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Journal Article

Fabrication of Nitrogen-Modified Annealed Nanodiamond with Improved Catalytic Activity


Su,  Dang Sheng
Shenyang National Laboratory for Materials Science Institute of Metal Research, Chinese Academy of Science;
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Lin, Y., & Su, D. S. (2014). Fabrication of Nitrogen-Modified Annealed Nanodiamond with Improved Catalytic Activity. ACS Nano, 8(8), 7823-7833. doi:10.1021/nn501286v.

Cite as: http://hdl.handle.net/11858/00-001M-0000-0023-CE60-5
Annealed ultradispersed nanodiamond (ADD) with sp2 curved concentric graphitic shells is an interesting hybrid material consisting of the remarkable surface properties of graphene-based nanomaterials and the intrinsic properties of a diamond core. In this case, based on its specific properties and surface oxygen functional groups, nitrogen-modified ADD powders have been tunably synthesized via three different preparation methods in a calcination treatment process. The detailed formation and dynamic behaviors of the nitrogen species on the modified ADD during the preparation process are revealed by elemental analysis, X-ray photoelectron spectroscopy (XPS) and temperature-programmed desorption. Moreover, we study the catalytic performance on the metal-free nitrogen-modified ADD catalysts by means of selective oxidation of benzylic alcohols as a probe reaction. The results indicate that the modified ADD catalysts exhibit a higher catalytic activity than pristine ADD. By correlating XPS data with catalytic measurements, we conclude that the pyridinic nitrogen species plays a pivotal role in the catalytic reaction. Our work provides valuable information on the design of modified carbon materials with more excellent properties.