Title: | CuxCo1-xO Nanoparticles on Graphene Oxide as A Synergistic Catalyst for High-Efficiency Hydrolysis of Ammonia-Borane |
Authors: | Kun Feng, Jun Zhong,* Binhua Zhao, Hui Zhang, Lai Xu, Xuhui Sun,* and Shuit-Tong Lee* |
Institutions: | Institute of Functional Nano and Soft Materials Laboratory (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou 215123 (China) |
Abstract: | Ammonia-borane (AB) is an excellent material for chemical storage of hydrogen. However, the practical utilization of AB for production of hydrogen is hindered by the need of expensive noble metal-based catalysts. Here, we report CuxCo1-xO nanoparticles (NPs) facilely deposited on graphene oxide (GO) as a low-cost and high-performance catalyst for the hydrolysis of AB. This hybrid catalyst exhibits an initial total turnover frequency (TOF) value of 70.0 (H2) mol/(Cat-metal) mol·min, which is the highest TOF ever reported for noble metal-free catalysts, and a good stability keeping 94% activity after 5 cycles. Synchrotron radiation-based X-ray absorption spectroscopy (XAS) nvestigations suggested that the high catalytic performance could be attributed to the interfacial interaction between CuxCo1-xO NPs and GO. Moreover, the catalytic hydrolysis mechanism was studied by in situ XAS experiments for the first time, which reveal a significant water adsorption on the catalyst and clearly confirm the interaction between AB and the catalyst during hydrolysis. |
IF: | 11.709 |
Link: | http://onlinelibrary.wiley.com/doi/10.1002/anie.201604021/full Editor: Danting Xiang |