{"title":"Enhancing the Water Oxidation Performance of Bulk Al1.2CrFe2Ni2 High Entropy Alloy Through Deep Cryogenic Treatment","authors":"Xue-cai Zhang","doi":"10.1166/jno.2023.3486","DOIUrl":null,"url":null,"abstract":"Owing to the distinctive physical and chemical characteristics of high entropy alloys (HEAs), their application in electrocatalysis has become a possibility. However, selecting appropriate means to improve the oxygen evolution reaction (OER) performance of bulk HEAs remains an urgent problem. In this study, we obtained an OER electrocatalyst containing FCC + BCC phase bulk HEAs with high catalytic activity through simple vacuum melting and deep cryogenic treatment. After 36 hours of treatment, the overpotential of Al1.2CrFe2Ni2 HER is 278.8 mV at 10 mA cm−2 for OER with a small Tafel slope of 53.45 mV dec−1. The catalyst can be continuously electrolyzed in 1 M KOH for over 50 hours. This work confirms the potential of deep cryogenic treatment to improve the performance of bulk HEA catalysts for OER.","PeriodicalId":16446,"journal":{"name":"Journal of Nanoelectronics and Optoelectronics","volume":"1 1","pages":""},"PeriodicalIF":0.6000,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Nanoelectronics and Optoelectronics","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1166/jno.2023.3486","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
引用次数: 0
Abstract
Owing to the distinctive physical and chemical characteristics of high entropy alloys (HEAs), their application in electrocatalysis has become a possibility. However, selecting appropriate means to improve the oxygen evolution reaction (OER) performance of bulk HEAs remains an urgent problem. In this study, we obtained an OER electrocatalyst containing FCC + BCC phase bulk HEAs with high catalytic activity through simple vacuum melting and deep cryogenic treatment. After 36 hours of treatment, the overpotential of Al1.2CrFe2Ni2 HER is 278.8 mV at 10 mA cm−2 for OER with a small Tafel slope of 53.45 mV dec−1. The catalyst can be continuously electrolyzed in 1 M KOH for over 50 hours. This work confirms the potential of deep cryogenic treatment to improve the performance of bulk HEA catalysts for OER.
由于高熵合金（HEAs）具有独特的物理和化学特性，将其应用于电催化已成为可能。然而，选择适当的方法来提高块状高熵合金的氧进化反应（OER）性能仍然是一个亟待解决的问题。在本研究中，我们通过简单的真空熔化和深冷处理，获得了一种含有催化活性高的 FCC + BCC 相块状 HEA 的 OER 电催化剂。经过 36 小时处理后，Al1.2CrFe2Ni2 HER 在 10 mA cm-2 的过电位为 278.8 mV，OER 的塔菲尔斜率为 53.45 mV dec-1。该催化剂可在 1 M KOH 中连续电解 50 小时以上。这项工作证实了深度低温处理在提高块状 HEA 催化剂的 OER 性能方面的潜力。
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