Comparative study on various morphologies of WS2 for electrochemical hydrogen evolution reaction

Journal of Science and Technology Pub Date : 2024-01-05 DOI:10.55401/jst.v6i4.2423

Dinh Anh Duc, Nguyen Duy The, Do Huu Ha, Nguyen Tran Truc Phuong, Le Dang Manh

{"title":"Comparative study on various morphologies of WS2 for electrochemical hydrogen evolution reaction","authors":"Dinh Anh Duc, Nguyen Duy The, Do Huu Ha, Nguyen Tran Truc Phuong, Le Dang Manh","doi":"10.55401/jst.v6i4.2423","DOIUrl":null,"url":null,"abstract":"Nowadays, the advancement of cost-effective and efficient electrocatalysts holds significant importance in facilitating the progress of high-performance electrochemical hydrogen evolution reaction (HER). Tungsten disulfides (WS2) are well recognized as highly promising electrocatalysts for HER due to their exceptional catalytic performance, outstanding stability, and comparatively affordable price. In this study, we used ammonium metatungstate hydrate and thioacetamide as precursors to fabricate WS2 nanoflowers (NFs) by hydrothermal method, whereas WS2-flakes were prepared from ammonium tetrathiotungstate through the thermolysis technique. These structures were evaluated for HER electrocatalytic activity in acidic media. The results revealed that WS2-NFs exhibit higher catalytic activity than WS2-flakes, with an overpotential of 325 mV to obtain a current density of 10 mA cm−2 and a Tafel slope of 92.3 mV dec−1. This performance was attributed to the larger electrochemically active surface area of WS2-NFs compared to WS2-flakes materials. The results of this study could bring the basis for further studies on the synthesis of WS2-based catalytic materials for HER. \n® 2023 Journal of Science and Technology - NTTU","PeriodicalId":17073,"journal":{"name":"Journal of Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2024-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Science and Technology","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.55401/jst.v6i4.2423","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}

引用次数: 0

Abstract

Nowadays, the advancement of cost-effective and efficient electrocatalysts holds significant importance in facilitating the progress of high-performance electrochemical hydrogen evolution reaction (HER). Tungsten disulfides (WS2) are well recognized as highly promising electrocatalysts for HER due to their exceptional catalytic performance, outstanding stability, and comparatively affordable price. In this study, we used ammonium metatungstate hydrate and thioacetamide as precursors to fabricate WS2 nanoflowers (NFs) by hydrothermal method, whereas WS2-flakes were prepared from ammonium tetrathiotungstate through the thermolysis technique. These structures were evaluated for HER electrocatalytic activity in acidic media. The results revealed that WS2-NFs exhibit higher catalytic activity than WS2-flakes, with an overpotential of 325 mV to obtain a current density of 10 mA cm−2 and a Tafel slope of 92.3 mV dec−1. This performance was attributed to the larger electrochemically active surface area of WS2-NFs compared to WS2-flakes materials. The results of this study could bring the basis for further studies on the synthesis of WS2-based catalytic materials for HER. ® 2023 Journal of Science and Technology - NTTU

查看原文本刊更多论文

用于电化学氢进化反应的 WS2 各种形态的比较研究

如今，开发具有成本效益的高效电催化剂对于促进高性能电化学氢进化反应（HER）的发展具有重要意义。二硫化钨（WS2）因其卓越的催化性能、出色的稳定性和相对低廉的价格，被公认为极具潜力的氢进化反应电催化剂。在本研究中，我们使用偏钨酸铵水合物和硫代乙酰胺作为前驱体，通过水热法制备了 WS2 纳米花（NFs），并通过热解技术从四硫代钨酸铵制备了 WS2 片。对这些结构在酸性介质中的 HER 电催化活性进行了评估。结果表明，WS2-NFs 比 WS2 片具有更高的催化活性，过电位为 325 mV，电流密度为 10 mA cm-2，塔菲尔斜率为 92.3 mV dec-1。这一性能归功于 WS2-NFs 与 WS2 片状材料相比具有更大的电化学活性表面积。本研究的结果为进一步研究合成基于 WS2 的 HER 催化材料奠定了基础。® 2023 科学与技术学报 - NTTU

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

Journal of Science and Technology

自引率

0.00%

发文量