Pt loading to promote hydrogen evolution from ammonia-borane hydrolysis of Ni2P under visible light

被引:12
作者
Asim, Muhammad [1 ,2 ]
Zhang, Shuguang [1 ,2 ]
Maryam, Bushra [3 ]
Xiao, Jie [1 ,2 ]
Shi, Chengxiang [1 ,2 ]
Pan, Lun [1 ,2 ]
Zou, Ji-Jun [1 ,2 ]
机构
[1] Tianjin Univ, Sch Chem Engn & Technol, Key Lab Green Chem Technol, Minist Educ, Tianjin 300072, Peoples R China
[2] Haihe Lab Sustainable Chem Transformat, Tianjin 300192, Peoples R China
[3] Tianjin Univ, Sch Environm Sci & Engn, Tianjin 300072, Peoples R China
关键词
Pt@Ni2P; Ammonia borane hydrolysis; H2; evolution; Visible light irradiation; NEAREST-NEIGHBOR CONTRIBUTIONS; HIGHLY EFFICIENT; CATALYTIC HYDROLYSIS; METAL NANOPARTICLES; BINDING-ENERGY; COBALT FERRITE; H-2; EVOLUTION; QUANTUM DOTS; GENERATION; DEHYDROGENATION;
D O I
10.1016/j.apsusc.2023.156787
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Ammonia borane is a promising hydrogen storage material that can be handled easily and release hydrogen at room temperature in the presence of a catalyst. Attaching noble metal to transition metal phosphide is needed to improve the dehydrogenation from ammonia borane. Here, a catalyst Pt@Ni2P is reported to enhance the hydrogen evolution rate in dark and visible light. The incorporation of Pt with Ni2P exhibit partially positive Pt delta+ and partially negative Ni2P delta-as manifested by X-ray photoelectron spectrum, which serve as active sites for ammonia borane and water, respectively. Moreover, visible light irradiation further accelerates the electron transfer from Pt delta+ to Ni2P delta-as exhibited by electrochemical impedance spectroscopy and transient photocurrent spectra. Subsequently, Pt loading over Ni2P plays a vital role in improving H2 evolution rate via ammonia borane hydrolysis. With the incorporation of 2% Pt, the hydrogen generation rate from ammonia borane hydrolysis is increased by 4.0-fold in dark, and visible light irradiation further increases the activity by 5.7-fold compared with pristine Ni2P. The visible light enhances the turn-off frequency from 4.7 min-1 to 10.3 min-1 and reduces the activation energy from 52.0 kJ center dot mole- 1 to 43.4 kJ center dot mole- 1 compared with dark. The performance of Pt@Ni2P is also outstanding compared with reported catalysts and is expected to be used economically in practical applications.
引用
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页数:12
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