Design and fabrication of Fe2O3/FeP heterostructure for oxygen evolution reaction electrocatalysis

Ahmad, Iqbal ¹Ahmed, Jawad ²Batool, Saima ³Zafar, Muhammad Nadeem ⁴Hanif, Amna ⁵Zahidullah ²Nazar, Muhammad Faizan ⁶Ul-Hamid, Anwar ⁷Jabeen, Uzma ⁸Dahshan, Alaa ⁹Idrees, Muhammad ³Shehzadi, Syeda Aalia¹⁰

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作者信息

1. Xi An Jiao Tong Univ
2. Allama Iqbal Open Univ
3. Shenzhen Univ
4. Univ Gujrat
5. Quaid I Azam Univ
6. Univ Educ
7. King Fand Univ Petr & Minerals
8. Sardar Bahadur Khan Womens Univ
9. King Khalid Univ
10. Int Islamic Univ
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Abstract

The production of an inexpensive, highly active electrocatalyst for a simple oxygen evolution reaction (OER) based on earth-abundant transition metals is still a major challenge. In addition, the ambiguity of the water splitting reaction (hydrogen evolution and OER) is a hurdle in the manufacture of suitable catalysts for the efficient water electrolysis process. Here, the synthesis of iron oxide/iron phosphide (Fe2O3/FeP) heterostructure and its counterparts Fe2O3 and FeP as cheap electrocatalysts for water electrolysis is presented. Characterization techniques such as powder X-ray diffraction (XRD), scanning electron microscopy (SEM) and Fourier transform infrared (FTIR) spectroscopy were used to analyze the structure of these electrocatalysts. Heterostructure Fe2O3/FeP has been shown to be a more active electrocatalyst than its counterparts. It initiates OER at a remarkably low potential of 1.49 V vs. reverse hydrogen electrode (RHE). For this electrocatalyst, a current density of 10 mA/cm(2) is achieved at an overpotential of 264 mV for OER in 1.0 M potassium hydroxide solution and the value of the Tafel slope is 47 mV dec(-1), outperforming its complements (Fe2O3 and FeP) under similar conditions. The results obtained are superior to those of previously reported Fe-based OER electrocatalysts. The Fe2O3/FeP electrocatalyst has proven its long-term stability by driving OER at 1.65 V (vs. RHE) for about 12.5 h. (C) 2021 Elsevier B.V. All rights reserved.

Key words

Electrocatalysis/Oxygen evolution reaction/Iron oxide/iron phosphide/Fe2O3/FeP/Heterostructure/TRANSPORT PROPERTIES/EFFICIENT/CARBON/ANODE/PHOSPHIDES/CATALYSTS/HYDROGEN/SPINEL/ND3+

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出版年

2022

Journal of Alloys and Compounds

EISCI

ISSN：0925-8388

被引量49

参考文献量48

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