####################################################
# Joo Kang <kang@mrl.uiuc.edu>
# requesting 5 days, at minimum=4 days
# beamline 33BM, Studies of supported Pt bimetallic catalysts
# instrument 33BM-B XAFS
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# top:/home/www/beamtime-requests/req00935.txt
# UNICAT Member Beam Time Request  #935
# created Fri Mar 10 16:34:19 CST 2006
####################################################

apsrun:
	2006-02

beamline:
	33BM

collaboration:
	No

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, Ru, Rh) 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 600 K. The temperature will be controlled by liquid nitrogen and resistive heating element. We have done similar experiments at the beam line 33BM-B with monometallic Pt catalysts and the most obvious change for this experiment will be the different types of catalysts. Since the catalysts will have very low metal loading (1-5 %) and plan to scan two different edges for each sample, long scan time hence long beam time is necessary for this experiment.

equipment_required:
	

experiment:
	Studies of supported Pt bimetallic catalysts

foreign_nationals:
	Joo Kang

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

instrument:
	33BM-B XAFS

instrument_other:
	

minimumdays:
	4

name:
	Joo Kang

nonmembers:
	

submit:
	Submit

unacceptable_dates:
	May 12-18, July 27-29
If possible, please assign the dates far apart from the another experiment submitted by Laurent Menard. We prefer to come twice rather than one long trip to APS. Thanks.

z34ID_details:
	


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