High-efficiency borohydride oxidation and oxygen reduction on titanium-supported Au(NiMo) catalysts for Alkaline fuel cells
In this research, we used a straightforward and cost-effective methodology to fabricate a three-dimensional nickel-molybdenum (NiMo) thin-layer coating, sparsely decorated with gold crystallites, on a titanium substrate (denoted as Au(NiMo)/Ti). The catalysts were prepared by depositing NiMo onto a...
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Elsevier
2025-06-01
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| Series: | Chemical Physics Impact |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2667022425000155 |
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| author | Sukomol Barua Aldona Balčiūnaitė Jūratė Vaičiūnienė Loreta Tamašauskaitė-Tamašiūnaitė Eugenijus Norkus |
| author_facet | Sukomol Barua Aldona Balčiūnaitė Jūratė Vaičiūnienė Loreta Tamašauskaitė-Tamašiūnaitė Eugenijus Norkus |
| author_sort | Sukomol Barua |
| collection | DOAJ |
| description | In this research, we used a straightforward and cost-effective methodology to fabricate a three-dimensional nickel-molybdenum (NiMo) thin-layer coating, sparsely decorated with gold crystallites, on a titanium substrate (denoted as Au(NiMo)/Ti). The catalysts were prepared by depositing NiMo onto a Ti surface through a simple electrochemical deposition technique involving a dynamic hydrogen bubble template, followed by gold crystallite decoration via galvanic displacement. The prepared NiMo/Ti and Au(NiMo)/Ti catalysts were investigated as promising potential materials for alkaline fuel cells. The Au(NiMo)/Ti-3 catalyst with an Au:Ni:Mo molar ratio of 1:52.5:2.4 exhibited significantly higher electrocatalytic activity toward the oxidation of sodium borohydride and the reduction of oxygen compared to the NiMo/Ti with a Mo:Ni molar ratio of 1:7.8 to 1:24.3, and Au(NiMo)/Ti-2 and Au(NiMo)/Ti-1 catalysts with Au:Ni:Mo molar ratios of 1:50.1:5.5 and 1:51.2:7.5, respectively. Direct alkaline NaBH₄-H₂O₂ single fuel cell tests were conducted using the prepared NiMo/Ti-3 with Mo:Ni molar ratio of 1:24.3 and Au(NiMo)/Ti-3 catalysts as the anode materials. The investigation revealed that the peak power density of up to 162 mW cm⁻² was attained at 25°C with a current density of 202 mA cm⁻² and a cell voltage of 0.8 V, when Au(NiMo)/Ti-3 was employed as the anode catalyst. The highest Au mass-specific peak power density of 42.9 kW g⁻¹ was obtained at 55°C. The Au(NiMo)/Ti-3 catalyst demonstrated significantly higher activity and greater stability than the NiMo/Ti-3 catalyst. Overall, the NiMo/Ti and Au(NiMo)/Ti catalysts are promising materials for use as anodes in direct sodium borohydride fuel cells. |
| format | Article |
| id | doaj-art-de2834e5d5614075b5b621f0ccf088b0 |
| institution | Kabale University |
| issn | 2667-0224 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Chemical Physics Impact |
| spelling | doaj-art-de2834e5d5614075b5b621f0ccf088b02025-01-19T06:26:51ZengElsevierChemical Physics Impact2667-02242025-06-0110100827High-efficiency borohydride oxidation and oxygen reduction on titanium-supported Au(NiMo) catalysts for Alkaline fuel cellsSukomol Barua0Aldona Balčiūnaitė1Jūratė Vaičiūnienė2Loreta Tamašauskaitė-Tamašiūnaitė3Eugenijus Norkus4Department of Catalysis, Center for Physical Sciences and Technology (FTMC), LT-10257 Vilnius, LithuaniaCorresponding author.; Department of Catalysis, Center for Physical Sciences and Technology (FTMC), LT-10257 Vilnius, LithuaniaDepartment of Catalysis, Center for Physical Sciences and Technology (FTMC), LT-10257 Vilnius, LithuaniaDepartment of Catalysis, Center for Physical Sciences and Technology (FTMC), LT-10257 Vilnius, LithuaniaDepartment of Catalysis, Center for Physical Sciences and Technology (FTMC), LT-10257 Vilnius, LithuaniaIn this research, we used a straightforward and cost-effective methodology to fabricate a three-dimensional nickel-molybdenum (NiMo) thin-layer coating, sparsely decorated with gold crystallites, on a titanium substrate (denoted as Au(NiMo)/Ti). The catalysts were prepared by depositing NiMo onto a Ti surface through a simple electrochemical deposition technique involving a dynamic hydrogen bubble template, followed by gold crystallite decoration via galvanic displacement. The prepared NiMo/Ti and Au(NiMo)/Ti catalysts were investigated as promising potential materials for alkaline fuel cells. The Au(NiMo)/Ti-3 catalyst with an Au:Ni:Mo molar ratio of 1:52.5:2.4 exhibited significantly higher electrocatalytic activity toward the oxidation of sodium borohydride and the reduction of oxygen compared to the NiMo/Ti with a Mo:Ni molar ratio of 1:7.8 to 1:24.3, and Au(NiMo)/Ti-2 and Au(NiMo)/Ti-1 catalysts with Au:Ni:Mo molar ratios of 1:50.1:5.5 and 1:51.2:7.5, respectively. Direct alkaline NaBH₄-H₂O₂ single fuel cell tests were conducted using the prepared NiMo/Ti-3 with Mo:Ni molar ratio of 1:24.3 and Au(NiMo)/Ti-3 catalysts as the anode materials. The investigation revealed that the peak power density of up to 162 mW cm⁻² was attained at 25°C with a current density of 202 mA cm⁻² and a cell voltage of 0.8 V, when Au(NiMo)/Ti-3 was employed as the anode catalyst. The highest Au mass-specific peak power density of 42.9 kW g⁻¹ was obtained at 55°C. The Au(NiMo)/Ti-3 catalyst demonstrated significantly higher activity and greater stability than the NiMo/Ti-3 catalyst. Overall, the NiMo/Ti and Au(NiMo)/Ti catalysts are promising materials for use as anodes in direct sodium borohydride fuel cells.http://www.sciencedirect.com/science/article/pii/S2667022425000155GoldNickel-molybdenum catalystBorohydride oxidationOxygen reduction reactionFuel cells |
| spellingShingle | Sukomol Barua Aldona Balčiūnaitė Jūratė Vaičiūnienė Loreta Tamašauskaitė-Tamašiūnaitė Eugenijus Norkus High-efficiency borohydride oxidation and oxygen reduction on titanium-supported Au(NiMo) catalysts for Alkaline fuel cells Chemical Physics Impact Gold Nickel-molybdenum catalyst Borohydride oxidation Oxygen reduction reaction Fuel cells |
| title | High-efficiency borohydride oxidation and oxygen reduction on titanium-supported Au(NiMo) catalysts for Alkaline fuel cells |
| title_full | High-efficiency borohydride oxidation and oxygen reduction on titanium-supported Au(NiMo) catalysts for Alkaline fuel cells |
| title_fullStr | High-efficiency borohydride oxidation and oxygen reduction on titanium-supported Au(NiMo) catalysts for Alkaline fuel cells |
| title_full_unstemmed | High-efficiency borohydride oxidation and oxygen reduction on titanium-supported Au(NiMo) catalysts for Alkaline fuel cells |
| title_short | High-efficiency borohydride oxidation and oxygen reduction on titanium-supported Au(NiMo) catalysts for Alkaline fuel cells |
| title_sort | high efficiency borohydride oxidation and oxygen reduction on titanium supported au nimo catalysts for alkaline fuel cells |
| topic | Gold Nickel-molybdenum catalyst Borohydride oxidation Oxygen reduction reaction Fuel cells |
| url | http://www.sciencedirect.com/science/article/pii/S2667022425000155 |
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