| AN Ran,WEI Lei,LI Yi-ying,GAO Jing.Effects of Electroplating Condition on Catalytic Activity of CoP Amorphous Plating[J],46(10):143-148 |
| Effects of Electroplating Condition on Catalytic Activity of CoP Amorphous Plating |
| Received:February 08, 2017 Revised:October 20, 2017 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2017.10.020 |
| KeyWord:CoP electroplating sodium borohydride hydrogen production orthogonal experiment |
| Author | Institution |
| AN Ran |
Building Materials Industry and Technical Supervision Research Center, Beijing , China |
| WEI Lei |
School of Chemistry and Material Science, Langfang Teachers University, Langfang , China |
| LI Yi-ying |
School of Chemistry and Material Science, Langfang Teachers University, Langfang , China |
| GAO Jing |
School of Chemistry and Material Science, Langfang Teachers University, Langfang , China |
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| Abstract: |
| The work aims to investigate influence rule of electroplating condition on catalytic performance of CoP plating for hydrogen generation from hydrolysis of sodium borohydride. CoP amorphous catalysts were deposited on copper sheet through electroplating, and used for hydrogen production from hydrolysis of sodium borohydride. Microstructure and element composition of the catalysts were characterized by using field-emission scanning electron microscope (FE-SEM) and energy dispersive spectroscopy (EDS), respectively. An orthogonal experiment was performed to investigate level of the influences of deposition time, deposition temperature and current density on catalyst activity. Meanwhile, the influences of NaBH4 concentration, reaction temperature and recycling on the catalyst performance were discussed. The results of FE-SEM and EDS indicated that the CoP coating was piled up with crystalline grain with a diameter of about 200 nm, and the atomic ratio of Co and P was 3.6:1. Orthogonal experiment results showed that the influence degree of these factors was in the following order: deposition time > temperature > current density. The prepared CoP catalyst exhibited the highest activity when the deposition temperature, time and current density was 20 ℃, 1 min and 5.56 A/dm2, respectively. Hydrogen generation rate was up to 2750 mL/(min•g) at 30 ℃ in the system of 6%NaBH4+2%NaOH, and apparent activation energy was 41.2 kJ/mol. After recycling for 4 times, the catalyst activity decreased by 64%. CoP/Cu catalysts exhibiting excellent activity in sodium borohydride hydrolysis are successfully prepared in the method of electroplating. Among different electroplating conditions, deposition time is the primary factor, followed by deposition temperature and current density. |
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