Pyrolyzed cobalt porphyrin-modified carbon nanomaterial as an active catalyst for electrocatalytic water oxidation. (1st June 2015)

• Record Type: Journal Article
• Authors: Sun, Zijun; Li, Jingshi; Zheng, Huafei; Liu, Xiang; Ye, Sheng; Du, Pingwu
• Is Part Of: International journal of hydrogen energy. Volume 40:Number 20(2015)
• Page Start: 6538
• Page End: 6545
• Publication Date: 2015-06-01
• Subjects: Noble-metal-free electrocatalyst -- Cobalt porphyrin -- Water oxidation -- Oxygen evolution reaction -- Water splitting; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2015.03.103
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Design and preparation of highly active catalysts for the oxygen evolution reaction (OER) is important to achieve efficient water splitting. Herein, we report on the use of pyrolyzed cobalt porphyrin/carbon materials as noble-metal-free electrocatalysts for the catalytic OER. The cobalt porphyrin/carbon electrocatalysts were prepared by loading a cobalt porphyrin complex on a carbon support, followed by heat treatment under argon atmosphere. Cyclic voltammetry showed that the maximum catalytic activity was obtained after heat treatment at 1000 °C. The turnover frequency was ∼0.078 s −1 based on cobalt under an applied anodic potential of 1.31 V (vs NHE) at pH = 9.2. The catalyst was further characterized by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and powder X-ray diffraction (XRD). These results indicate that the pyrolyzed cobalt porphyrin/carbon nanomaterial is a promising catalyst for OER. Graphical abstract: Pyrolyzed cobalt porphyrin/carbon materials as noble-metal-free electrocatalysts for the catalytic OER with high performance. Highlights: Noble-metal-free cobalt porphyrin-based catalyst for water oxidation. Carbon support improves catalytic current density. Heat-treatment enhances the catalytic activity. High Faradaic efficiency and turnover frequency.