TY - JOUR
T1 - Microwave-assisted optimization of platinum-nickel nanoalloys for catalytic water treatment
AU - Ma, Hanyu
AU - Wang, Haitao
AU - Na, Chongzheng
N1 - Funding Information:
This work was mainly supported by the USDOE Office of Nuclear Energy's Nuclear Energy University Programs, the U.S. National Science Foundation's Environmental Engineering Program, and the University of Notre Dame Sustainable Energy Initiative. H.M. thanks support from the Bayer Predoctoral Research Fellowship provided by the Notre Dame Center for Environmental Science and Technology.
PY - 2015/2
Y1 - 2015/2
N2 - Blending noble metal catalysts with inexpensive transition metals can reduce material cost in catalytic water treatment by improving the catalytic reactivity. An important challenge is, however, to synthesize a series of alloy nanoparticles with varied compositions so that the screening of catalytic reactivity can be performed rapidly for a contaminant of interest. Here, we report a facile approach for the rapid synthesis of bimetallic nanoalloys using cycle-controlled microwave-assisted polyol reduction, with an option of fixing the nanoalloys directly on graphene supports in a one-pot operation. Using Pt and Ni as the model noble and promoter metals, we show that Pt/Ni nanoparticles with diameters ranging from 2.8 to 4. nm can be readily synthesized within minutes. The surface Ni percentage of the nanoparticles are varied from 0 to 100%, which serves as a model system for nanoalloy screening. Using the model contaminant p-nitrophenol, we further show that the reactivity-composition relationship has a classic volcano shape as the Sabatier principle predicts. The highest reactivity is found with a surface Ni percentage of approximately 50%.
AB - Blending noble metal catalysts with inexpensive transition metals can reduce material cost in catalytic water treatment by improving the catalytic reactivity. An important challenge is, however, to synthesize a series of alloy nanoparticles with varied compositions so that the screening of catalytic reactivity can be performed rapidly for a contaminant of interest. Here, we report a facile approach for the rapid synthesis of bimetallic nanoalloys using cycle-controlled microwave-assisted polyol reduction, with an option of fixing the nanoalloys directly on graphene supports in a one-pot operation. Using Pt and Ni as the model noble and promoter metals, we show that Pt/Ni nanoparticles with diameters ranging from 2.8 to 4. nm can be readily synthesized within minutes. The surface Ni percentage of the nanoparticles are varied from 0 to 100%, which serves as a model system for nanoalloy screening. Using the model contaminant p-nitrophenol, we further show that the reactivity-composition relationship has a classic volcano shape as the Sabatier principle predicts. The highest reactivity is found with a surface Ni percentage of approximately 50%.
KW - Bimetallic alloy
KW - Industrial wastewater treatment
KW - Nano catalyst
KW - Nitroaromatic reduction
KW - Noble metal catalyst
UR - http://www.scopus.com/inward/record.url?scp=84906228738&partnerID=8YFLogxK
U2 - 10.1016/j.apcatb.2014.07.062
DO - 10.1016/j.apcatb.2014.07.062
M3 - Article
AN - SCOPUS:84906228738
VL - 163
SP - 198
EP - 204
JO - Applied Catalysis B: Environmental
JF - Applied Catalysis B: Environmental
SN - 0926-3373
ER -