2 存在的问题实际工业化电解水生产中，析氢阴极必须在高温、高碱浓度、高

2 存在的问题<br>实际工业化电解水生产中，析氢阴极必须在高温、高碱浓度、高电流密度等条件下长期并间歇性工作。因此，除了考虑其催化析氢性能外，还要保证电极材料其他性能，让电极能安全的工作。目前，工业生产更多出于稳定性方面的考虑，仍以铁和镀Ni阴极为主，单位氢气的能耗约为4.5～5.5kWh/m3。电流密度为150mA/cm2时，析氢过电位达到300mV以上，极大增加了生产能耗。同时，析氢电极的实验室研究普遍存在重视催化活性等直接性能指标，而忽视稳定性、安全性等长期间接性能指标的问题[31]。这种极端化只以一种性能评价电极优劣的评价体系是不准确的，其他性能的好坏一样会限制电极的使用

2 Problems<br>In the actual industrial electrolytic water production, hydrogen cathode must work intermittently for a long time under high temperature, high alkali concentration and high current density. Therefore, in addition to considering its catalytic hydrogen analysis properties, but also to ensure the electrode material other properties, so that the electrode can safely work. At present, industrial production is more for stability considerations, still iron and niyin is extremely main, the energy consumption per unit of hydrogen is about 4.5 to 5.5 kWh/m3. When the current density is 150mA/cm2, the hydrogen over-incantate reaches more than 300mV, greatly increasing the energy consumption of production. At the same time, the laboratory research of hydrogen analysis electrodes generally attaches great importance to direct performance indicators such as catalytic activity, while ignoring the problem of long-term indirect performance indicators such as stability and safety. This extreme evaluation system of electrode advantages and disadvantages is not accurate with one performance evaluation system, other performance will limit the use of electrodes.

2 existing problems<br>In the actual industrial production of electrolyzed water, the hydrogen evolution cathode must work intermittently under the conditions of high temperature, high alkali concentration and high current density. Therefore, in addition to its catalytic hydrogen evolution performance, it is necessary to ensure other properties of electrode materials, so that the electrode can work safely. At present, due to the consideration of stability, industrial production is still dominated by iron and Ni plated cathodes, and the energy consumption per unit hydrogen is about 4.5-5.5kwh/m3. When the current density is 150mA / cm2, the over potential of hydrogen evolution is over 300mV, which greatly increases the production energy consumption. At the same time, the laboratory research of hydrogen evolution electrode generally pays attention to the direct performance indexes such as catalytic activity, but ignores the long-term indirect performance indexes such as stability and safety [31]. It is not accurate to use only one performance evaluation system to evaluate the electrode's advantages and disadvantages. The use of electrode will be limited by other performance<br>