Nanostructured manganese oxide on fullerene soot for water oxidation under neutral conditions. (1st May 2023)

• Record Type: Journal Article
• Authors: Salimi, Saeideh; Akbari, Nader; Zand, Zahra; Hołyńska, Małgorzata; Aleshkevych, Pavlo; Allakhverdiev, Suleyman I.; Najafpour, Mohammad Mahdi
• Is Part Of: International journal of hydrogen energy. Volume 48:Number 38(2023)
• Page Start: 14199
• Page End: 14209
• Publication Date: 2023-05-01
• Subjects: Artificial photosynthesis -- Fullerene soot -- Hydrogen -- Manganese oxide -- Oxygen -- Water-oxidation reaction; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2022.12.236
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: The sluggish kinetics of oxygen-evolution reaction (OER) through water-oxidation reaction results in high overpotentials for water splitting. Among different compounds, carbon-based material/Mn oxide composites were reported as OER catalysts. Fullerene soot (FS), which contains a mixture of fullerenes and carbon blacks, is low-cost compared to fullerenes and is commercially available. Herein, the Mn oxide/fullerene soot (MnOx /FS) composite was investigated as an OER catalyst under neutral conditions. The composite was prepared through the reaction of KMnO4 and FS as a facile, easy, and low-cost procedure. In this method, amorphous Mn oxide is formed directly on FS. The material was characterized by a number of methods. Then, the OER catalytic activity of MnOx /FS was studied in a LiClO4 solution (pH ≈ 6.3). Compared to pristine FS, the OER activity of MnOx /FS is 2.5 times higher at 2.25 V vs. RHE. The Tafel slopes for OER are 450 and 240 mV per decade for FS and the reported composite, respectively. Graphical abstract: Image 1 A simple strategy to synthesize Mn oxide/fullerene soot as a catalyst for the oxygen-evolution reaction through water-oxidation reaction under neutral conditions is reported. Highlights: An Mn oxide/fullerene soot (FS) composite was prepared through the reaction of KMnO4 and FS. The composite was introduced as a promising catalyst for water-oxidation reaction. In the composite, fullerene soot acts as conductive support, and MnOx acts as a catalyst.