Journal
CATALYSIS SCIENCE & TECHNOLOGY
Volume 7, Issue 21, Pages 5128-5135Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7cy01742a
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Funding
- National Natural Science Foundation of China [U1432249, 21203130, U1732110]
- Soochow University-Western University Centre for Synchrotron Radiation Research
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- Fund for Innovative Research Teams of Jiangsu Higher Education Institutions
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Oxidized Pt-Ni nanoparticles were deposited on N-doped graphene oxide (NGO) for the hydrolysis of ammonia borane (AB). The optimized Pt3Ni7O-NGO sample shows a high total turnover frequency (TOF) value of 709.6 mol H-2 per mol Cat-Pt per min in the hydrolysis of AB, which is one of the best values for Pt-based catalysts to date. Moreover, when calculating all metal contents (mainly Ni, Pt : Ni = 1 : 5) in the hybrid, the total TOF value is still as high as 120.7 mol H-2 per mol Cat-metal per min, better than that of pure Pt/C or Pt on NGO. The hybrid also exhibits a good stability with more than 76% activity (TOF = 544.9) after 9 cycles. Synchrotron radiation X-ray absorption spectroscopy reveals that Pt and Ni in the catalyst exhibit a strong interaction through oxygen bonds and the bimetallic structure shows further interaction with the support material. All the components in the hybrid can thus be connected to show a synergetic effect for enhanced catalytic performance. The excellent performance can be related to the unique electronic structure of the hybrid with the synergetic effect, which may also shed light on the design of high-efficiency catalysts for other energy-related applications.
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