####################################################
# Joo Kang <kang@mrl.uiuc.edu>
# requesting 5 days, at minimum=4 days
# beamline 33BM, EXAFS studies of supported bimetallic catalysts
# instrument 33BM-B XAFS
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# top:/home/www/beamtime-requests/req01010.txt
# UNICAT Member Beam Time Request  #1010
# created Tue Jul 18 11:47:04 CDT 2006
####################################################

apsrun:
	2006-02

beamline:
	33BM

collaboration:
	Yes

collaborator_Jenia:
	ON

contact:
	kang@mrl.uiuc.edu

days:
	5

description:
	Static and dynamic structural behaviors of several Pt bimetallic catalysts are to be studied by XAFS technique. It has been known that the activity of catalysts is very sensitive to surface structure and electronic properties. By changing the amount of second metallic species (Ir, Re) we expect to see the evolution of different electronic and geometric structural behaviors of the supported catalysts. The supported catalysts will be mounted in an home-built XAFS cell and XAFS measurements will be made under different atmosphere (H2, He, O2) and at different sample temperatures ranging from 150 K to 700 K. The temperature will be controlled by liquid nitrogen and resistive heating element. Similar experiments have been performed at the beam line 33BM-B with monometallic Pt and Au catalysts. Since the catalysts will have very low metal loading (1-2 %) and plan to scan two different edges at each temperature and environment, a considerable amount of experiment time  is required.

equipment_required:
	

experiment:
	EXAFS studies of supported bimetallic catalysts

foreign_nationals:
	Joo Kang

hazards:
	flamable gas (H2, 4% in He balance), compressed gas ( H2, He and Ar )
liquid nitrogen, heating element for temperature control

instrument:
	33BM-B XAFS

instrument_other:
	

minimumdays:
	4

name:
	Joo Kang

nonmembers:
	

submit:
	Submit

unacceptable_dates:
	Note: This is for APS run cycle 3 in 2006, starting at Oct 1 through Dec 21, 2006

z34ID_change_undulator:
	no

z34ID_details:
	

z34ID_parasitic:
	no


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