Abdulkadir B A, Jalil A A, Cheng C K, Setiabudi H D
Centre for Research in Advanced Fluid & Processes, Universiti Malaysia Pahang Al-Sultan Abdullah, Lebuh Persiaran Tun Khalil Yaakob, 26300, Gambang, Pahang, Malaysia.
School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310 UTM, Johor Bahru, Johor, Malaysia.
Chem Asian J. 2024 Jan 15;19(2):e202300833. doi: 10.1002/asia.202300833. Epub 2023 Dec 7.
Hydrogen plays a crucial role in the future energy landscape owing to its high energy density. However, finding an ideal storage material is the key challenge to the success of the hydrogen economy. Various solid-state hydrogen storage materials, such as metal hydrides, have been developed to realize safe, effective, and compact hydrogen storage. However, low kinetics and thermodynamic stability lead to a high working temperature and a low hydrogen sorption rate of the metal hydrides. Using scaffolds made from porous materials like silica to confine the metal hydrides is necessary for better and improved hydrogen storage. Therefore, this article reviews porous silica-based scaffolds as an ideal material for improved hydrogen storage. The outcome showed that confining the metal hydrides using scaffolds based on porous silica significantly increases their storage capacities. It was also found that the structural modifications of the silica-based scaffold into a hollow structure further improved the storage capacity and increased the affinity and confinement ability of the metal hydrides, which prevents the agglomeration of metal particles during the adsorption/desorption process. Hence, the structural modifications of the silica material into a fibrous and hollow material are recommended to be crucial for further enhancing the metal hydride storage capacity.
由于氢具有高能量密度，它在未来能源格局中起着至关重要的作用。然而，找到一种理想的储存材料是氢经济成功的关键挑战。已经开发了各种固态储氢材料，如金属氢化物，以实现安全、有效和紧凑的储氢。然而，低动力学和热力学稳定性导致金属氢化物的工作温度高且氢吸附速率低。使用由二氧化硅等多孔材料制成的支架来限制金属氢化物对于更好地改进储氢是必要的。因此，本文综述了基于多孔二氧化硅的支架作为改进储氢的理想材料。结果表明，使用基于多孔二氧化硅的支架限制金属氢化物可显著提高其储存容量。还发现，将基于二氧化硅的支架结构改性为中空结构进一步提高了储存容量，并增加了金属氢化物的亲和力和限制能力，这在吸附/解吸过程中防止了金属颗粒的团聚。因此，建议将二氧化硅材料结构改性为纤维状和中空材料对于进一步提高金属氢化物储存容量至关重要。
