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Title: Dynamic and reversible transformations of subnanometre-sized palladium on ceria for efficient methane removal

Journal Article · · Nature Catalysis
ORCiD logo [1];  [2]; ORCiD logo [2]; ORCiD logo [1];  [1];  [3]; ORCiD logo [1]; ORCiD logo [4]; ORCiD logo [4]; ORCiD logo [5]
  1. Washington State University, Pullman, WA (United States)
  2. SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Stanford University, CA (United States)
  3. Argonne National Laboratory (ANL), Argonne, IL (United States)
  4. SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
  5. Washington State University, Pullman, WA (United States); Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)

Reversibly adjusting the active structures of supported metal catalysts in response to dynamic working conditions has long been pursued. Here we report the reaction-environment-modulated transformations of subnanometre-sized Pd on CeO2 for efficient methane removal, leveraging the reaction environments at different stages of automotive exhaust aftertreatment. During the cold start of vehicles, inactive Pd1 single atoms are readily transformed into PdO$$x$$ subnanometre clusters by CO even at room temperature with excess O2, resulting in boosted low-temperature CH4 oxidation. At elevated temperatures, dispersion of PdO$$x$$ cluster into Pd1 against metal sintering renders outstanding hydrothermal stability to the catalyst, to be activated during the next vehicle start. Combined experimental and computational studies elucidate the dynamically evolved Pd speciation on CeO2 at an atomic level. In conclusion, modulating the reversible nature of supported metals helps overcome the long-existing trade-off between low-temperature activity and high-temperature stability, also providing a new paradigm for designing intelligent catalysts that brings single-atom/cluster catalysts closer to real applications.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Office of Sustainable Transportation. Vehicle Technologies Office (VTO); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF); USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division (CSGB); Knut and Alice Wallenberg Foundation
Grant/Contract Number:
AC02-76SF00515; FG02-05ER15712; AC02-06CH11357; AC02-05CH11231; 2019.0586
OSTI ID:
2000051
Journal Information:
Nature Catalysis, Vol. 6, Issue 7; ISSN 2520-1158
Publisher:
Springer NatureCopyright Statement
Country of Publication:
United States
Language:
English

References (56)

Double-slit photoelectron interference in strong-field ionization of the neon dimer journal January 2019
PGM based catalysts for exhaust-gas after-treatment under typical diesel, gasoline and gas engine conditions with focus on methane and formaldehyde oxidation journal May 2020
ATHENA , ARTEMIS , HEPHAESTUS : data analysis for X-ray absorption spectroscopy using IFEFFIT journal June 2005
Generalized Gradient Approximation Made Simple journal October 1996
Tailoring the Local Environment of Platinum in Single‐Atom Pt 1 /CeO 2 Catalysts for Robust Low‐Temperature CO Oxidation journal September 2021
Catalyst deactivation via decomposition into single atoms and the role of metal loading journal August 2019
Low-Temperature Methane Oxidation for Efficient Emission Control in Natural Gas Vehicles: Pd and Beyond journal November 2020
Atomically Dispersed Pd–O Species on CeO 2 (111) as Highly Active Sites for Low-Temperature CO Oxidation journal September 2017
Complete oxidation of methane at low temperature over noble metal based catalysts: a review journal November 2002
Projector augmented-wave method journal December 1994
Tuning Single‐atom Pt 1 −CeO 2 Catalyst for Efficient CO and C 3 H 6 Oxidation: Size Effect of Ceria on Pt Structural Evolution journal October 2020
Rapid Electrochemical Methane Functionalization Involves Pd–Pd Bonded Intermediates journal November 2020
Operando and Kinetic Study of Low-Temperature, Lean-Burn Methane Combustion over a Pd/γ-Al 2 O 3 Catalyst journal January 2012
Elucidation of the Active Sites in Single-Atom Pd 1 /CeO 2 Catalysts for Low-Temperature CO Oxidation journal August 2020
The Active Phase of Palladium during Methane Oxidation journal February 2012
Tuning the Structure of Platinum Particles on Ceria In Situ for Enhancing the Catalytic Performance of Exhaust Gas Catalysts journal September 2017
From ultrasoft pseudopotentials to the projector augmented-wave method journal January 1999
Highly Active and Stable CH 4 Oxidation by Substitution of Ce 4+ by Two Pd 2+ Ions in CeO 2 (111) journal May 2018
Electron-energy-loss spectra and the structural stability of nickel oxide: An LSDA+U study journal January 1998
Heterogeneous single-atom catalysis journal May 2018
Highly selective defect-mediated photochemical CO2 conversion over fluorite ceria under ambient conditions journal January 2014
Reversible and cooperative photoactivation of single-atom Cu/TiO2 photocatalysts journal April 2019
Exceptional Activity for Methane Combustion over Modular Pd@CeO2 Subunits on Functionalized Al2O3 journal August 2012
Natural Gas Converter Performance and Durability conference March 1993
Single-atom Rh/N-doped carbon electrocatalyst for formic acid oxidation journal March 2020
Steam-created grain boundaries for methane C–H activation in palladium catalysts journal September 2021
Design considerations for low-temperature hydrocarbon oxidation reactions on Pd based catalysts journal November 2018
Atomically Dispersed Dopants for Stabilizing Ceria Surface Area journal May 2021
Single-atom catalysis of CO oxidation using Pt1/FeOx journal July 2011
Ab initiomolecular dynamics for liquid metals journal January 1993
Thermally stable single-atom platinum-on-ceria catalysts via atom trapping journal July 2016
Catalysis-Hub.org, an open electronic structure database for surface reactions journal May 2019
Highly durable metal ensemble catalysts with full dispersion for automotive applications beyond single-atom catalysts journal February 2020
Catalytic Oxidation of Methane: Pd and Beyond: Catalytic Oxidation of Methane: Pd and Beyond journal June 2018
Tracking the formation, fate and consequence for catalytic activity of Pt single sites on CeO2 journal September 2020
Unraveling the Intermediate Reaction Complexes and Critical Role of Support-Derived Oxygen Atoms in CO Oxidation on Single-Atom Pt/CeO 2 journal July 2021
Reaction product-driven restructuring and assisted stabilization of a highly dispersed Rh-on-ceria catalyst journal February 2022
Reaction-Mediated Transformation of Working Catalysts journal June 2022
Current state of the art and future needs for automotive exhaust catalysis journal July 2019
Intrinsic Ligand Effect Governing the Catalytic Activity of Pd Oxide Thin Films journal August 2014
Taming multiple valency with density functionals: A case study of defective ceria journal January 2005
Single-Atom Electrocatalysts journal October 2017
Special points for Brillouin-zone integrations journal June 1976
Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set journal October 1996
Carbon monoxide-induced adatom sintering in a Pd–Fe3O4 model catalyst journal June 2013
How copper catalyzes the electroreduction of carbon dioxide into hydrocarbon fuels journal January 2010
Tuning Pt-CeO2 interactions by high-temperature vapor-phase synthesis for improved reducibility of lattice oxygen journal March 2019
Structural evolution of atomically dispersed Pt catalysts dictates reactivity journal April 2019
The Effect of Prereduction on the Performance of Pd/Al 2 O 3 and Pd/CeO 2 Catalysts during Methane Oxidation journal June 2019
Thermally Stable Single‐Atom Heterogeneous Catalysts journal March 2021
In situ manipulation of the active Au-TiO 2 interface with atomic precision during CO oxidation journal January 2021
Zeolite supported Pd catalysts for the complete oxidation of methane: A critical review journal March 2022
Engineering catalyst supports to stabilize PdOx two-dimensional rafts for water-tolerant methane oxidation journal October 2021
Ceria and Its Defect Structure: New Insights from a Combined Spectroscopic Approach journal March 2016
Revisiting the Problem of Active Sites for Methane Combustion on Pd/Al2O3 by Operando XANES in a Lab-Scale Fixed-Bed Reactor journal May 2010
Low-Temperature Oxidation of Methane journal August 2012