Solid-State Synthesis of Highly Dispersed Nitrogen-Coordinated Single Iron Atom Electrocatalysts for Proton Exchange Membrane Fuel Cells | Zendy

Fei Xiao | Zendy; Xiang Liu | Zendy; ChengJun Sun | Zendy; Inhui Hwang | Zendy; Qi Wang | Zendy; Zhiwen Xu | Zendy; Yian Wang | Zendy; Shangqian Zhu | Zendy; Hsiwen Wu | Zendy; Zidong Wei | Zendy; Liping Zheng | Zendy; Daojian Cheng | Zendy; Meng Gu | Zendy; GuiLiang Xu | Zendy; Khalil Amine | Zendy; Minhua Shao | Zendy

Open Access

Solid-State Synthesis of Highly Dispersed Nitrogen-Coordinated Single Iron Atom Electrocatalysts for Proton Exchange Membrane Fuel Cells

Author(s) -

Fei Xiao,

Xiang Liu,

ChengJun Sun,

Inhui Hwang,

Qi Wang,

Zhiwen Xu,

Yian Wang,

Shangqian Zhu,

Hsiwen Wu,

Zidong Wei,

Liping Zheng,

Daojian Cheng,

Meng Gu,

GuiLiang Xu,

Khalil Amine,

Minhua Shao

Publication year - 2021

Publication title -

nano letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 4.853

H-Index - 488

eISSN - 1530-6992

pISSN - 1530-6984

DOI - 10.1021/acs.nanolett.1c00702

Subject(s) - proton exchange membrane fuel cell , catalysis , metal , carbon fibers , platinum , chemical engineering , cathode , atom (system on chip) , nitrogen , chemistry , adsorption , materials science , inorganic chemistry , nanotechnology , organic chemistry , composite number , computer science , engineering , composite material , embedded system

Fe-N-C with atomically dispersed Fe single atoms is the most promising candidate to replace platinum for the oxygen reduction reaction (ORR) in fuel cells. However, the conventional synthesis procedures require quantities solvents and metal precursors, sluggish adsorption process, and tedious washing, resulting in limited metal doping and uneconomical for large-scale production. For the first time, Fe 2 O 3 is adopted as the Fe precursor to derive abundant single Fe atoms dispersed on carbon surfaces. The Fe-N-C catalyst synthesized by this simple method shows an excellent ORR activity with half-wave potentials of 0.82 and 0.90 V in acidic and alkaline solutions, respectively. A single fuel cell with an optimized Fe-N-C cathode shows a high peak power density of 0.84 W cm -2 . The solid-state transformation synthesis method developed in this study may shed light on mass production of single-atom-based catalysts.

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