Visible-light-enhanced catalytic hydrolysis of ammonia borane using RuP2 quantum dots supported by graphitic carbon nitride |
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Authors: | Lei Wei Yumei Yang Ya-Na Yu Xiaomeng Wang Hongyan Liu Yanhong Lu Maixia Ma Yu Chen |
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Affiliation: | College of Chemistry and Materials Science, Langfang Normal University, Langfang, 065000, PR China |
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Abstract: | Hydrolytic dehydrogenation of ammonia borane (AB) driven by efficient catalysts has attracted considerable attention and is regarded as a promising strategy for hydrogen generation. Herein, RuP2 quantum dots supported on graphitic carbon nitride (g-C3N4) were successfully prepared by in-situ phosphorization, yielding a highly efficient photocatalyst toward AB hydrolysis. The catalysts were characterized by field-emission scanning electron microscopy, transmission electron microscopy, x-ray diffraction, x-ray photoelectron microscopy, inductively coupled plasma atomic emission spectroscopy, UV–visible diffuse reflectance spectroscopy and photoluminescence spectroscopy. A conventional water-displacement method was employed to record the hydrogen volume as a function of reaction time. Owing to visible-light irradiation, the initial turnover frequency of the AB hydrolysis was significantly enhanced by 110% (i.e., 134 min?1) at room temperature. Furthermore, the apparent activation energy decreased from 67.7 ± 0.9 to 47.6 ± 1.0 kJ mol?1. The photocatalytic hydrolysis mechanism and catalyst reusability were also investigated. |
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Keywords: | Hydrogen generation Photocatalytic hydrolysis Ammonia borane Graphite carbon nitride In-situ phosphorization |
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