PMID- 24803093
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20150511
LR  - 20140528
IS  - 1520-5126 (Electronic)
IS  - 0002-7863 (Linking)
VI  - 136
IP  - 21
DP  - 2014 May 28
TI  - Tuning nanoparticle structure and surface strain for catalysis optimization.
PG  - 7734-9
LID - 10.1021/ja5030172 [doi]
AB  - Controlling nanoparticle (NP) surface strain, i.e. compression (or stretch) of 
      surface atoms, is an important approach to tune NP surface chemistry and to 
      optimize NP catalysis for chemical reactions. Here we show that surface Pt strain 
      in the core/shell FePt/Pt NPs with Pt in three atomic layers can be rationally 
      tuned via core structural transition from cubic solid solution [denoted as face 
      centered cubic (fcc)] structure to tetragonal intermetallic [denoted as face 
      centered tetragonal (fct)] structure. The high activity observed from the 
      fct-FePt/Pt NPs for oxygen reduction reaction (ORR) is due to the release of the 
      overcompressed Pt strain by the fct-FePt as suggested by quantum 
      mechanics-molecular mechanics (QM-MM) simulations. The Pt strain effect on ORR 
      can be further optimized when Fe in FePt is partially replaced by Cu. As a 
      result, the fct-FeCuPt/Pt NPs become the most efficient catalyst for ORR and are 
      nearly 10 times more active in specific activity than the commercial Pt catalyst. 
      This structure-induced surface strain control opens up a new path to tune and 
      optimize NP catalysis for ORR and many other chemical reactions.
FAU - Zhang, Sen
AU  - Zhang S
AD  - Department of Chemistry, Brown University , Providence, Rhode Island 02912, 
      United States.
FAU - Zhang, Xu
AU  - Zhang X
FAU - Jiang, Guangming
AU  - Jiang G
FAU - Zhu, Huiyuan
AU  - Zhu H
FAU - Guo, Shaojun
AU  - Guo S
FAU - Su, Dong
AU  - Su D
FAU - Lu, Gang
AU  - Lu G
FAU - Sun, Shouheng
AU  - Sun S
LA  - eng
PT  - Journal Article
DEP - 20140516
PL  - United States
TA  - J Am Chem Soc
JT  - Journal of the American Chemical Society
JID - 7503056
EDAT- 2014/05/08 06:00
MHDA- 2014/05/08 06:01
CRDT- 2014/05/08 06:00
PHST- 2014/05/08 06:00 [entrez]
PHST- 2014/05/08 06:00 [pubmed]
PHST- 2014/05/08 06:01 [medline]
AID - 10.1021/ja5030172 [doi]
PST - ppublish
SO  - J Am Chem Soc. 2014 May 28;136(21):7734-9. doi: 10.1021/ja5030172. Epub 2014 May 
      16.