| Effects of electroless deposition conditions on the hydrogen generation kinetics of Co-Fe-P catalysts via hydrolysis of ammonia borane solution |
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ChangMyeon Lee, SeKwon Oh |
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Industrial component R&D Department, Korea Institute of Industrial Technology |
Correspondence:
SeKwon Oh,
Email: sk0514@kitech.re.kr
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Received: 29 April 2025 • Accepted: 9 June 2025 |
| Abstract |
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This study investigates the fabrication and optimization of Co-Fe-P catalysts on Cu foam using electroless deposition, focusing on their hydrogen generation efficiency. Deposition times were varied from 1 to 10 minutes, resulting in spherical Co-Fe-P particles growing from sub-micron to several microns in size. The optimal hydrogen generation rate of 27.66 ml/min was achieved with a 5-minute deposition. Extending the deposition to 10 minutes led to particle aggregation, reducing the efficiency per unit weight. The impact of bath temperatures from 30°C to 60°C was also assessed, with temperatures of 50°C and above promoting the development of larger 3D structures and increasing Fe and P contents (~9.3 wt.% and 10 wt.%). This enhanced hydrogen generation, peaking again at 27.66 ml/min. NaOH concentrations were varied from 0.5 M to 0.9 M, showing that concentrations over 0.8 M improved catalyst morphology and performance, increasing hydrogen generation to 10.03 ml/min. Among substrates tested, Co-Fe-P on Cu foam demonstrated the highest hydrogen generation rate due to better catalyst distribution and surface area. The study underscores the importance of deposition conditions and substrate choice in optimizing Co-Fe-P catalysts for hydrogen generation. |
| Keywords:
Cobalt-iron-phosphorus, Electroless deposition, Hydrogen evolution, Ammonia borane, Catalyst |
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