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Template growth of Au, Ni and Ni–Au nanoclusters on hexagonal boron nitride/Rh(111): a combined STM, TPD and AES study

Journal Article · · RSC Advances
DOI:https://doi.org/10.1039/c7ra08880a· OSTI ID:1425834
 [1];  [2];  [2];  [2]
  1. Texas A & M Univ., College Station, TX (United States). Dept. of Materials Science and Engineering; None
  2. Texas A & M Univ., College Station, TX (United States). Dept. of Materials Science and Engineering

In this study, the template growth of Au, Ni, and Ni–Au bimetallic nanoclusters on hexagonal boron nitride/Rh(111), i.e. h-BN/Rh(111), was investigated via scanning tunneling microscopy (STM), temperature programmed-desorption (TPD), and Auger electron spectroscopy (AES). STM study shows that template growth of Au clusters on h-BN/Rh(111) forms mainly well-dispersed monolayer clusters. In contrast, Ni forms large multilayer clusters showing a relatively high diffusivity on h-BN/Rh(111) substrate. Ni–Au bimetallic clusters are effectively formed first by Au deposition followed by Ni deposition, with the Au clusters functioning as nucleation sites for the subsequently deposited Ni. Further structural analysis was carried out via TPD and AES. The resulting TPD and AES data show the surface composition and charge transfer between Au and Ni of the bimetallic clusters. These results suggest that the h-BN/Rh(111) substrate represents a unique candidate for supporting Ni–Au bimetallic clusters in further catalytic reactions.

Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Center for Atomic-Level Catalyst Design (CALCD); Louisiana State Univ., Baton Rouge, LA (United States); Texas A & M Univ., College Station, TX (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
SC0001058
OSTI ID:
1425834
Journal Information:
RSC Advances, Journal Name: RSC Advances Journal Issue: 70 Vol. 7; ISSN 2046-2069; ISSN RSCACL
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English

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