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Ultrafine Fe-modulated Ni nanoparticles embedded within nitrogen-doped carbon from Zr-MOFs-confined conversion for efficient oxygen evolution reaction

查看全文 作　　者：Lingtao [1]Kong;Zhouxun [1]Li;Hui [1]Zhang;Mengmeng [1]Zhang;Jiaxing [1]Zhu;Mingli [1]Deng;Zhenxia [1]Chen;Yun [1]Ling;Yaming [1]Zhou 高影响力作者 机构地区：[1]Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials,Department of Chemistry,Fudan University,Shanghai 200433,China高影响力机构 出　　处：《Frontiers of Chemical Science and Engineering》索引2022年第16卷第7期,共11页高影响力期刊 基　　金：financial support from the National Key Technologies R&D Program of China(Grant No.2017YFA0205103);the National Natural Science Foundation of China(Grant No.21971045);the Natural Science Foundation of Shanghai(Grant No.18ZR1402900);Shanghai Leading Academic Discipline Project(Grant No.B108). 摘　　要：Improvement of the low-cost transition metal electrocatalyst used in sluggish oxygen evolution reaction is a significant but challenging problem. In this study, ultrafine Fe-modulated Ni nanoparticles embedded in a porous Ni-doped carbon matrix were produced by the pyrolysis of zirconium metal–organic–frameworks, in which 2,2′-bipyridine-5,5′-dicarboxylate operating as a ligand can coordinate with Ni^(2+) and Fe^(3+). This strategy allows formation of Fe-modulated Ni nanoparticles with a uniform dimension of about 2 nm which can be ascribed to the spatial blocking effect of ZrO_(2). This unique catalyst displays an efficient oxygen evolution reaction electrocatalytic activity with a low overpotential of 372 mV at 10 mA·cm^(–2) and a small Tafel slope of 84.4 mV·dec^(–1) in alkaline media. More importantly, it shows superior durability and structural stability after 43 h in a chronoamperometry test. Meanwhile, it shows excellent cycling stability during 4000 cyclic voltammetry cycles. This research offers a new insight into the construction of uniform nanoscale transition metals and their alloys as highly efficient and durable electrocatalysts. 关 键 词：metal–organic framework PYROLYSIS ULTRAFINE Fe-modulated Ni nanoparticles oxygen evolution reaction
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