Liao Jinyun, Li Yuanzhong, Tian Jingjing, Feng Yufa, Liu Quanbing, Li Hao
School of Chemistry and Materials Engineering, Huizhou University, Huizhou 516007, China; Guangzhou Key Laboratory of Clean Transportation Energy Chemistry, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China.
School of Chemistry and Materials Engineering, Huizhou University, Huizhou 516007, China.
J Colloid Interface Sci. 2025 Feb 15;680(Pt A):78-87. doi: 10.1016/j.jcis.2024.10.177. Epub 2024 Oct 28.
Catalytic methanolysis of ammonia borane is an integrated hydrogen production/storage technology with bright prospects, while its wide application is impeded by the high-cost of catalysts. In this work, hollow core@shell structured (HCSS) CoO@CuO-NiO with a size of 300-500 nm and a shell thickness of ca. 100 nm has been designed for ammonia borane (NHBH) methanolysis for rapid hydrogen release. The possible formation mechanism of HCSS-CoO@CuO-NiO is proposed based on a series of characterization results, which is crucial for the design and preparation of nanocatalysts with similar architectures. Benefiting from the optimized compositions and electronic structures, the best HCSS-CoO@CuO-NiO sample exhibits high catalytic activity in NHBH methanolysis with a turnover frequency of 67.1 min, surpassing that of all the noble-metal-free catalysts in previous reports. A possible reaction mechanism of NHBH methanolysis is put forward based on the in-situ Fourier transform infrared spectrometer (FTIR) characterization and kinetic isotope effect (KIE) experimental results. This work supplies a novel avenue for developing cheap and robust catalysts towards NHBH methanolysis by tailoring the catalysts' morphology to hollow core@shell structures.
