Synthesis of a Novel Co-B/CTAB Catalyst via Solid-state-reaction at Room Temperature for Hydrolysis of Ammonia-borane
- PDF / 985,414 Bytes
- 8 Pages / 595.32 x 841.92 pts (A4) Page_size
- 13 Downloads / 217 Views
doi: 10.1007/s40242-020-0209-9
Article
Synthesis of a Novel Co-B/CTAB Catalyst via Solid-state-reaction at Room Temperature for Hydrolysis of Ammonia-borane HU Haibin1, LONG Bo1,2,3, JIANG Yifan1, SUN Shichang1, Ibrahim LAWAN1, ZHOU Weiming1,3, ZHANG Mingxin1, WANG Liwei4*, ZHANG Fan5* and YUAN Zhanhui1* 1. College of Materials Engineering, Fujian Agriculture and Forestry University, Fuzhou 350002, P. R. China; 2. College of Mechanical and Electrical Engineering, Fujian Agriculture and Forestry University, Fuzhou 350002, P. R. China; 3. Key Laboratory of National Forestry & Grassland Bureau for Plant Fiber Functional Materials, Fujian Agriculture and Forestry University, Fuzhou 350002, P. R. China; 4. Ocean College, Minjiang University, Fuzhou 350108, P. R. China; 5. School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China Abstract Cobalt-boride(Co-B) is emerging as one of the promising materials in the base-hydrolytic dehydrogenation of ammonia-borane(AB). In order to avoid the low specific area and poor catalytic capacity of Co-B catalyst caused by aggregation arising from the strong reducing property and rapid reaction condensation of sodium borohydride(NaBH4), novel cobalt boride/cetyltrimethylammonium bromide(Co-B/CTAB) catalyst was obtained via solidstate grinding at room temperature, and the catalyst was further characterized by XRD, SEM, XPS and BET. The hydrogen generation rate(HGR) was then determined by the hydrolysis reaction of AB. The SEM images indicate that a lot of irregular folds and curled edges are formed on the sample with a maximum surface area of 145.57 m 2/g, thus possibly resulting in the high hydrogen production(HGR was 10.68 L·min –1·g–1), which may be attributed to CTAB that provide favorable large specific surface area and abundant porous structure. Additionally, catalyst will not be affected by solvants during solid-state reaction. As a diluent, the surfactant CTAB hindered the reaction rate of sodium borohydride reduction to cobalt boride and obtained the novel catalyst with a large specific surface area. Keywords Hydrogen generation rate; Ammonia borane; Co-B; Solid-state reaction
1
Introduction
With the increasingly prominent energy demands and environmental issues, clean and sustainable energy has become a research hotspot[1,2]. As a kind of clean energy, hydrogen energy has been paid much attention by researchers[3,4], which can be produced by water, biomass, and its affiliated chemical products, such as fossil fuel[5,6]. And borohydride(ammoniaborane, hydrazine-borane and sodium borohydride, etc.) plays an important role in the base-hydrolytic dehydrogenation. Among these borohydride, ammonia-borane(AB) has been considered as a promising option because of its higher hydrogen contents(19.6%, mass ratio), high solubility(336 g/L in water), and appreciable stability at room temperature[7,8]. Normally, the stored hydrogen of NH3BH3 is released by a hydrolysis reaction[9,10].
NH3BH3(s)+2H2O(l) ←→ NH4BO2(l)+3H2(g)
(1)
Theoretical
Data Loading...
