Porosity and thickness effect of Pd–Cu–Si metallic glasses on electrocatalytic hydrogen production and storage
This contribution places emphasis on tuning pore architecture and film thickness of mesoporous Pd–Cu–Si thin films sputtered on Si/SiO2 substrates for enhanced electrocatalytic and hydrogen sorption/desorption activity and their comparison with the state-of-the-art thin film electrocatalysts. Small...
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| Format: | Article |
| Language: | English |
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Elsevier
2021-11-01
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| Series: | Materials & Design |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127521006547 |
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| author | B. Sarac T. Karazehir E. Yüce M. Mühlbacher A.S. Sarac J. Eckert |
| author_facet | B. Sarac T. Karazehir E. Yüce M. Mühlbacher A.S. Sarac J. Eckert |
| author_sort | B. Sarac |
| collection | DOAJ |
| description | This contribution places emphasis on tuning pore architecture and film thickness of mesoporous Pd–Cu–Si thin films sputtered on Si/SiO2 substrates for enhanced electrocatalytic and hydrogen sorption/desorption activity and their comparison with the state-of-the-art thin film electrocatalysts. Small Tafel slope of 43 mV dec–1 for 1250 nm thick coating on 2 µm diameter pores with 4.2 µm interspacing electrocatalyst with comparable hydrogen overpotentials to the literature suggests its use for standard fuel cells. The largest hydrogen sorption has been attained for the 250 nm thick electrocatalyst on 5 µm pore diameter with 12 µm interspacing (2189 µC cm−2 per CV cycle), making it possible for rapid storage systems. Moreover, the charge transfer resistance described by an equivalent circuit model has an excellent correlation with Tafel slopes. Along with its very low Tafel slope of 42 mV dec–1 10 nm thick electrocatalyst on 2 µm diameter pores with 4.2 µm interspacing has the highest capacitive response of ∼ 0.001 S sn cm−2 and is promising to be used as a nano-charger and hydrogen sensor. The findings of Si/SiO2 supported mesoporous Pd-based metallic glass (MG) assemblies suggest a similar design applicability for crystalline systems and other MG types. |
| first_indexed | 2024-12-17T20:04:10Z |
| format | Article |
| id | doaj.art-5d034652c0db41b4a36699b9a023df83 |
| institution | Directory Open Access Journal |
| issn | 0264-1275 |
| language | English |
| last_indexed | 2024-12-17T20:04:10Z |
| publishDate | 2021-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj.art-5d034652c0db41b4a36699b9a023df832022-12-21T21:34:22ZengElsevierMaterials & Design0264-12752021-11-01210110099Porosity and thickness effect of Pd–Cu–Si metallic glasses on electrocatalytic hydrogen production and storageB. Sarac0T. Karazehir1E. Yüce2M. Mühlbacher3A.S. Sarac4J. Eckert5Erich Schmid Institute of Materials Science, Austrian Academy of Sciences, 8700 Leoben, Austria; Corresponding author.Department of Energy System Engineering, Adana Alparslan Türkeş Science and Technology University, 01250 Saricam, Adana, TurkeyErich Schmid Institute of Materials Science, Austrian Academy of Sciences, 8700 Leoben, Austria; Department of Materials Science, Chair of Materials Physics, Montanuniversität Leoben, 8700 Leoben, AustriaDepartment of Materials Science, Chair of Materials Physics, Montanuniversität Leoben, 8700 Leoben, AustriaPolymer Science and Technology, Istanbul Technical University, 34469 Istanbul, TurkeyErich Schmid Institute of Materials Science, Austrian Academy of Sciences, 8700 Leoben, Austria; Department of Materials Science, Chair of Materials Physics, Montanuniversität Leoben, 8700 Leoben, AustriaThis contribution places emphasis on tuning pore architecture and film thickness of mesoporous Pd–Cu–Si thin films sputtered on Si/SiO2 substrates for enhanced electrocatalytic and hydrogen sorption/desorption activity and their comparison with the state-of-the-art thin film electrocatalysts. Small Tafel slope of 43 mV dec–1 for 1250 nm thick coating on 2 µm diameter pores with 4.2 µm interspacing electrocatalyst with comparable hydrogen overpotentials to the literature suggests its use for standard fuel cells. The largest hydrogen sorption has been attained for the 250 nm thick electrocatalyst on 5 µm pore diameter with 12 µm interspacing (2189 µC cm−2 per CV cycle), making it possible for rapid storage systems. Moreover, the charge transfer resistance described by an equivalent circuit model has an excellent correlation with Tafel slopes. Along with its very low Tafel slope of 42 mV dec–1 10 nm thick electrocatalyst on 2 µm diameter pores with 4.2 µm interspacing has the highest capacitive response of ∼ 0.001 S sn cm−2 and is promising to be used as a nano-charger and hydrogen sensor. The findings of Si/SiO2 supported mesoporous Pd-based metallic glass (MG) assemblies suggest a similar design applicability for crystalline systems and other MG types.http://www.sciencedirect.com/science/article/pii/S0264127521006547Metallic glassThin filmHydrogen evolution reactionPolarizationHydrogen storageElectrochemical circuit modeling |
| spellingShingle | B. Sarac T. Karazehir E. Yüce M. Mühlbacher A.S. Sarac J. Eckert Porosity and thickness effect of Pd–Cu–Si metallic glasses on electrocatalytic hydrogen production and storage Materials & Design Metallic glass Thin film Hydrogen evolution reaction Polarization Hydrogen storage Electrochemical circuit modeling |
| title | Porosity and thickness effect of Pd–Cu–Si metallic glasses on electrocatalytic hydrogen production and storage |
| title_full | Porosity and thickness effect of Pd–Cu–Si metallic glasses on electrocatalytic hydrogen production and storage |
| title_fullStr | Porosity and thickness effect of Pd–Cu–Si metallic glasses on electrocatalytic hydrogen production and storage |
| title_full_unstemmed | Porosity and thickness effect of Pd–Cu–Si metallic glasses on electrocatalytic hydrogen production and storage |
| title_short | Porosity and thickness effect of Pd–Cu–Si metallic glasses on electrocatalytic hydrogen production and storage |
| title_sort | porosity and thickness effect of pd cu si metallic glasses on electrocatalytic hydrogen production and storage |
| topic | Metallic glass Thin film Hydrogen evolution reaction Polarization Hydrogen storage Electrochemical circuit modeling |
| url | http://www.sciencedirect.com/science/article/pii/S0264127521006547 |
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