Hydrothermally synthesized Iron Phosphate Hydroxide thin film electrocatalyst for electrochemical water splitting

Suraj A. Khalate; Sujit A. Kadam; Yuan Ron Ma; Sachin S. Pujari; Supriya J. Marje; Pranav K. Katkar; Abhishek C. Lokhande; Umakant M. Patil

doi:10.1016/j.electacta.2019.06.162

Hydrothermally synthesized Iron Phosphate Hydroxide thin film electrocatalyst for electrochemical water splitting

Suraj A. Khalate
, Sujit A. Kadam
, Yuan Ron Ma
, Sachin S. Pujari
, Supriya J. Marje
, Pranav K. Katkar
, Abhishek C. Lokhande
, Umakant M. Patil

Mechanical & Nuclear Engineering

Research output: Contribution to journal › Article › peer-review

30 Scopus citations

Abstract

Hydrogen production is an immediate need to replace the fossil fuels to keep environmental balance, and water splitting is an effective solution in presence of catalyst through oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). Herein, for the first time, we have synthesized Iron Phosphate Hydroxide (Fe_2.95(PO₄)₂(OH)₂) thin film electrode as a superior electrocatalyst by facile hydrothermal method using binder free approach. The crystallographic properties are studied from X-ray diffraction pattern, and Reitveld refinement analysis shows best fit with the tetragonal Lipscombite structure of Iron Phosphate Hydroxide (Fe_2.95(PO₄)₂(OH)₂). Flower like structure consist of agglomerated nanorods on micro and sub-micrometric spheres of Fe_2.95(PO₄)₂(OH)₂ exhibits lower overpotential of 281 mV at 10 mA/cm² current density towards OER in alkaline (1 M KOH) medium and maintains its activity after 12 h catalytic stability test. Moreover, prepared electrode shows HER with overpotential 165.7 mV at current density 10 mA/cm² in acidic (1 M H₃PO₄) medium and demonstrates enhanced performance (126.4 mV overpotential) after 12 h catalytic stability. The Fe_2.95(PO₄)₂(OH)₂ thin film electrodes show superior performance in OER and HER, compared with its oxide counterpart (Fe₂O₃).

Original language	British English
Pages (from-to)	118-128
Number of pages	11
Journal	Electrochimica Acta
Volume	319
DOIs	https://doi.org/10.1016/j.electacta.2019.06.162
State	Published - 1 Oct 2019

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SDG 7 Affordable and Clean Energy

Keywords

Electrochemistry
Heterogeneous catalysis
Hydrothermal synthesis
Ligand effects
Transition metals
Voltammetry

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10.1016/j.electacta.2019.06.162

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title = "Hydrothermally synthesized Iron Phosphate Hydroxide thin film electrocatalyst for electrochemical water splitting",

abstract = "Hydrogen production is an immediate need to replace the fossil fuels to keep environmental balance, and water splitting is an effective solution in presence of catalyst through oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). Herein, for the first time, we have synthesized Iron Phosphate Hydroxide (Fe2.95(PO4)2(OH)2) thin film electrode as a superior electrocatalyst by facile hydrothermal method using binder free approach. The crystallographic properties are studied from X-ray diffraction pattern, and Reitveld refinement analysis shows best fit with the tetragonal Lipscombite structure of Iron Phosphate Hydroxide (Fe2.95(PO4)2(OH)2). Flower like structure consist of agglomerated nanorods on micro and sub-micrometric spheres of Fe2.95(PO4)2(OH)2 exhibits lower overpotential of 281 mV at 10 mA/cm2 current density towards OER in alkaline (1 M KOH) medium and maintains its activity after 12 h catalytic stability test. Moreover, prepared electrode shows HER with overpotential 165.7 mV at current density 10 mA/cm2 in acidic (1 M H3PO4) medium and demonstrates enhanced performance (126.4 mV overpotential) after 12 h catalytic stability. The Fe2.95(PO4)2(OH)2 thin film electrodes show superior performance in OER and HER, compared with its oxide counterpart (Fe2O3).",

keywords = "Electrochemistry, Heterogeneous catalysis, Hydrothermal synthesis, Ligand effects, Transition metals, Voltammetry",

author = "Khalate, \{Suraj A.\} and Kadam, \{Sujit A.\} and Ma, \{Yuan Ron\} and Pujari, \{Sachin S.\} and Marje, \{Supriya J.\} and Katkar, \{Pranav K.\} and Lokhande, \{Abhishek C.\} and Patil, \{Umakant M.\}",

note = "Publisher Copyright: {\textcopyright} 2019 Elsevier Ltd",

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doi = "10.1016/j.electacta.2019.06.162",

language = "British English",

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T1 - Hydrothermally synthesized Iron Phosphate Hydroxide thin film electrocatalyst for electrochemical water splitting

AU - Khalate, Suraj A.

AU - Kadam, Sujit A.

AU - Ma, Yuan Ron

AU - Pujari, Sachin S.

AU - Marje, Supriya J.

AU - Katkar, Pranav K.

AU - Lokhande, Abhishek C.

AU - Patil, Umakant M.

PY - 2019/10/1

Y1 - 2019/10/1

N2 - Hydrogen production is an immediate need to replace the fossil fuels to keep environmental balance, and water splitting is an effective solution in presence of catalyst through oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). Herein, for the first time, we have synthesized Iron Phosphate Hydroxide (Fe2.95(PO4)2(OH)2) thin film electrode as a superior electrocatalyst by facile hydrothermal method using binder free approach. The crystallographic properties are studied from X-ray diffraction pattern, and Reitveld refinement analysis shows best fit with the tetragonal Lipscombite structure of Iron Phosphate Hydroxide (Fe2.95(PO4)2(OH)2). Flower like structure consist of agglomerated nanorods on micro and sub-micrometric spheres of Fe2.95(PO4)2(OH)2 exhibits lower overpotential of 281 mV at 10 mA/cm2 current density towards OER in alkaline (1 M KOH) medium and maintains its activity after 12 h catalytic stability test. Moreover, prepared electrode shows HER with overpotential 165.7 mV at current density 10 mA/cm2 in acidic (1 M H3PO4) medium and demonstrates enhanced performance (126.4 mV overpotential) after 12 h catalytic stability. The Fe2.95(PO4)2(OH)2 thin film electrodes show superior performance in OER and HER, compared with its oxide counterpart (Fe2O3).

AB - Hydrogen production is an immediate need to replace the fossil fuels to keep environmental balance, and water splitting is an effective solution in presence of catalyst through oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). Herein, for the first time, we have synthesized Iron Phosphate Hydroxide (Fe2.95(PO4)2(OH)2) thin film electrode as a superior electrocatalyst by facile hydrothermal method using binder free approach. The crystallographic properties are studied from X-ray diffraction pattern, and Reitveld refinement analysis shows best fit with the tetragonal Lipscombite structure of Iron Phosphate Hydroxide (Fe2.95(PO4)2(OH)2). Flower like structure consist of agglomerated nanorods on micro and sub-micrometric spheres of Fe2.95(PO4)2(OH)2 exhibits lower overpotential of 281 mV at 10 mA/cm2 current density towards OER in alkaline (1 M KOH) medium and maintains its activity after 12 h catalytic stability test. Moreover, prepared electrode shows HER with overpotential 165.7 mV at current density 10 mA/cm2 in acidic (1 M H3PO4) medium and demonstrates enhanced performance (126.4 mV overpotential) after 12 h catalytic stability. The Fe2.95(PO4)2(OH)2 thin film electrodes show superior performance in OER and HER, compared with its oxide counterpart (Fe2O3).

KW - Electrochemistry

KW - Heterogeneous catalysis

KW - Hydrothermal synthesis

KW - Ligand effects

KW - Transition metals

KW - Voltammetry

UR - https://www.scopus.com/pages/publications/85068229266

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DO - 10.1016/j.electacta.2019.06.162

M3 - Article

AN - SCOPUS:85068229266

SN - 0013-4686

VL - 319

SP - 118

EP - 128

JO - Electrochimica Acta

JF - Electrochimica Acta

ER -

Hydrothermally synthesized Iron Phosphate Hydroxide thin film electrocatalyst for electrochemical water splitting

Abstract

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Keywords

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