Metal hydride mediated water splitting: Electrical energy saving and decoupled H-2/O-2 generation
Metal hydride mediated water splitting: Electrical energy saving and decoupled H-2/O-2 generation
复制标题
金属氢化物介导的水分解：节能和解耦 H-2/O-2 生成
DOI：
10.1016/j.mattod.2021.02.019
复制
发表时间：
2021
期刊：
影响因子：
24.2
通讯作者：
Xingguo Li
中科院分区：
文献类型：
--
作者：
Jun Chen;Rui Xiao;Kai Fu;Yong Wu;Yanru Guo;Shaolei Yang;Haiwen Li;Jie Zheng;Xingguo Li
Reversible hydrogen absorption/desorption, the very fundamental property of metal hydrides (MHs), can be utilized to innovate the water splitting process. Spontaneous hydrogen absorption by a MH electrode shifts the water reduction potential to 0.3 V above the reversible hydrogen electrode. Then, the absorbed hydrogen can be released to give H2by thermal dehydrogenation at mild temperature below 70 °C by utilizing low grade heat. The MH mediated water splitting combines the electrochemical hydrogen absorption in Ni-MH batteries and the thermal dehydrogenation in gas phase hydrogen storage, which significantly reduces the electrical energy consumption for water splitting up to 25 kJ (mol H2)−1compared to an ideal hydrogen evolution catalyst and also automatically leads to decoupled H2/O2generation. The advantages and mechanisms of the MH mediated water splitting are demonstrated by MH electrodes with surface Pd coating.
