Polyaniline coated copper for hydrogen storage and evolution in alkaline medium
| Autor: | S. Harinipriya, Samanwita Pal, V. Sudha, S. Padmapriya, Deepak Kumar, Bhawna Chaubey |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Hydrogen Renewable Energy Sustainability and the Environment Inorganic chemistry Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Electrochemistry 01 natural sciences Copper 0104 chemical sciences Solvent Hydrogen storage chemistry.chemical_compound Fuel Technology chemistry Polyaniline Proton NMR Cyclic voltammetry 0210 nano-technology |
| Zdroj: | International Journal of Hydrogen Energy. 42:20453-20462 |
| ISSN: | 0360-3199 |
| DOI: | 10.1016/j.ijhydene.2017.06.204 |
| Popis: | Emeraldine Hydrochloride salt is coated on copper substrate and studied for hydrogen storage and hydrogen evolution reaction in 1 M NaOH. Phenomenological thermodynamic approach demonstrated elsewhere in conjunction with the cyclic voltammetry data is employed to calculate the solvent modified work function for polyaniline coated copper in alkaline medium as −0.65 eV. The solvated work function is in satisfactory agreement with the band gap difference of π−π* transition in emeraldine base and π- polaron transition in emeraldine salt ca −0.6 eV as reported in the literature. 13 C and 1 H NMR studies revealed that polyaniline undergoes switching between emeraldine salt and emeraldine base, before and after hydrogen evolution respectively. The volume of hydrogen evolved on polyaniline coated copper is 1.64 times than that on copper as demonstrated by Gas chromatography. Thus emeraldine salt, when stored in NaOH act as hydrogen storage medium and upon electrochemical perturbation can release hydrogen at controlled rate depending on the scan rate employed. |
| Databáze: | OpenAIRE |
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