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The effect of adding Cu on the nitrogen removal efficiency of Ti for the synthesis of a large type IIa diamond under high temperature and high pressure by Guo, Ming-ming (author);Li, Shang-sheng (author);Feng, Lu (author);Hu, Mei-hua (author);Su, Tai-chao (author);Gao, Guang-jin (author);Wang, Jun-zhuo (author);You, Yue (author);Nie, Yuan (author) is a Materials Science article available to read on EtoBox.
What is The effect of adding Cu on the nitrogen removal efficiency of Ti for the synthesis of a large type IIa diamond under high temperature and high pressure about?
Rationally designing and optimizing metal-free electrocatalysts for the oxygen reduction reaction (ORR) is of great importance for fuel cells and metal-air batteries, but remains a great challenge. A N,S-codoped graphene-like carbon (GLC) was synthesized by a simple carbon-bath pyrolysis method, in which urea and thiourea (1:1 w/w) were used as both the sacrificial template and source of nitrogen and sulfur, and glucose as the carbon precursor. A mixture of these materials was placed in a crucible that was contained in a larger crucible full of carbon powder. Compared with N-doped or S-doped GLCs synthesized using only urea or thiourea, respectively, the N,S-codoped GLC had a pore volume of 0.63 cm 3 /g and a larger specific surface area of 583.68 m 2 /g, the highest micropore to total surface area of 29.39% and micropore to total pore volume of 12.70%, and the highest pyridinic-N and graphitic-N content of up to 92.2%. The N,Scodoped GLC showed a high electrocatalytic activity for ORR with a midwave potential (E 1/2 ) of 0.82 V RHE , which was more positive than that of Pt/ C (E 1/2 1⁄40.80 V RHE ) in an alkaline electrolyte. The N, S-codoped GLC catalyst had better stability and
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- Author
- Guo, Ming-ming (author);Li, Shang-sheng (author);Feng, Lu (author);Hu, Mei-hua (author);Su, Tai-chao (author);Gao, Guang-jin (author);Wang, Jun-zhuo (author);You, Yue (author);Nie, Yuan (author)
- Publisher
- Elsevier BV
- Published
- 2021
- Language
- EN
- Field
- Materials Science (Physical Sciences)