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Phosphorus‐Doped Iron Nitride Nanoparticles Encapsulated by Nitrogen‐Doped Carbon Nanosheets on Iron Foam In Situ Derived from Saccharomycetes Cerevisiae for Electrocatalytic Overall Water Splitting
Author(s) -
Li Guixiang,
Yu Jiayuan,
Yu Wanqiang,
Yang Linjing,
Zhang Xiaoli,
Liu Xiaoyan,
Liu Hong,
Zhou Weijia
Publication year - 2020
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.202001980
Subject(s) - materials science , nitride , chemical engineering , calcination , oxygen evolution , water splitting , catalysis , nanoparticle , inorganic chemistry , carbon fibers , anode , electrode , nanotechnology , electrochemistry , chemistry , layer (electronics) , composite material , organic chemistry , photocatalysis , composite number , engineering
It is vitally essential to propose a novel, economical, and safe preparation method to design highly efficient electrocatalysts. Herein, phosphorus‐doped iron nitride nanoparticles encapsulated by nitrogen‐doped carbon nanosheets are grown directly on the iron foam substrate (P‐Fe 3 N@NC NSs/IF) by in situ deriving from Saccharomycetes cerevisiae ( S. cerevisiae ), where anion elements of C, N, and P all from S. cerevisiae replace the hazardous CH 4 , NH 3 , and H 3 P. The diffusion pattern of N, P in S. cerevisiae and contact form between metal and S. cerevisiae observably affect the composition and phase of the product during high‐temperature calcination. The obtained P‐Fe 3 N@NC NSs/IF demonstrates superior electrocatalytic performance for the hydrogen evolution reaction and oxygen evolution reaction, also satisfying durability. Theoretical calculation confirms that Fe sites of P‐Fe 3 N serve as the active center, and N sites and P doping regulate the hydrogen binding strength to enhance catalytic ability. Additionally, the two‐electrode electrolyzer assembled by P‐Fe 3 N@NC NSs/IF as both anode and cathode electrodes needs only 1.61 V to reach 10 mA cm −2 for overall water splitting with a superb stability. The S. cerevisiae ‐based process presents a feasible approach for synthesis of nitrides, carbides, phosphides, and electrocatalytic applications.