Journal
CHEMICAL ENGINEERING JOURNAL
Volume 428, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2021.131219
Keywords
Hydrolysis; Ammonia borane; Graphene oxide; Metal phosphides; Nanobox
Categories
Funding
- National Key R&D Program of China [2020YFA0406103, 2020YFA0406104]
- National MCF Energy RD Program [2018YFE0306105]
- National Natural Science Foundation of China [U1932211, 51972216, 51725204, 21771132, 52041202]
- Innovative Research Group Project of the Na-tional Natural Science Foundation of China [51821002]
- Natural Science Foundation of Jiangsu Province [BK20190041, BK20190828]
- Guangdong Province Key Area RD Program [2019B010933001]
- Collaborative Innovation Center of Suzhou Nano Science Technology
- Priority Academic Program Development of Jiangsu Higher Educa-tion Institutions (PAPD)
- 111 Project
- Users with Excellence Program of Hefei Science Center CAS [2019HSC-UE002]
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By modulating the electronic structure of Co in the catalyst with a small amount of doped Ni, the hydrolysis activity can be significantly enhanced. The CoNiP/GO catalyst shows remarkable performance in the hydrolysis of Ammonia borane, with excellent TOF value and good durability.
Efficient and low-cost catalysts for the hydrolysis of Ammonia borane (AB) are highly required for the hydrogen economy. Here we report a highly efficient CoNiP nanobox on graphene oxide (GO) for the hydrolysis of AB. By modulating the electronic structure of Co in the catalyst with small amount of doped Ni (1.7 wt%), the hydrolysis activity can be significantly enhanced up to 4 times of the original activity. The CoNiP/GO catalyst can thus achieve a remarkable TOF value of 134.6 (H-2) mol/((Cat-metal)mol.min), which is one of the best values ever reported for noble metal-free catalysts. The catalyst also shows a low activation energy of 44.12 kJ/mol and a good durability of 84.6% after five cycles. Synchrotron radiation based X-ray absorption spectroscopy reveals that the high performance can be mainly attributed to the slightly modulated chemical state of Co, which is suitable for the hydrolysis reaction. The favorable nanobox morphology and GO support also contribute to the high performance.
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