Platinum nanoparticles deposited nitrogen-doped carbon nanofiber derived from bacterial cellulose for hydrogen evolution reaction. (22nd March 2018)

• Record Type: Journal Article
• Authors: Zhang, Ya; Tan, Jing; Wen, Fangfang; Zhou, Zhifeng; Zhu, Ming; Yin, Shixue; Wang, Honggui
• Is Part Of: International journal of hydrogen energy. Volume 43:Number 12(2018)
• Page Start: 6167
• Page End: 6176
• Publication Date: 2018-03-22
• Subjects: Bacterial cellulose -- Electrodeposition -- Hydrogen evolution reaction -- Platinum -- Turnover frequency; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2018.02.054
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: The nitrogen-doped carbon nanofiber derived from low and high proportion polyaniline doped bacterial cellulose (BC) was obtained via polymerization followed by pyrolysis. The resulting products were named LN-BC and HN-BC accordingly. Platinum nanoparticles modified LN-BC and HN-BC was then prepared (Pt@LN-BC and Pt@HN-BC) via electrochemical deposition. The morphologies of LN-BC and HN-BC indicated that the BC lost its nanowire structure after polyaniline modification and pyrolysis under nitrogen atmosphere. Platinum nanoparticles with diameters ranging from 3 to 5 nm can be well dispersed in the HN-BC support. The HER performance of Pt@LN-BC and Pt@HN-BC was fully investigated. Electrochemical results showed that the Pt-based catalysts had better HER activity than the Pt free catalysts in acid, indicating the HER activity was mainly from Pt. Besides, Pt@HN-BC had better HER activity than Pt@LN-BC in acid, suggesting N-doping rate was an important factor in enhancing HER activity. And the 10Pt@HN-BC (deposition for 10 s) with 4.38 wt% Pt loading was the best HER catalyst among the Pt@HN-BC. The onset potential (@ −1 mA cm −2 ) and overpotential (@ −10 mA cm −2 ) of the 10Pt@HN-BC in 0.5 M H2 SO4 is −18 and −47 mV, respectively. The corresponding Tafel slope was −35 mV dec −1, which is quite comparable to that of Pt/C (10 wt%). The electrochemical double layer capacitance (Cdl ) and turnover frequency (TOF) were estimated and presented in the work. Long-term stability test confirmed that the 10Pt@HN-BC had excellent stability, which was important for practical application. Graphical abstract: Highlights: Platinum nanoparticles modified nitrogen-doped carbon nanofiber was prepared via electrochemical deposition. The nitrogen-doped carbon nanofiber was derived from low and high proportion polyaniline doped bacterial cellulose (BC). The 10Pt@HN-BC with 4.38 wt% Pt loading had excellent HER activity. The overpotential and Tafel slope of the 10Pt@HN-BC (@ −10 mA cm −2 ) in 0.5 M H2 SO4 was −47 mV and −35 mV dec −1 respectively.