A Metal-Free Covalent Organic Polymer for Electrocatalytic Hydrogen Evolution
| Autor: | Santimoy Khilari, Anirban Pradhan, Asim Bhaumik, Rabindra Nath Manna, Sujan Mondal, Bidhan Chandra Patra, Debabrata Pradhan |
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| Rok vydání: | 2017 |
| Předmět: |
chemistry.chemical_classification
Tafel equation Inorganic chemistry 02 engineering and technology General Chemistry Polymer Overpotential 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Porphyrin Catalysis 0104 chemical sciences chemistry.chemical_compound chemistry Covalent bond Density functional theory 0210 nano-technology Faraday efficiency |
| Zdroj: | ACS Catalysis. 7:6120-6127 |
| ISSN: | 2155-5435 |
| Popis: | Metal-free catalysis for electrocatalytic hydrogen evolution from water is very demanding for the production of sustainable and clean fuel. Herein, we report the synthesis of a porphyrin-based metal-free covalent organic polymer (TpPAM) through a simple condensation between triformyl phloroglucinol (Tp) and 5,10,15,20-tetra(4-aminophenyl)-21H,23H-porphyrin (PAM). The as-prepared porous TpPAM exhibited superior activity for the hydrogen evolution reaction (HER) current density of 10 mA cm–2 at a low overpotential of 250 mV and a small Tafel slope of 106 mV decade–1, which are better than those of related metal-free electrocatalysts. The high HER activity of TpPAM was investigated in-depth via theoretical density functional theory (DFT) calculations. The theoretical findings were correlated with the experimental results, and these were in good agreement for high HER catalytic efficiency of the porous TpPAM polymer. The Faradaic efficiency of the TpPAM-based electrode was found to be 98%, which is very close... |
| Databáze: | OpenAIRE |
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