• 文献标题:   Novel palladium-guanine-reduced graphene oxide nanocomposite as efficient electrocatalyst for methanol oxidation reaction
  • 文献类型:   Article
  • 作  者:   NG JC, TAN CY, ONG BH, MATSUDA A, BASIRUN WJ, TAN WK, SINGH R, YAP BK
  • 作者关键词:   graphene, palladium nanoparticle, guanine, noncovalent functionalization, methanol oxidation reaction
  • 出版物名称:   MATERIALS RESEARCH BULLETIN
  • ISSN:   0025-5408 EI 1873-4227
  • 通讯作者地址:   Univ Malaya
  • 被引频次:   5
  • DOI:   10.1016/j.materresbull.2018.12.029
  • 出版年:   2019

▎ 摘  要

The agglomeration of metal catalysts can limit the performance of fuel cells. Herein, an easy, scalable, one-pot microwave-assisted method is proposed to introduce guanine, which is a nucleobase found in deoxyribonucleic acid and ribonucleic acid, to the reduced grapheme oxide-supported palladium via noncovalent functionalization. Considering the abundant amino, amide, and imino functional groups of guanine that act as anchoring sites, palladium nanoparticles of various shapes such as triangular, rectangular, circular, and diamond are uniformly distributed. The guanine itself is revealed to be catalytically active toward methanol oxidation reaction, serving as second catalyst. Consequently, the as-produced nanocomposite has a larger electrochemically active surface area (111.98 m(2) g(-1) vs. 63.80 m(2) g(-1)), greater methanol electro-oxidation ability (1017.42 mA mg(-1) vs. 359.80 mA mg(-1)), and higher stability in alkaline medium than its counterpart without guanine.