Chang Zhenjun, Jia Fuxing, Ji Xingyu, Li Qian, Cui Jingren, Liao Zhengzheng, Sun Xiaoling
College of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China.
Polytex Engineering Group, Yizheng 225000, China.
Molecules. 2024 Dec 20;29(24):6025. doi: 10.3390/molecules29246025.
As a sustainable alternative technology to the cost- and energy-intensive Haber-Bosch method, electrochemical nitrogen (N) reduction offers direct conversion of N to NH under ambient conditions. Direct use of noble metals or non-noble metals as electrocatalytic materials results in unsatisfactory electrocatalytic properties because of their low electrical conductivity and stability. Herein, three-dimensional flexible carbon nanofiber (CNF/TiO@CoS) nanostructures were prepared on the surface of CNF by using electrospinning, a hydrothermal method, and in situ growth. We investigated the behavior of CNFs/TiO@CoS as an electrocatalytic material in 0.1 M sodium sulfate. The highest ammonia yield of the material was 4.61 × 10 mol s cm at -0.45 V vs. RHE, and the highest Faraday efficiency, as well as superior long-term durability, was 8.3% at -0.45 V vs. RHE. This study demonstrates the potential of firecracker-shaped nanofiber templates for loading varied noble metals or non-noble metals as a novel development of hybrid composites for electrocatalytic nitrogen reduction.
作为一种替代成本高且能源密集的哈伯-博施法的可持续技术，电化学氮还原可在环境条件下将氮直接转化为氨。直接使用贵金属或非贵金属作为电催化材料，由于其低电导率和稳定性，导致电催化性能不尽人意。在此，通过静电纺丝、水热法和原位生长在碳纳米纤维表面制备了三维柔性碳纳米纤维（CNF/TiO@CoS）纳米结构。我们研究了CNFs/TiO@CoS作为电催化材料在0.1 M硫酸钠中的行为。该材料在相对于可逆氢电极（RHE）为-0.45 V时的最高氨产率为4.61×10⁻¹¹ mol s⁻¹ cm⁻²，在相对于RHE为-0.45 V时的最高法拉第效率以及卓越的长期耐久性为8.3%。本研究证明了鞭炮状纳米纤维模板作为一种用于负载各种贵金属或非贵金属的新型混合复合材料用于电催化氮还原的潜力。
