Zhang Wuxiang, Zhang Hao, Luo Rui, Zhang Ming, Yan Xin, Sun Xiuyun, Shen Jinyou, Han Weiqing, Wang Lianjun, Li Jiansheng
Key Laboratory of Jiangsu Province for Chemical Pollution Control and Resources Reuse, School of Environment and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
Key Laboratory of Jiangsu Province for Chemical Pollution Control and Resources Reuse, School of Environment and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
J Colloid Interface Sci. 2019 Jul 15;548:48-55. doi: 10.1016/j.jcis.2019.04.029. Epub 2019 Apr 9.
The efficient and durable catalysts toward electrochemical water-splitting plays significant role in clean and renewable energy storage applications. Herein, we design the Prussian blue analogues precursor by self-assembled strategy and converted it to (Fe-Co)Se composite by post-selenization method. Benefiting of unique porous morphology, high electrochemically active surface area and fast electron transfer ability, the excellent oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) performance of (Fe-Co)Se catalyst were obtained. It was revealed that only require overpotentials of 251 mV to arrive a current density of 10 mA cm in OER system, and 90 mV was accomplished at a current density of 10 mA cm toward the HER activity, along with low Tafel slope of 47.6 and 58.7 mV dec was achieved for OER and HER, respectively. The (Fe-Co)Se catalysts with high electrochemical activity at the same time long-time durability may encourage more practical catalytic applications for renewable energy technologies.
高效耐用的电化学水分解催化剂在清洁和可再生能源存储应用中起着重要作用。在此，我们通过自组装策略设计普鲁士蓝类似物前驱体，并通过后硒化方法将其转化为(Fe-Co)Se复合材料。得益于独特的多孔形态、高电化学活性表面积和快速的电子转移能力，(Fe-Co)Se催化剂表现出优异的析氧反应（OER）和析氢反应（HER）性能。结果表明，在OER体系中，达到10 mA cm电流密度仅需251 mV的过电位，在HER活性方面，在10 mA cm电流密度下实现了90 mV的过电位，同时OER和HER的塔菲尔斜率分别低至47.6和58.7 mV dec。具有高电化学活性且同时具备长期耐久性的(Fe-Co)Se催化剂可能会推动可再生能源技术在更多实际催化应用中的发展。
