首页|Hydrolysis mechanism of YbB2C2 and the microstructure of the carbon derived from the hydrolysis reaction
Hydrolysis mechanism of YbB2C2 and the microstructure of the carbon derived from the hydrolysis reaction
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Carbide-derived carbon(CDC)materials have gained great attention due to the excellent properties for various potential applications.Here,graphite crystal is formed during a room-temperature hydrolysis pro-cess of layered compound YbB2C2.The formation mechanism can be demonstrated by a YbB2C2 molecular cell:Yb3+acts as a cathode where H2O molecule is reduced to H atom and OH-ion,while(B2C2)3-acts as an anode where OH-ion is oxidized to O atom.Then,YbB2C2 molecular cell begins to disintegrate,i.e.,Yb3+ion,B and C atoms dissociate from the molecular cell.The as-produced C atoms combine to form graphite crystal.The initial graphite crystal is a cabbage-like microsphere,and then it gradually disintegrates and transforms into layered graphite.In addition,YbB6,Yb3(OH)3n(BO3)(3-n)sol,hydrogen,hydrocarbons,and carbon oxides form simultaneously.Our method provides a general and inexpensive route to obtain carbide-derived graphite crystal.
Shenyang National Laboratory for Materials Science,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China
School of Materials Science and Engineering,University of Science and Technology of China,Shenyang 110016,China
Shanghai Key Laboratory for High Temperature Materials and Precision Forming,School of Materials Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,China
National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of China
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