CUED Publications database

Self-assembled two-dimensional copper oxide nanosheet bundles as an efficient oxygen evolution reaction (OER) electrocatalyst for water splitting applications

Pawar, SM and Pawar, BS and Hou, B and Kim, J and Aqueel Ahmed, AT and Chavan, HS and Jo, Y and Cho, S and Inamdar, AI and Gunjakar, JL and Kim, H and Cha, S and Im, H (2017) Self-assembled two-dimensional copper oxide nanosheet bundles as an efficient oxygen evolution reaction (OER) electrocatalyst for water splitting applications. Journal of Materials Chemistry A, 5. pp. 12747-12751. ISSN 2050-7488

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Abstract

A high activity of a two-dimensional (2D) copper oxide (CuO) electrocatalyst for the oxygen evolution reaction (OER) is presented. The CuO electrode self-assembles on a stainless steel substrate via chemical bath deposition at 80 °C in a mixed solution of CuSO and NH OH, followed by air annealing treatment, and shows a 2D nanosheet bundle-type morphology. The OER performance is studied in a 1 M KOH solution. The OER starts to occur at about 1.48 V versus the RHE (η = 250 mV) with a Tafel slope of 59 mV dec in a 1 M KOH solution. The overpotential (η) of 350 mV at 10 mA cm is among the lowest compared with other copper-based materials. The catalyst can deliver a stable current density of >10 mA cm for more than 10 hours. This superior OER activity is due to its adequately exposed OER-favorable 2D morphology and the optimized electronic properties resulting from the thermal treatment. 4 4 -1 -2 -2

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div B > Solid State Electronics and Nanoscale Science
Depositing User: Cron Job
Date Deposited: 11 Apr 2019 01:25
Last Modified: 12 Apr 2021 20:33
DOI: 10.1039/c7ta02835k