Literature DB >> 25723811

New approach to fully ordered fct-FePt nanoparticles for much enhanced electrocatalysis in acid.

Qing Li1, Liheng Wu1, Gang Wu2, Dong Su3, Haifeng Lv1, Sen Zhang1, Wenlei Zhu1, Anix Casimir2, Huiyuan Zhu1, Adriana Mendoza-Garcia1, Shouheng Sun1.   

Abstract

Fully ordered face-centered tetragonal (fct) FePt nanoparticles (NPs) are synthesized by thermal annealing of the MgO-coated dumbbell-like FePt-Fe3O4 NPs followed by acid washing to remove MgO. These fct-FePt NPs show strong ferromagnetism with room temperature coercivity reaching 33 kOe. They serve as a robust electrocatalyst for the oxygen reduction reaction (ORR) in 0.1 M HClO4 and hydrogen evolution reaction (HER) in 0.5 M H2SO4 with much enhanced activity (the most active fct-structured alloy NP catalyst ever reported) and stability (no obvious Fe loss and NP degradation after 20 000 cycles between 0.6 and 1.0 V (vs RHE)). Our work demonstrates a reliable approach to FePt NPs with much improved fct-ordering and catalytic efficiency for ORR and HER.

Entities:  

Keywords:  electrocatalysis; face-centered tetragonal structure; hydrogen evolution; nanoparticles; oxygen reduction

Year:  2015        PMID： 25723811     DOI： 10.1021/acs.nanolett.5b00320

Source DB:  PubMed          Journal:  Nano Lett        ISSN： 1530-6984            Impact factor:   11.189


  19 in total

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Journal:  Nat Commun       Date:  2017-04-24       Impact factor: 14.919
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