青岛科技大学  English 
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教授 博士生导师  
硕士生导师  

教师拼音名称:linjianjian

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入职时间:2018-09-11

所在单位:化学与分子工程学院

学历:博士研究生

办公地点:四方校区第一实验楼216

性别:女

联系方式:19862229511

学位:工学博士

职称:教授

毕业院校:澳大利亚伍伦贡大学

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A facile surfactant-assisted synthesis of carbon-supported dendritic Pt nanoparticles with high electrocatalytic performance for the oxygen reduction reaction

关键字:Synthesis (chemical);Carbon - Catalysts - Electrolytic reduction - Metal nanoparticles - Nonionic surfactants - Oxygen - Platinum

摘要:Dendritic platinum (Pt) nanoparticles are successfully anchored on Ketjen Black by a facile synthetic route without organic solvent. The nonionic surfactant Brij 58 is used as a mesopore-forming agent during the in-situ growth of Pt nanoparticles. The dendritic Pt nanoparticles on Ketjen Black exhibit highly efficient electrocatalytic activity for the oxygen reduction reaction. The electrocatalytic activity can be further improved by increasing the Pt loading amount on Ketjen Black. Upon increasing to 31.4 wt% Pt, the half-wave potential and limited-diffusion current density reach 0.887 V and 6.22 mA cm<sup>−2</sup>, respectively. The as-prepared catalyst shows an ideal four-electron pathway of O<inf>2</inf> reduction to H<inf>2</inf>O and a low H<inf>2</inf>O<inf>2</inf> yield of less than 1% in the potential window of 0.2–0.8 V. Moreover, the catalyst exhibits remarkable long-term durability with the same limiting current density and only a 10.5 mV negative shift in the half-wave potential after 5000 cycles.<br/> © 2019 Elsevier Inc.

卷号:280

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