Hina Naz , Rai Nauman Ali , Waqar Ahmad Qureshi , Syed Najeeb-uz-Zaman Haider , Hongbo Zhou , Guoxing Zhu
{"title":"Rational design of RuO2 composites from hydrogen-bonded organic frameworks for alkaline oxygen evolution reaction","authors":"Hina Naz , Rai Nauman Ali , Waqar Ahmad Qureshi , Syed Najeeb-uz-Zaman Haider , Hongbo Zhou , Guoxing Zhu","doi":"10.1016/j.mtsust.2024.100892","DOIUrl":null,"url":null,"abstract":"<div><p>In the past few decades, the task of creating electrocatalysts with consistent costs for facilitating oxygen evolution reactions with minimal overpotential remains a formidable challenge in the realm of chemical energy conversion technologies. In this report, we present a straightforward approach for synthesizing the melamine trithiocynauric acid (MTC) and ruthenium dioxide (RuO<sub>2</sub>) based, MTC/RuO<sub>2</sub> composite, which demonstrates high efficiency in catalyzing oxygen evolution reaction. The physical characterizations for the prepared material are x-ray diffraction (XRD), scanning electron microscopy (SEM), and x-ray photoelectron spectrometer (XPS) all approve the presence of RuO<sub>2</sub> in the MTC composite structure. For oxygen evolution reaction the composite (MTC/RuO<sub>2</sub>-0.2) exhibited an exceptionally low overpotential of 190 mV for the current density of 10 mA cm<sup>−2</sup> and also demonstrated a Tafel slope of 52 mV dec<sup>−1</sup>. Significant improvement in electrocatalytic activity is observed in alkaline electrolyte (1 M KOH). The outstanding behavior of the catalyst is due to the structural synergistic effect between MTC and RuO<sub>2</sub>. So far there is no report on RuO<sub>2</sub>-based hydrogen bonded organic frameworks for oxygen evolution reaction. The catalyst also shows high stability for almost 24 h. Hence, the MTC/RuO<sub>2</sub>-0.2 composite is highly unique and efficient.</p></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":null,"pages":null},"PeriodicalIF":7.1000,"publicationDate":"2024-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials Today Sustainability","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2589234724002288","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
In the past few decades, the task of creating electrocatalysts with consistent costs for facilitating oxygen evolution reactions with minimal overpotential remains a formidable challenge in the realm of chemical energy conversion technologies. In this report, we present a straightforward approach for synthesizing the melamine trithiocynauric acid (MTC) and ruthenium dioxide (RuO2) based, MTC/RuO2 composite, which demonstrates high efficiency in catalyzing oxygen evolution reaction. The physical characterizations for the prepared material are x-ray diffraction (XRD), scanning electron microscopy (SEM), and x-ray photoelectron spectrometer (XPS) all approve the presence of RuO2 in the MTC composite structure. For oxygen evolution reaction the composite (MTC/RuO2-0.2) exhibited an exceptionally low overpotential of 190 mV for the current density of 10 mA cm−2 and also demonstrated a Tafel slope of 52 mV dec−1. Significant improvement in electrocatalytic activity is observed in alkaline electrolyte (1 M KOH). The outstanding behavior of the catalyst is due to the structural synergistic effect between MTC and RuO2. So far there is no report on RuO2-based hydrogen bonded organic frameworks for oxygen evolution reaction. The catalyst also shows high stability for almost 24 h. Hence, the MTC/RuO2-0.2 composite is highly unique and efficient.
期刊介绍:
Materials Today Sustainability is a multi-disciplinary journal covering all aspects of sustainability through materials science.
With a rapidly increasing population with growing demands, materials science has emerged as a critical discipline toward protecting of the environment and ensuring the long term survival of future generations.