Silver-Cobalt bimetallic nanoparticles to the generation of hydrogen from formic acid decomposition
The fabrication of cost effective heterogeneous catalysts for the release of hydrogen from hydrogen storage materials is the key technological challenge to the fuel-cell based hydrogen economy. Ag-Co bimetallic NPs were fabricated by using sodium dodecyl sulphate (SDS) and sodium borohydride as stab...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2022-05-01
|
| Series: | Arabian Journal of Chemistry |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1878535222001113 |
| _version_ | 1811291460222320640 |
|---|---|
| author | Elham Shafik Aazam Zoya Zaheer |
| author_facet | Elham Shafik Aazam Zoya Zaheer |
| author_sort | Elham Shafik Aazam |
| collection | DOAJ |
| description | The fabrication of cost effective heterogeneous catalysts for the release of hydrogen from hydrogen storage materials is the key technological challenge to the fuel-cell based hydrogen economy. Ag-Co bimetallic NPs were fabricated by using sodium dodecyl sulphate (SDS) and sodium borohydride as stabilizing and reducing agents, respectively. Catalytic activity of SDS-Ag-Co was higher than that of SDS free Ag-Co and monometallic (Ag and Co) due to the electron interactions and synergistic effect between the Ag and Co. Ag10-Co90 exhibited the superior catalytic activity, with rate constant of 5.2 × 10−4 s−1 at 303 K, activation energy of 46 kJ/mol, activation enthalpy of 44 kJ/mol, activation entropy of −165 J/K/mol, and turn over frequency of 240 h−1. The hydrogen generation rate increased and decreased with in increasing temperature, molar concentration of formic acid, presence of sodium formate, and pH, respectively. The kinetic rate equation can be stated as: rate = -d[formic acid]/dt = kobs[formic acid]0.99[Ag50Co50]0.98, kobs = 2.48 × 107 exp (−5637.96/RT). |
| first_indexed | 2024-04-13T04:29:45Z |
| format | Article |
| id | doaj.art-8c369e5a66954667a5cbb0d5301d3171 |
| institution | Directory Open Access Journal |
| issn | 1878-5352 |
| language | English |
| last_indexed | 2024-04-13T04:29:45Z |
| publishDate | 2022-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Arabian Journal of Chemistry |
| spelling | doaj.art-8c369e5a66954667a5cbb0d5301d31712022-12-22T03:02:23ZengElsevierArabian Journal of Chemistry1878-53522022-05-01155103795Silver-Cobalt bimetallic nanoparticles to the generation of hydrogen from formic acid decompositionElham Shafik Aazam0Zoya Zaheer1Department of Chemistry, Faculty of Science, P. O. Box 80203, King Abdulaziz University, Jeddah 21589, Saudi ArabiaCorresponding author.; Department of Chemistry, Faculty of Science, P. O. Box 80203, King Abdulaziz University, Jeddah 21589, Saudi ArabiaThe fabrication of cost effective heterogeneous catalysts for the release of hydrogen from hydrogen storage materials is the key technological challenge to the fuel-cell based hydrogen economy. Ag-Co bimetallic NPs were fabricated by using sodium dodecyl sulphate (SDS) and sodium borohydride as stabilizing and reducing agents, respectively. Catalytic activity of SDS-Ag-Co was higher than that of SDS free Ag-Co and monometallic (Ag and Co) due to the electron interactions and synergistic effect between the Ag and Co. Ag10-Co90 exhibited the superior catalytic activity, with rate constant of 5.2 × 10−4 s−1 at 303 K, activation energy of 46 kJ/mol, activation enthalpy of 44 kJ/mol, activation entropy of −165 J/K/mol, and turn over frequency of 240 h−1. The hydrogen generation rate increased and decreased with in increasing temperature, molar concentration of formic acid, presence of sodium formate, and pH, respectively. The kinetic rate equation can be stated as: rate = -d[formic acid]/dt = kobs[formic acid]0.99[Ag50Co50]0.98, kobs = 2.48 × 107 exp (−5637.96/RT).http://www.sciencedirect.com/science/article/pii/S1878535222001113Hydrogen generationBimetallicAg-CoFormic acid |
| spellingShingle | Elham Shafik Aazam Zoya Zaheer Silver-Cobalt bimetallic nanoparticles to the generation of hydrogen from formic acid decomposition Arabian Journal of Chemistry Hydrogen generation Bimetallic Ag-Co Formic acid |
| title | Silver-Cobalt bimetallic nanoparticles to the generation of hydrogen from formic acid decomposition |
| title_full | Silver-Cobalt bimetallic nanoparticles to the generation of hydrogen from formic acid decomposition |
| title_fullStr | Silver-Cobalt bimetallic nanoparticles to the generation of hydrogen from formic acid decomposition |
| title_full_unstemmed | Silver-Cobalt bimetallic nanoparticles to the generation of hydrogen from formic acid decomposition |
| title_short | Silver-Cobalt bimetallic nanoparticles to the generation of hydrogen from formic acid decomposition |
| title_sort | silver cobalt bimetallic nanoparticles to the generation of hydrogen from formic acid decomposition |
| topic | Hydrogen generation Bimetallic Ag-Co Formic acid |
| url | http://www.sciencedirect.com/science/article/pii/S1878535222001113 |
| work_keys_str_mv | AT elhamshafikaazam silvercobaltbimetallicnanoparticlestothegenerationofhydrogenfromformicaciddecomposition AT zoyazaheer silvercobaltbimetallicnanoparticlestothegenerationofhydrogenfromformicaciddecomposition |