PMID- 23036092
OWN - NLM
STAT- MEDLINE
DCOM- 20130516
LR  - 20131121
IS  - 1936-086X (Electronic)
IS  - 1936-0851 (Linking)
VI  - 6
IP  - 11
DP  - 2012 Nov 27
TI  - Nitrogen-doped graphene-rich catalysts derived from heteroatom polymers for 
      oxygen reduction in nonaqueous lithium-O2 battery cathodes.
PG  - 9764-76
LID - 10.1021/nn303275d [doi]
AB  - In this work, we present a synthesis approach for nitrogen-doped 
      graphene-sheet-like nanostructures via the graphitization of a heteroatom 
      polymer, in particular, polyaniline, under the catalysis of a cobalt species 
      using multiwalled carbon nanotubes (MWNTs) as a supporting template. The 
      graphene-rich composite catalysts (Co-N-MWNTs) exhibit substantially improved 
      activity for oxygen reduction in nonaqueous lithium-ion electrolyte as compared 
      to those of currently used carbon blacks and Pt/carbon catalysts, evidenced by 
      both rotating disk electrode and Li-O(2) battery experiments. The 
      synthesis-structure-activity correlations for the graphene nanostructures were 
      explored by tuning their synthetic chemistry (support, nitrogen precursor, 
      heating temperature, and transition metal type and content) to investigate how 
      the resulting morphology and nitrogen-doping functionalities (e.g., pyridinic, 
      pyrrolic, and quaternary) influence the catalyst activity. In particular, an 
      optimal temperature for heat treatment during synthesis is critical to creating a 
      high-surface-area catalyst with favorable nitrogen doping. The sole Co phase, 
      Co(9)S(8), was present in the catalyst but plays a negligible role in ORR. 
      Nevertheless, the addition of Co species in the synthesis is indispensable for 
      achieving high activity, due to its effects on the final catalyst morphology and 
      structure, including surface area, nitrogen doping, and graphene formation. This 
      new route for the preparation of a nitrogen-doped graphene nanocomposite with 
      carbon nanotube offers synthetic control of morphology and nitrogen functionality 
      and shows promise for applications in nonaqueous oxygen reduction 
      electrocatalysis for Li-O(2) battery cathodes.
FAU - Wu, Gang
AU  - Wu G
AD  - Materials Physics and Applications Division, Los Alamos National Laboratory, Los 
      Alamos, New Mexico 87545, United States. wugang@lanl.gov
FAU - Mack, Nathan H
AU  - Mack NH
FAU - Gao, Wei
AU  - Gao W
FAU - Ma, Shuguo
AU  - Ma S
FAU - Zhong, Ruiqin
AU  - Zhong R
FAU - Han, Jiantao
AU  - Han J
FAU - Baldwin, Jon K
AU  - Baldwin JK
FAU - Zelenay, Piotr
AU  - Zelenay P
LA  - eng
PT  - Journal Article
PT  - Research Support, U.S. Gov't, Non-P.H.S.
DEP - 20121010
PL  - United States
TA  - ACS Nano
JT  - ACS nano
JID - 101313589
RN  - 0 (Polymers)
RN  - 059QF0KO0R (Water)
RN  - 7782-42-5 (Graphite)
RN  - 9FN79X2M3F (Lithium)
RN  - N762921K75 (Nitrogen)
RN  - S88TT14065 (Oxygen)
SB  - IM
MH  - Catalysis
MH  - *Electric Power Supplies
MH  - *Electrodes
MH  - Equipment Design
MH  - Equipment Failure Analysis
MH  - Graphite/*chemistry
MH  - Lithium/*chemistry
MH  - Nitrogen/*chemistry
MH  - Oxidation-Reduction
MH  - Oxygen/*chemistry
MH  - Polymers/*chemistry
MH  - Water/chemistry
EDAT- 2012/10/06 06:00
MHDA- 2013/05/17 06:00
CRDT- 2012/10/06 06:00
PHST- 2012/10/06 06:00 [entrez]
PHST- 2012/10/06 06:00 [pubmed]
PHST- 2013/05/17 06:00 [medline]
AID - 10.1021/nn303275d [doi]
PST - ppublish
SO  - ACS Nano. 2012 Nov 27;6(11):9764-76. doi: 10.1021/nn303275d. Epub 2012 Oct 10.