کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1278544 | 1497560 | 2012 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: A comparison of cathodes for zero gap alkaline water electrolysers for hydrogen production A comparison of cathodes for zero gap alkaline water electrolysers for hydrogen production](/preview/png/1278544.png)
Selected coatings on nickel or stainless steel micromeshes have been examined as electrocatalysts for hydrogen evolution in conditions mimicking those found in zero gap alkaline water electrolysers. Voltammetry in 4 M NaOH at a temperature of 333 K, shows that Pt, NiMo and RuO2 are the coatings of choice giving a superior performance particularly at higher current densities. NiMo and RuO2 coatings also give stable performance during a 10 day electrolysis in a laboratory, zero gap, alkaline water electrolysis cell with a hydroxide conducting membrane; when combined with a NiFe(OH)2 coated anode, a current density of 1 A cm−2 is achieved with a cell voltage of ∼2.1 V. Pt catalyses H2 evolution efficiently at short times of electrolysis but cells with a Pt cathode show an increase in cell voltage from 2.05 V to 2.23 V during the first two days of operation.
► NiMo and RuO2 coatings are superior electrocatalysts for hydrogen evolution.
► 1 A cm−2 is achieved with a zero-gap cell voltage of ∼2.1 V with these coatings.
► NiMo and RuO2 coatings give stable performance for 10-day electrolysis.
Journal: International Journal of Hydrogen Energy - Volume 37, Issue 9, May 2012, Pages 7429–7435