TY - JOUR
T1 - Metal phosphates as a new class of supports for gold nanocatalysts
AU - Ma, Zhen
AU - Yin, Hongfeng
AU - Overbury, Steven H.
AU - Dai, Sheng
PY - 2008/11
Y1 - 2008/11
N2 - Oxides and carbon are commonly used as supports for gold nanoparticles, but metal salts are barely considered as suitable supports. Our group recently communicated that gold nanoparticles supported on nanosized LaPO4 (6-8 nm) are active for CO oxidation (Yan et al., Angew Chem Int Ed 45:3614, 2006). In the current work, we systematically developed an array of Au/M-P-O catalysts and tested them for catalytic activity and stability. It was found that 200°C-pretreated Au/M-P-O (M = Ca, Fe, Co, Y, La, Pr, Nd, Sm, Eu, Ho, Er) show high CO conversions below 50°C, and 500°C-pretreated Au/M-P-O (M = Ca, Y, La, Pr, Nd, Sm, Eu, Ho, Er) show high CO conversions below 100°C. These samples were characterized by ICP-OES, BET, XRD, TEM, SEM, and H2-TPR. The stability of selected catalysts was studied as a function of time on stream. This work furnishes a new catalyst system for further fundamental and applied research.
AB - Oxides and carbon are commonly used as supports for gold nanoparticles, but metal salts are barely considered as suitable supports. Our group recently communicated that gold nanoparticles supported on nanosized LaPO4 (6-8 nm) are active for CO oxidation (Yan et al., Angew Chem Int Ed 45:3614, 2006). In the current work, we systematically developed an array of Au/M-P-O catalysts and tested them for catalytic activity and stability. It was found that 200°C-pretreated Au/M-P-O (M = Ca, Fe, Co, Y, La, Pr, Nd, Sm, Eu, Ho, Er) show high CO conversions below 50°C, and 500°C-pretreated Au/M-P-O (M = Ca, Y, La, Pr, Nd, Sm, Eu, Ho, Er) show high CO conversions below 100°C. These samples were characterized by ICP-OES, BET, XRD, TEM, SEM, and H2-TPR. The stability of selected catalysts was studied as a function of time on stream. This work furnishes a new catalyst system for further fundamental and applied research.
KW - Activity
KW - CO oxidation
KW - Gold catalysis
KW - Metal phosphates
KW - Nanoparticles
UR - http://www.scopus.com/inward/record.url?scp=55149099599&partnerID=8YFLogxK
U2 - 10.1007/s10562-008-9627-x
DO - 10.1007/s10562-008-9627-x
M3 - Article
AN - SCOPUS:55149099599
SN - 1011-372X
VL - 126
SP - 20
EP - 30
JO - Catalysis Letters
JF - Catalysis Letters
IS - 1-2
ER -