Construction of crystalline and amorphous interface between FeS2 and polyaniline for enhanced electrocatalytic activity

Wei Xiong; Altair T.F. Cheung; Yizhen Zhang; Keda Chen; Yong Shi; Xinyong Li; Michael K.H. Leung

doi:10.1016/j.apsusc.2019.144534

Construction of crystalline and amorphous interface between FeS₂ and polyaniline for enhanced electrocatalytic activity

Wei Xiong^*, Altair T.F. Cheung, Yizhen Zhang, Keda Chen, Yong Shi, Xinyong Li, Michael K.H. Leung^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

8 Citations (Scopus)

Abstract

We report a facile strategy to synthesize the FeS₂/polyaniline/exfoliated graphene (FeS₂/PANI /EG) with the formation of crystalline and amorphous interface for enhanced electrocatalytic activity. The PANI layer consists of nanowires roughly 100 nm in diameters and exhibits randomly distributed porous structure and the diameters of FeS₂ distributed from 5 nm to 15 nm. The transmission electron microscopy image indicates the successful construction of crystalline and amorphous interface between FeS₂ and PANI. In addition, the S element is doped into the PANI by forming C-S covalent bond. Thus, the prepared FeS₂/PANI/EG film shows excellent catalytic activity with the potential of 1.49 V at 10 mA cm⁻² for oxygen evolution reaction in 1 M KOH solution, comparing with the 1.59 V and 1.65 V for FeS₂/EG and PANI/EG, respectively.

Original language	English
Article number	144534
Journal	Applied Surface Science
Volume	505
Online published	6 Nov 2019
DOIs	https://doi.org/10.1016/j.apsusc.2019.144534
Publication status	Published - 1 Mar 2020

Research Keywords

Crystalline-amorphous interface
Electrocatalysis
FeS2/polyaniline
Oxygen evolution reaction

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@article{fa6b745783c14b188292263a32c49a5c,

title = "Construction of crystalline and amorphous interface between FeS2 and polyaniline for enhanced electrocatalytic activity",

abstract = "We report a facile strategy to synthesize the FeS2/polyaniline/exfoliated graphene (FeS2/PANI /EG) with the formation of crystalline and amorphous interface for enhanced electrocatalytic activity. The PANI layer consists of nanowires roughly 100 nm in diameters and exhibits randomly distributed porous structure and the diameters of FeS2 distributed from 5 nm to 15 nm. The transmission electron microscopy image indicates the successful construction of crystalline and amorphous interface between FeS2 and PANI. In addition, the S element is doped into the PANI by forming C-S covalent bond. Thus, the prepared FeS2/PANI/EG film shows excellent catalytic activity with the potential of 1.49 V at 10 mA cm−2 for oxygen evolution reaction in 1 M KOH solution, comparing with the 1.59 V and 1.65 V for FeS2/EG and PANI/EG, respectively.",

keywords = "Crystalline-amorphous interface, Electrocatalysis, FeS2/polyaniline, Oxygen evolution reaction",

author = "Wei Xiong and Cheung, {Altair T.F.} and Yizhen Zhang and Keda Chen and Yong Shi and Xinyong Li and Leung, {Michael K.H.}",

year = "2020",

month = mar,

day = "1",

doi = "10.1016/j.apsusc.2019.144534",

language = "English",

volume = "505",

journal = "Applied Surface Science",

issn = "0169-4332",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Construction of crystalline and amorphous interface between FeS2 and polyaniline for enhanced electrocatalytic activity

AU - Xiong, Wei

AU - Cheung, Altair T.F.

AU - Zhang, Yizhen

AU - Chen, Keda

AU - Shi, Yong

AU - Li, Xinyong

AU - Leung, Michael K.H.

PY - 2020/3/1

Y1 - 2020/3/1

N2 - We report a facile strategy to synthesize the FeS2/polyaniline/exfoliated graphene (FeS2/PANI /EG) with the formation of crystalline and amorphous interface for enhanced electrocatalytic activity. The PANI layer consists of nanowires roughly 100 nm in diameters and exhibits randomly distributed porous structure and the diameters of FeS2 distributed from 5 nm to 15 nm. The transmission electron microscopy image indicates the successful construction of crystalline and amorphous interface between FeS2 and PANI. In addition, the S element is doped into the PANI by forming C-S covalent bond. Thus, the prepared FeS2/PANI/EG film shows excellent catalytic activity with the potential of 1.49 V at 10 mA cm−2 for oxygen evolution reaction in 1 M KOH solution, comparing with the 1.59 V and 1.65 V for FeS2/EG and PANI/EG, respectively.

AB - We report a facile strategy to synthesize the FeS2/polyaniline/exfoliated graphene (FeS2/PANI /EG) with the formation of crystalline and amorphous interface for enhanced electrocatalytic activity. The PANI layer consists of nanowires roughly 100 nm in diameters and exhibits randomly distributed porous structure and the diameters of FeS2 distributed from 5 nm to 15 nm. The transmission electron microscopy image indicates the successful construction of crystalline and amorphous interface between FeS2 and PANI. In addition, the S element is doped into the PANI by forming C-S covalent bond. Thus, the prepared FeS2/PANI/EG film shows excellent catalytic activity with the potential of 1.49 V at 10 mA cm−2 for oxygen evolution reaction in 1 M KOH solution, comparing with the 1.59 V and 1.65 V for FeS2/EG and PANI/EG, respectively.

KW - Crystalline-amorphous interface

KW - Electrocatalysis

KW - FeS2/polyaniline

KW - Oxygen evolution reaction

UR - http://www.scopus.com/inward/record.url?scp=85075377773&partnerID=8YFLogxK

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85075377773&origin=recordpage

U2 - 10.1016/j.apsusc.2019.144534

DO - 10.1016/j.apsusc.2019.144534

M3 - RGC 21 - Publication in refereed journal

SN - 0169-4332

VL - 505

JO - Applied Surface Science

JF - Applied Surface Science

M1 - 144534

ER -