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Title: Selenium-doped copper oxide nanoarrays: Robust electrocatalyst for the oxygen evolution reaction with ultralow overpotential

Abstract

The oxygen evolution reaction (OER) is the key anodic reaction in electrochemical water splitting. OER is a four-electron process with sluggish reaction kinetics. RuO2 and IrO2 are the benchmark catalysts for OER. Thus, finding a low-cost, earth-abundant, and stable electrocatalyst for OER is a big challenge. Here in this work, we report OER over Se-CuO/CF nanoarrays with an ultralow overpotential of 440 mV (at 50 mA/cm2 current density). Se-CuO/CF nanoarray has a TOF of 0.05 s-1 at 300 mV. The catalyst showed consistent OER performance upto1000 cycles run over a period of 10 h. The OER performance of Se-CuO/CF nanoarrays was compared with RuO2/CF catalyst and the overpotential for RuO2/CF nanoarray was only 10 mV lower than Se-CuO/CF 50 mA/cm2 current density. Se-CuO/CF nanoarray showed 50 mV lower overpotential than the state of the art RuO2/CF catalyst at a current density of 100 mA/cm2. The Tafel slope of Se-CuO/CF is 21 mV/decade lower compared to RuO2/CF suggesting faster reaction kinetics of Se-CuO/CF. The electrochemical surface area and the conductivity were increased upon doping Se into CuO/CF nanoarrays which can be attributed to enhanced OER performance of the Se-CuO/CF nanoarrays.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1]
  1. University of Connecticut, Storrs, CT (United States)
Publication Date:
Research Org.:
Univ. of Connecticut, Storrs, CT (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division (CSGB)
OSTI Identifier:
1976858
Grant/Contract Number:  
FG02-86ER13622
Resource Type:
Accepted Manuscript
Journal Name:
Applied Materials Today
Additional Journal Information:
Journal Volume: 27; Journal Issue: C; Journal ID: ISSN 2352-9407
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; nanoarrays; electrochemical water splitting; selenium doped-copper oxide; nanoarray; oxygen evolution reaction

Citation Formats

Tabassum, Lamya, Tasnim, Habiba, Shubhashish, Shubhashish, Perera, Inosh, Bhosale, Tejas, Li, Meilin, March, Seth, Islam, Mohammad Khairul, and Suib, Steven L. Selenium-doped copper oxide nanoarrays: Robust electrocatalyst for the oxygen evolution reaction with ultralow overpotential. United States: N. p., 2022. Web. doi:10.1016/j.apmt.2022.101485.
Tabassum, Lamya, Tasnim, Habiba, Shubhashish, Shubhashish, Perera, Inosh, Bhosale, Tejas, Li, Meilin, March, Seth, Islam, Mohammad Khairul, & Suib, Steven L. Selenium-doped copper oxide nanoarrays: Robust electrocatalyst for the oxygen evolution reaction with ultralow overpotential. United States. https://doi.org/10.1016/j.apmt.2022.101485
Tabassum, Lamya, Tasnim, Habiba, Shubhashish, Shubhashish, Perera, Inosh, Bhosale, Tejas, Li, Meilin, March, Seth, Islam, Mohammad Khairul, and Suib, Steven L. Mon . "Selenium-doped copper oxide nanoarrays: Robust electrocatalyst for the oxygen evolution reaction with ultralow overpotential". United States. https://doi.org/10.1016/j.apmt.2022.101485. https://www.osti.gov/servlets/purl/1976858.
@article{osti_1976858,
title = {Selenium-doped copper oxide nanoarrays: Robust electrocatalyst for the oxygen evolution reaction with ultralow overpotential},
author = {Tabassum, Lamya and Tasnim, Habiba and Shubhashish, Shubhashish and Perera, Inosh and Bhosale, Tejas and Li, Meilin and March, Seth and Islam, Mohammad Khairul and Suib, Steven L.},
abstractNote = {The oxygen evolution reaction (OER) is the key anodic reaction in electrochemical water splitting. OER is a four-electron process with sluggish reaction kinetics. RuO2 and IrO2 are the benchmark catalysts for OER. Thus, finding a low-cost, earth-abundant, and stable electrocatalyst for OER is a big challenge. Here in this work, we report OER over Se-CuO/CF nanoarrays with an ultralow overpotential of 440 mV (at 50 mA/cm2 current density). Se-CuO/CF nanoarray has a TOF of 0.05 s-1 at 300 mV. The catalyst showed consistent OER performance upto1000 cycles run over a period of 10 h. The OER performance of Se-CuO/CF nanoarrays was compared with RuO2/CF catalyst and the overpotential for RuO2/CF nanoarray was only 10 mV lower than Se-CuO/CF 50 mA/cm2 current density. Se-CuO/CF nanoarray showed 50 mV lower overpotential than the state of the art RuO2/CF catalyst at a current density of 100 mA/cm2. The Tafel slope of Se-CuO/CF is 21 mV/decade lower compared to RuO2/CF suggesting faster reaction kinetics of Se-CuO/CF. The electrochemical surface area and the conductivity were increased upon doping Se into CuO/CF nanoarrays which can be attributed to enhanced OER performance of the Se-CuO/CF nanoarrays.},
doi = {10.1016/j.apmt.2022.101485},
journal = {Applied Materials Today},
number = C,
volume = 27,
place = {United States},
year = {Mon Apr 25 00:00:00 EDT 2022},
month = {Mon Apr 25 00:00:00 EDT 2022}
}

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