Stable platinum nanoclusters on genomic DNA-graphene oxide with a high oxygen reduction reaction activity

Jitendra N. Tiwari, Krishna Nath, Susheel Kumar, Rajanish N. Tiwari, K. Christian Kemp, Nhien H. Le, Duck Hyun Youn, Jae Sung Lee, Kwang S. Kim

Research output: Contribution to journalArticlepeer-review

172 Scopus citations

Abstract

Nanosize platinum clusters with small diameters of 2-4 nm are known to be excellent catalysts for the oxygen reduction reaction. The inherent catalytic activity of smaller platinum clusters has not yet been reported due to a lack of preparation methods to control their size (<2 nm). Here we report the synthesis of platinum clusters (diameter ≤1.4 nm) deposited on genomic double-stranded DNA-graphene oxide composites, and their high-performance electrocatalysis of the oxygen reduction reaction. The electrochemical behaviour, characterized by oxygen reduction reaction onset potential, half-wave potential, specific activity, mass activity, accelerated durability test (10,000 cycles) and cyclic voltammetry stability (10,000 cycles) is attributed to the strong interaction between the nanosize platinum clusters and the DNA-graphene oxide composite, which induces modulation in the electronic structure of the platinum clusters. Furthermore, we show that the platinum cluster/DNA-graphene oxide composite possesses notable environmental durability and stability, vital for high-performance fuel cells and batteries.

Original languageEnglish
Article number2221
JournalNature Communications
Volume4
DOIs
StatePublished - 2013

Fingerprint

Dive into the research topics of 'Stable platinum nanoclusters on genomic DNA-graphene oxide with a high oxygen reduction reaction activity'. Together they form a unique fingerprint.

Cite this