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5.20】功能材料沙龙第45期活动
主讲嘉宾:郭少军 教授
题目:材料应变驱动高效能源电催化
2019-05-09 | 供稿: 青年职工俱乐部        【 】【打印】【关闭

报告题目:材料应变驱动高效能源电催化 

主讲嘉宾:郭少军 教授(北京大学) 

时   间:520日(周一)15:30  

地   点:李薰楼356会议室 

    

报告简介 

  Proton exchange membrane fuel cells (PEMFCs) are generally expected to be the ideal alternative to traditional internal combustion engine as energy-supplying devices for transportation, which consumes nearly 25% of the global energy. However, to guarantee the wide-adoption of PEMFCs, it still requires an efficient electrocatalyst, with higher activity/stability and lower Pt usage than the state-of-the-art carbon supported platinum nanoparticles (Pt/C), towards the cathodic oxygen reduction reaction. But, the absence of low-platinum, high-activity and satisfied-durability electrocatalysts for oxygen reduction reaction has bottlenecked the wide-adoption of PEMFCs for decades. To address this challenge, an efficient strategy is to modify the electronic structure of Pt by alloying with other cheap transition metals (M), normally called ligand or electronic effect. Tuning or controlling the surface strain in multimetallic nanomaterials is a robust method to boost electrocatalytic performance, and tremendous progress has been made in this area in the past decade. In this talk, I will show recent important advances in how to tune the compressive and tensile strain in multimetallic nanocrystals to achieve more efficient energy conversion by electrocatalysis. I will start with the introduction of stain and the basic information on how to tune the strain for the electronic structure tuning. Then, I will give several examples on designing metal-based materials with interesting strain effects for boosting oxygen reduction and hydrogen evolution reaction catalysis. In particular, I will highlight our recent important results on making PtPb/Pt core/shell nanoplates with biaxial strain for boosting oxygen reduction catalysis, which exhibit much higher activity and stability for oxygen reduction catalysis. Furthermore, I will show that our strain tuning concept will be extended to other Pd-based and transition metal-based materials system for greatly enhancing oxygen reduction and hydrogen evolution catalysis. 

    

主讲嘉宾简介: 

  郭少军,北京大学教授,博士生导师。全球高被引科学家、英国皇家化学学会会士、爱思唯尔高被引学者、北京首届杰青、国家千青。长期从事电催化、储能电池与生物传感材料研究,在材料应变驱动高效金属能源电催化领域取得创新性和系统性的研究成果。独立皇族电竞开户后以通讯作者在Nature, ScienceNature Reviews Materials等期刊发表论文100余篇。获Journal of Materials Chemistry讲座奖、国际电化学会应用电化学奖、皇族电竞开户青年分析化学家奖和皇族电竞开户电化学会青年科学家奖等学术奖励。兼任ACS Omega副主编,Science China MaterialsNano Materials ScienceScience BulletinEnergyChem7个国内外杂志的编委。现任北京化学会理事、皇族电竞开户材料研究会青年委员会-副秘书长、理事等学术职务。 

    

欢迎广大职工和研究生前来交流! 

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