{"title":"Porous CeO<sub>2</sub>/CuO Heterostructure for Efficient Hydrogen Evolution Reaction in an Acidic Medium.","authors":"Binod Raj Kc, Samira Munkaila, Bishnu Prasad Bastakoti","doi":"10.1002/open.202500115","DOIUrl":null,"url":null,"abstract":"<p><p>A composite electrocatalyst CeO<sub>2</sub>/CuO is fabricated for the hydrogen evolution reaction (HER) via a simple, facile, one-step hydrothermal method, using F-127 as a template and structure directing agent. The prepared composite CeO<sub>2</sub>/CuO shows top-notch HER activities with a small overpotential of 98 mV at 10 mA cm<sup>-2</sup> and just 160 mV overpotential to attain a current density of 50 mA cm<sup>-2</sup> with good stability for 20 h in an acidic medium. The enhanced catalytic activities of CeO<sub>2</sub>/CuO nanocomposite are attributed to their synergetic interface interaction, which lead to improved conductivity, reactive sites, and oxygen vacancies in their lattices. This study aims to advance the development of earth-abundant transition metal oxides-based electrocatalysts as economical, durable, and efficient HER electrocatalysts to replace noble metal-based materials in the future.</p>","PeriodicalId":9831,"journal":{"name":"ChemistryOpen","volume":" ","pages":"e2500115"},"PeriodicalIF":2.5000,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"ChemistryOpen","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1002/open.202500115","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
A composite electrocatalyst CeO2/CuO is fabricated for the hydrogen evolution reaction (HER) via a simple, facile, one-step hydrothermal method, using F-127 as a template and structure directing agent. The prepared composite CeO2/CuO shows top-notch HER activities with a small overpotential of 98 mV at 10 mA cm-2 and just 160 mV overpotential to attain a current density of 50 mA cm-2 with good stability for 20 h in an acidic medium. The enhanced catalytic activities of CeO2/CuO nanocomposite are attributed to their synergetic interface interaction, which lead to improved conductivity, reactive sites, and oxygen vacancies in their lattices. This study aims to advance the development of earth-abundant transition metal oxides-based electrocatalysts as economical, durable, and efficient HER electrocatalysts to replace noble metal-based materials in the future.
以F-127为模板剂和结构导向剂，采用简单易行的一步水热法制备了CeO2/CuO复合电催化剂用于析氢反应。制备的CeO2/CuO复合材料在10 mA cm-2下的过电位为98 mV，过电位仅为160 mV，具有一流的HER活性，电流密度为50 mA cm-2，在酸性介质中具有良好的稳定性20 h。CeO2/CuO纳米复合材料的催化活性增强是由于它们的协同界面相互作用，从而提高了电导率、活性位点和晶格中的氧空位。本研究的目的是推动地球资源丰富的过渡金属氧化物基电催化剂的发展，使其成为未来替代贵金属基材料的经济、耐用、高效的HER电催化剂。
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