Synthesis of a novel Co–B/CuNWs/CTAB catalyst via chemical reaction at room temperature for hydrolysis of ammonia-borane

Jia Chen, Bo Long, Haibin Hu, Ziqing Zhong, Ibrahim Lawa, Fan Zhang, Liwei Wang, Zhanhui Yuan

Abstract

Co–B has good catalytic activity in the hydrogenation reaction of unsaturated groups and has been widely studied and applied. Co–B catalysts were usually prepared by reducing cobalt salts with reducing agents. However, the high surface energy and magnetic properties of Co–B catalysts made the particles easily agglomerate. Then, agglomeration increased the particle size of the sample and reduced the effective surface area of the catalyst powder, which limited the catalytic activity of the Co–B catalysts. A new type of Co–B/copper nanowires/cetyl trimethyl ammonium bromide (Co–B/CuNWs/CTAB) catalyst with high catalytic activity was prepared by a chemical reduction in this work. The performance of Co–B/CuNWs/CTAB was studied in the hydrolysis of ammonia-borane (AB) and CuNWs inserted into the Co–B interlayer could avoid particle agglomeration, thereby effectively increasing the specific surface areas of the catalysts. Furthermore, the insertion of CuNWs facilitated the transportation of electrons and improved catalytic activity. The BET analysis shows that the maximum surface area of the sample is 148.9 m²/g. Meanwhile, the hydrogen generation rate of 13.46 L min⁻¹·g⁻¹ at 30 °C was obtained by using the synthesized Co–B/CuNWs/CTAB catalyst with a low activation energy of 8.771 kJ mol⁻¹.

Keywords

Ammonia-borane, Copper nanowires, Catalyst, Hydrogen generation rate

DOI: https://doi.org/10.1016/j.ijhydene.2021.10.255

Adsorption Link: https://www.sciencedirect.com/science/article/pii/S0360319921043652?via%3Dihub

22-IJHE-Synthesis of a novel Co–B_CuNWs_CTAB catalyst via chemical reaction at room temperature for hydrolysis of ammonia-borane.pdf