Bu Yiting, Liu Jiaxi, Chu Hailiang, Wei Sheng, Yin Qingqing, Kang Li, Luo Xiaoshuang, Sun Lixian, Xu Fen, Huang Pengru, Rosei Federico, Pimerzin Aleskey A, Seifert Hans Juergen, Du Yong, Wang Jianchuan
Guangxi Key Laboratory of Information Materials and Guangxi Collaborative Innovation Center of Structure and Property for New Energy and Materials, School of Material Science & Engineering, Guilin University of Electronic Technology, Guilin 541004, China.
School of Mechanical & Electrical Engineering, Guilin University of Electronic Technology, Guilin 541004, China.
Nanomaterials (Basel). 2021 Nov 30;11(12):3259. doi: 10.3390/nano11123259.
As a promising hydrogen storage material, sodium borohydride (NaBH) exhibits superior stability in alkaline solutions and delivers 10.8 wt.% theoretical hydrogen storage capacity. Nevertheless, its hydrolysis reaction at room temperature must be activated and accelerated by adding an effective catalyst. In this study, we synthesize Co nanoparticles supported on bagasse-derived porous carbon (Co@xPC) for catalytic hydrolytic dehydrogenation of NaBH. According to the experimental results, Co nanoparticles with uniform particle size and high dispersion are successfully supported on porous carbon to achieve a Co@150PC catalyst. It exhibits particularly high activity of hydrogen generation with the optimal hydrogen production rate of 11086.4 mL∙min∙g and low activation energy () of 31.25 kJ mol. The calculation results based on density functional theory (DFT) indicate that the Co@xPC structure is conducive to the dissociation of [BH], which effectively enhances the hydrolysis efficiency of NaBH. Moreover, Co@150PC presents an excellent durability, retaining 72.0% of the initial catalyst activity after 15 cycling tests. Moreover, we also explored the degradation mechanism of catalyst performance.
作为一种很有前景的储氢材料，硼氢化钠（NaBH）在碱性溶液中表现出优异的稳定性，理论储氢容量达10.8 wt.%。然而，其在室温下的水解反应必须通过添加有效催化剂来激活和加速。在本研究中，我们合成了负载在甘蔗渣衍生多孔碳上的钴纳米颗粒（Co@xPC）用于催化硼氢化钠水解脱氢。根据实验结果，粒径均匀且高度分散的钴纳米颗粒成功负载在多孔碳上，得到Co@150PC催化剂。它表现出特别高的产氢活性，最佳产氢速率为11086.4 mL∙min∙g，活化能（）低至31.25 kJ mol。基于密度泛函理论（DFT）的计算结果表明，Co@xPC结构有利于[BH]的解离，有效提高了硼氢化钠的水解效率。此外，Co@150PC具有出色的耐久性，在15次循环测试后仍保留72.0%的初始催化剂活性。此外，我们还探究了催化剂性能的降解机制。
