离子束溅射制备Pt/C催化电极材料的结构和电化学性能

Structure and Electrochemical Properties of Pt/C Catalytical Electrodes Manufactured by Ion Beam Sputtering

采用离子束溅射技术制备Ｐｔ／Ｃ催化电极（Ｐｔ层厚度为１００ｎｍ），降低了电极耗铂量至０１９ｍｇ／ｃｍ２，电极具有良好的电化学性能。研究了在不同碳质载体材料上用不同沉积条件制备的Ｐｔ／Ｃ电极的电化学性能。结果表明石墨纤维布上沉积铂的电极性能优于碳纸上沉积铂的电极；采用高束电压高束电流情况下沉积的铂电极电化学性能又有显著提高。电极连续运转１０００ｈ后催化活性未出现下降。

The Pt/C catalytical electrodes(the thickness of Pt layers is 100nm)were prepared by ion beam sputtering method. The consumption of Pt in Pt/C electrodes is reduced to 0.19mg/cm 2.The crystal structure and the electrochemical properties of Pt/C electrodes made under different deposition conditions and on different substrates were studied.It was found that the Pt films in Pt/C electrodes possess fcc structure,and that the catalytical activity of Pt films deposited on the graphite cloths is better than that of Pt films on the carbon papers.Application of high beam voltages and high beam current during ion beam sputtering can improve the catalytical activity of Pt/C electrode further,and the catalytical activity of Pt/C electrode have not degraded after worked 1000 h.