Shi Yongbin, Xu Suxian, Li Fei
State Key Laboratory of Fine Chemicals, DUT-KTH Joint Education and Research Center on Molecular Devices, Dalian University of Technology, Dalian, 116024, China.
Chem Commun (Camb). 2022 Aug 2;58(62):8714-8717. doi: 10.1039/d2cc02261c.
Electrocatalytic nitrate reduction reaction (NitRR) is an energy-saving and environmentally benign approach to synthesizing ammonia under ambient conditions. However, the development of noble metal-free catalysts with high activity and selectivity is still a significant challenge. In this study, uniformly dispersed amorphous CoB nanoparticles supported on carbon paper were synthesized a simple wet chemical reduction method. As an efficient nitrate reduction electrocatalyst, CoB exhibited a maximum faradaic efficiency of 94.00 ± 1.67% and a yield rate of up to 0.787 ± 0.028 mmol h cm for ammonia production. The enhanced NitRR performance could be attributed to a partial electron transfer from B to Co, which is necessary for optimizing the adsorption energies of the reaction intermediates and facilitating electron transport. Thus, selective and cost-effective electroreduction of nitrates to ammonia can be achieved using CoB nanoparticles.
电催化硝酸盐还原反应（NitRR）是一种在环境条件下合成氨的节能且环境友好的方法。然而，开发具有高活性和选择性的无贵金属催化剂仍然是一项重大挑战。在本研究中，通过一种简单的湿化学还原方法合成了负载在碳纸上的均匀分散的非晶态CoB纳米颗粒。作为一种高效的硝酸盐还原电催化剂，CoB在氨生成方面表现出94.00±1.67%的最大法拉第效率和高达0.787±0.028 mmol h cm的产率。NitRR性能的增强可归因于从B到Co的部分电子转移，这对于优化反应中间体的吸附能和促进电子传输是必要的。因此，使用CoB纳米颗粒可以实现硝酸盐选择性且经济高效地电还原为氨。
