One-step synthesis of Co2P/N-P co-doped porous carbon composites derived from soybean derivatives as acidic and alkaline HER electrocatalysts |
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Affiliation: | 1. School of Materials and Chemical Engineering, School of Science, Zhongyuan University of Technology, 1 Huaihe Road, Zhengzhou, 451191, PR China;2. Institute for Chemical Biology & Biosensing, College of Life Sciences, Qingdao University, 308 Ningxia Road, Qingdao, 266071, PR China |
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Abstract: | Developing inexpensive and efficient electrocatalysts for hydrogen evolution reaction (HER) in both acidic and alkaline mediums is of great significance to the hydrogen energy industry. Hereby, we prepared a mixture of precursors with homogeneous composition by using the chelating ability of soybean protein isolate (C and N source) and phytic acid (dopant and phosphating agent) with cobalt ions, and achieved one-step synthesis and construction of Co2P/N–P co-doped porous carbon composite by carbonization at 800 °C. The as-synthesized Co2P/NPPC-800 electrocatalyst exhibits low HER overpotentials of 121 and 125 mV at 10 mA cm?2 in 0.5 M H2SO4 and 1.0 M KOH, which are close to those of the commercial Pt/C catalyst. Additionally, the NPPC substrate surrounding the Co2P could diminish the corrosion during the HER, and Co2P/NPPC-800 displays good stability and durability. Furthermore, this work offers a convenient synthesis strategy for phosphide/doped porous carbon composites in other electrochemical energy technologies. |
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Keywords: | N–P co-doped porous carbon Dicobalt phosphide Composite electrocatalyst Hydrogen evolution reaction |
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