Efficient Hydrolysis of Sodium Borohydride by Co‐B Supported on Nitrogen‐doped Carbon. Issue 22 (9th June 2020)

• Record Type: Journal Article
• Authors: Xu, Jianan; Du, Xuexun; Wei, Qinglian; Huang, Yongmin
• Is Part Of: ChemistrySelect. Volume 5:Issue 22(2020)
• Page Start: 6683
• Page End: 6690
• Publication Date: 2020-06-09
• Subjects: heterogeneous catalysis -- hydrolysis -- nitrogen-doped carbon -- catalytic activity; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/slct.201904818
• Languages: English
• ISSNs: 2365-6549

Abstract

Abstract: In this work, dehydrogenation of NaBH4 in alkaline solutions was catalyzed by amorphous Co‐B catalysts supported on nitrogen doped carbon (N‐C) that is rarely utilized in this field. The physicochemical properties of the as‐prepared catalysts were characterized by X‐ray Diffraction (XRD), Field Emission Scanning Electron Microscopy (FESEM), High Resolution Transmission Electron Microscopy (HRTEM), X‐ray Photoelectron Spectroscopy (XPS), Raman Spectroscopy and BET (Brunner−Emmet−Teller) measurements. Among all the catalysts made in this paper, Co‐B/N‐C‐700 exhibited best activity, which is likely to be attributed to the possession of more metal Co as active sites. The hydrogen generation rate (HGR) reached 2649 ml H2 min −1 g −1 cat in 10 wt. % NaOH + 10 wt. % NaBH4 solution at 30 °C. The value of activation energy is 37.57 kJ mol −1 and compares favorably with values of some previous reports. Besides, influences of NaOH concentration, NaBH4 concentration, temperature, recycle times and amount of catalyst for the catalytic performance of Co‐B/N‐C‐700 were also investigated to reflect more on hydrolysis of sodium borohydride. Abstract : Insert text for Table of Contents here. (Nitrogen‐doped carbon (N‐C‐T) was utilized as support to load Co‐B to form efficient catalysts (Co‐B/N‐C‐T). The best catalyst Co‐B/N‐C‐700 exhibited remarkable hydrogen generation rate with 2649 ml H2 min −1 g −1 cat and the activation energy was 37.57 kJ/mol, which is comparable to many noble metal catalysts. The reason why it presented best performance may be attributed to the more possession of Co 0 as active sites.)