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All sourcesNASA NTRSDOE OSTI
DOE OSTI2025

Single-atom Zr promoter boosts oxygen activation on ceria-supported Pt catalysts

Activation of surface lattice oxygen and chemisorbed oxygen on catalyst surfaces constitutes a pivotal step in heterogeneous oxidative catalysis. Herein, we report a strategy for enhancing oxygen activation by rational design of catalysts with single-atom promoters. Single-site Zr species in CeO 2 (Zr 1 -CeO 2 ) are synthesized using the atom-trapping method. The Zr 1 -CeO 2 -supported Pt catalyst exhibits enhanced catalytic performance over the CeO 2 -supported Pt catalyst in the oxidation of CO, C 3 H 8 , and C 3 H 6 , achieving significantly lower T 50 values (temperature required to reach 50% conversion). This enhanced catalytic activity is attributed to the formation of an asymmetric Zr 1 -O-Pt 1 structure, which favors the activation of the adjacent surface lattice oxygen and chemisorbed molecular oxygen. This work exemplifies that incorporating single-site atoms into oxide support facilitates oxygen activation, providing new insights into the role of atomically dispersed promoters in heterogeneous catalysis.

Science & Technology - Other Topics↗
DOE OSTI2020

Materials Data on PtO by Materials Project

PtO is Halite, Rock Salt structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Pt2+ is bonded to six equivalent O2- atoms to form a mixture of edge and corner-sharing PtO6 octahedra. The corner-sharing octahedral tilt angles are 0°. All Pt–O bond lengths are 2.31 Å. O2- is bonded to six equivalent Pt2+ atoms to form a mixture of edge and corner-sharing OPt6 octahedra. The corner-sharing octahedral tilt angles are 0°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on PtO2 by Materials Project

PtO2 is Hydrophilite structured and crystallizes in the orthorhombic Pnnm space group. The structure is three-dimensional. Pt4+ is bonded to six equivalent O2- atoms to form a mixture of corner and edge-sharing PtO6 octahedra. The corner-sharing octahedral tilt angles are 55°. All Pt–O bond lengths are 2.04 Å. O2- is bonded in a distorted trigonal planar geometry to three equivalent Pt4+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Pt3O4 by Materials Project

Pt3O4 crystallizes in the cubic Pm-3n space group. The structure is three-dimensional. Pt+2.67+ is bonded in a square co-planar geometry to four equivalent O2- atoms. All Pt–O bond lengths are 2.00 Å. O2- is bonded in a trigonal planar geometry to three equivalent Pt+2.67+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on PtO2 by Materials Project

PtO2 is Cuprite structured and crystallizes in the cubic Pn-3m space group. The structure is three-dimensional. Pt4+ is bonded to four equivalent O2- atoms to form corner-sharing PtO4 tetrahedra. All Pt–O bond lengths are 1.94 Å. O2- is bonded in a linear geometry to two equivalent Pt4+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Pt3O4 by Materials Project

Pt3O4 crystallizes in the cubic Im-3m space group. The structure is three-dimensional. Pt+2.67+ is bonded in a body-centered cubic geometry to eight equivalent O2- atoms. All Pt–O bond lengths are 2.37 Å. O2- is bonded in a 6-coordinate geometry to six equivalent Pt+2.67+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on PtO3 by Materials Project

PtO3 is Upper Bainite-like structured and crystallizes in the trigonal R-3c space group. The structure is three-dimensional. Pt6+ is bonded to six equivalent O2- atoms to form corner-sharing PtO6 octahedra. The corner-sharing octahedral tilt angles are 52°. All Pt–O bond lengths are 1.97 Å. O2- is bonded in a bent 120 degrees geometry to two equivalent Pt6+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on PtO2 by Materials Project

PtO2 crystallizes in the hexagonal P6_3mc space group. The structure is two-dimensional and consists of two PtO2 sheets oriented in the (0, 0, 1) direction. Pt4+ is bonded to six equivalent O2- atoms to form edge-sharing PtO6 octahedra. All Pt–O bond lengths are 2.06 Å. O2- is bonded in a distorted trigonal non-coplanar geometry to three equivalent Pt4+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on PtO by Materials Project

PtO crystallizes in the tetragonal P4_2/mmc space group. The structure is three-dimensional. Pt2+ is bonded in a square co-planar geometry to four equivalent O2- atoms. All Pt–O bond lengths are 2.07 Å. O2- is bonded to four equivalent Pt2+ atoms to form a mixture of edge and corner-sharing OPt4 tetrahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on PtO2 by Materials Project

PtO2 is Hydrophilite structured and crystallizes in the tetragonal P4_2/mnm space group. The structure is three-dimensional. Pt4+ is bonded to six equivalent O2- atoms to form a mixture of edge and corner-sharing PtO6 octahedra. The corner-sharing octahedral tilt angles are 53°. There are two shorter (2.01 Å) and four longer (2.04 Å) Pt–O bond lengths. O2- is bonded in a trigonal planar geometry to three equivalent Pt4+ atoms.

36 MATERIALS SCIENCE↗