{"title":"High-Performance Intermetallic Pt3Co/C Electrocatalyst for the Oxygen Reduction Reaction Synthesized by Pre-Lithiation Method.","authors":"Zheng Ying Zhang, Dong Fang, Liyang Li, Hua Yang, Jian Liu, Feng Liu, Yong Gao, Olim Ruzimuradov","doi":"10.1002/cplu.202400626","DOIUrl":null,"url":null,"abstract":"<p><p>Fuel cells are recognized as promising alternatives to existing conventional energy systems for a sustainable future. However, the synthesis of efficient and robust platinum (Pt) based catalysts remains a challenge for practical fuel cell applications. Herein, the Pt3Co/C nanoparticles with about 4.45 nm are firstly prepared by a pre-lithiation-deposition strategy on C carrier and used as efficient electrocatalysts for cathodic oxygen reduction reaction. Notably, after heat treatment at 600 ℃, the obtained Pt3Co/C-600 catalyst shows excellent mass and specific activities (MA and SA) of 0.69 A mgPt-1 and 1.01 mA cmPt-2, respectively, which are more than one order of magnitude higher than that of Pt/C-600. In particular, after accelerated durability testing with 20k cycles, the durability of the Pt3Co/C-600 catalyst (98.3% retention of MA) is much higher than that of Pt3Co/C-600 without pre-lithiation (42.5% retention of MA). The alloying of Pt and Co and the use of pre-lithiation to enable strong interactions between the carbon carriers and the Pt-Co nanoparticles contributed to the increased activity and excellent stability. This work provides a new perspective for the development of high-performance and low-cost Pt alloy electrocatalysts.</p>","PeriodicalId":148,"journal":{"name":"ChemPlusChem","volume":null,"pages":null},"PeriodicalIF":3.0000,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"ChemPlusChem","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1002/cplu.202400626","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
Fuel cells are recognized as promising alternatives to existing conventional energy systems for a sustainable future. However, the synthesis of efficient and robust platinum (Pt) based catalysts remains a challenge for practical fuel cell applications. Herein, the Pt3Co/C nanoparticles with about 4.45 nm are firstly prepared by a pre-lithiation-deposition strategy on C carrier and used as efficient electrocatalysts for cathodic oxygen reduction reaction. Notably, after heat treatment at 600 ℃, the obtained Pt3Co/C-600 catalyst shows excellent mass and specific activities (MA and SA) of 0.69 A mgPt-1 and 1.01 mA cmPt-2, respectively, which are more than one order of magnitude higher than that of Pt/C-600. In particular, after accelerated durability testing with 20k cycles, the durability of the Pt3Co/C-600 catalyst (98.3% retention of MA) is much higher than that of Pt3Co/C-600 without pre-lithiation (42.5% retention of MA). The alloying of Pt and Co and the use of pre-lithiation to enable strong interactions between the carbon carriers and the Pt-Co nanoparticles contributed to the increased activity and excellent stability. This work provides a new perspective for the development of high-performance and low-cost Pt alloy electrocatalysts.
期刊介绍:
ChemPlusChem is a peer-reviewed, general chemistry journal that brings readers the very best in multidisciplinary research centering on chemistry. It is published on behalf of Chemistry Europe, an association of 16 European chemical societies.
Fully comprehensive in its scope, ChemPlusChem publishes articles covering new results from at least two different aspects (subfields) of chemistry or one of chemistry and one of another scientific discipline (one chemistry topic plus another one, hence the title ChemPlusChem). All suitable submissions undergo balanced peer review by experts in the field to ensure the highest quality, originality, relevance, significance, and validity.