthesis and characterized regarding its morphology, structure and electrochemical activity for oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) as well as for charge storage in different electrolytic media. The results demonstrate the good performance of Nb-MXene for storing charge (104 F g at 5 mV s) that increased remarkably with continuous cycling in an acidic medium. Current density for oxygen evolution of ∼32.5 mA cm was reached in alkaline medium. The oxygen reduction reaction in the same media was observed to proceed via 2e mechanism with a Tafel slope of 114 mV dec. Therefore, Nb-MXene presents characteristics and performance of a promising material for electrocatalytic reactions.","PeriodicalId":8066,"journal":{"name":"Applied Materials Today","volume":"40 1","pages":""},"PeriodicalIF":7.2000,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Applied Materials Today","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1016/j.apmt.2024.102356","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

Low-cost non-noble metal electrocatalysts are currently the focus of research and development for energy conversion and storage devices. MXenes, the newest class of two-dimensional materials, have high surface area, nanometer layer thickness, hydrophilicity and high electrical conductivity that favor their performance for electrocatalytic reactions. Herein, niobium carbide MXene (Nb-MXene) was obtained from its MAX phase by chemical synthesis and characterized regarding its morphology, structure and electrochemical activity for oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) as well as for charge storage in different electrolytic media. The results demonstrate the good performance of Nb-MXene for storing charge (104 F g at 5 mV s) that increased remarkably with continuous cycling in an acidic medium. Current density for oxygen evolution of ∼32.5 mA cm was reached in alkaline medium. The oxygen reduction reaction in the same media was observed to proceed via 2e mechanism with a Tafel slope of 114 mV dec. Therefore, Nb-MXene presents characteristics and performance of a promising material for electrocatalytic reactions.

查看原文本刊更多论文

Nb-MXene 是一种用于能量转换（OER/ORR）和储存的电催化材料，前景广阔

低成本的非贵金属电催化剂是目前能源转换和储存设备研发的重点。MXene是最新一类二维材料，具有高比表面积、纳米层厚、亲水性和高导电性，有利于发挥其在电催化反应中的性能。本文通过化学合成从碳化铌 MXene（Nb-MXene）的 MAX 相中获得了 Nb-MXene，并对其形态、结构、氧进化反应（OER）和氧还原反应（ORR）的电化学活性以及在不同电解介质中的电荷存储进行了表征。结果表明，Nb-MXene 具有良好的电荷存储性能（104 F g，5 mV s），在酸性介质中连续循环时电荷存储量显著增加。在碱性介质中，氧进化的电流密度达到了 ∼32.5 mA cm。因此，Nb-MXene 具有电催化反应材料的特征和性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Applied Materials Today Materials Science-General Materials Science

CiteScore

14.90

自引率

3.60%

发文量

393

审稿时长

26 days

期刊介绍： Journal Name: Applied Materials Today Focus: Multi-disciplinary, rapid-publication journal Focused on cutting-edge applications of novel materials Overview: New materials discoveries have led to exciting fundamental breakthroughs. Materials research is now moving towards the translation of these scientific properties and principles.