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
复制标题
DOI：
10.1016/j.ijhydene.2012.02.013
复制
发表时间：
2012-05
影响因子：
7.2
通讯作者：
D. Pletcher;Xiaohong Li;Shaopeng Wang
中科院分区：
文献类型：
--
作者：
D. Pletcher;Xiaohong Li;Shaopeng Wang
镍或不锈钢微网上的选定涂层已被检查作为析氢的电催化剂，在模拟零间隙碱性水电解槽中发现的条件。在4 M氢氧化钠溶液中，333 K的温度下的伏安法表明，Pt、NiMo和RuO 2是选择的涂层，特别是在较高的电流密度下，具有上级性能。NiMo和RuO 2涂层在实验室中的10天电解过程中也提供了稳定的性能，零间隙，碱性水电解槽与氢氧化物导电膜;当与NiFe（OH）2涂层阳极结合时，电流密度为1Acm− 2，电池电压为2.1V。Pt在短时间内有效地催化H2析出，但具有Pt阴极的电池在操作的前两天期间显示出电池电压从2.05V增加到2.23V。
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 4M NaOH at a temperature of 333K, shows that Pt, NiMo and RuO2are the coatings of choice giving a superior performance particularly at higher current densities. NiMo and RuO2coatings 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)2coated anode, a current density of 1Acm−2is achieved with a cell voltage of ∼2.1V. Pt catalyses H2evolution efficiently at short times of electrolysis but cells with a Pt cathode show an increase in cell voltage from 2.05V to 2.23V during the first two days of operation.