Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Synthesis Gas Conversion over Rh-Based Catalysts Promoted by Fe and Mn

Journal Article · · ACS Catalysis
 [1];  [2];  [2];  [2];  [2];  [3];  [4];  [2];  [2];  [5]
  1. Department of Chemical and Biological Engineering, University of Wisconsin—Madison, 1415 Engineering Drive, Madison, Wisconsin 53706, United States; Department of Chemical and Biological Engineering, University of Wisconsin—Madison
  2. Department of Chemical and Biological Engineering, University of Wisconsin—Madison, 1415 Engineering Drive, Madison, Wisconsin 53706, United States
  3. Department of Chemical and Biological Engineering, University of Wisconsin—Madison, 1415 Engineering Drive, Madison, Wisconsin 53706, United States; Institute of Chemistry, University of Campinas (UNICAMP), P.O. Box 6154, 13083-970 Campinas, São Paulo, Brazil
  4. Institute of Chemistry, University of Campinas (UNICAMP), P.O. Box 6154, 13083-970 Campinas, São Paulo, Brazil
  5. Department of Chemical and Biological Engineering, University of Wisconsin—Madison, 1415 Engineering Drive, Madison, Wisconsin 53706, United States

Rh/SiO2 catalysts promoted with Fe and Mn are selective for synthesis gas conversion to oxygenates and light hydrocarbons at 523 K and 580 psi. Selective anchoring of Fe and Mn species on Rh nanoparticles was achieved by controlled surface reactions and was evidenced by ultraviolet–visible absorption spectroscopy, scanning transmission electron microscopy, and inductively coupled plasma absorption emission spectroscopy. The interaction between Rh and Fe promotes the selective production of ethanol through hydrogenation of acetaldehyde and enhances the selectivity toward C2 oxygenates, which include ethanol and acetaldehyde. The interaction between Rh and Mn increases the overall reaction rate and the selectivity toward C2+ hydrocarbons. The combination of Fe and Mn on Rh/SiO2 results in trimetallic Rh-Fe-Mn catalysts that surpass the performance of their bimetallic counterparts. The highest selectivities toward ethanol (36.9%) and C2 oxygenates (39.6%) were achieved over the Rh-Fe-Mn ternary system with a molar ratio of 1:0.15:0.10, as opposed to the selectivities obtained over Rh/SiO2, which were 3.5% and 20.4%, respectively. The production of value-added oxygenates and C2+ hydrocarbons over this trimetallic catalyst accounted for 55% of the total products. X-ray photoelectron spectroscopy measurements suggest that significant fractions of the Fe and Mn species exist as metallic iron and manganese oxides on the Rh surface upon reduction. These findings are rationalized by density functional theory (DFT) calculations, which reveal that the exact state of metals on the surfaces is condition-dependent, with Mn present as Mn(I) and Mn(II) oxide on the Rh (211) step edges and Fe present as Fe(I) oxide on the step edge and metallic subsurface iron on both Rh steps and terraces. CO Fourier transform infrared spectroscopy and DFT calculations suggest that the binding of CO to Rh (211) step edges modified by Fe and/or manganese oxide is altered in comparison to CO adsorption on a clean Rh (211) surface. These results suggest that Mn2Ox species and Fe and Fe2O modify bonding at Rh step edges and shift reaction selectivity away from CH4.

Research Organization:
Univ. of Wisconsin, Madison, WI (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Contributing Organization:
Wisconsin Materials Research Science and Engineering Center; Environmental Molecular Sciences Laboratory (EMSL); the Center for Nanoscale Materials (CNM) at Argonne National Laboratory; and the National Energy Research Scientific Computing Center (NERSC)
Grant/Contract Number:
EE0006878
OSTI ID:
1396009
Alternate ID(s):
OSTI ID: 1396167
Journal Information:
ACS Catalysis, Journal Name: ACS Catalysis Journal Issue: 7 Vol. 7; ISSN 2155-5435
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

References (47)

Selective Adsorption of Manganese onto Rhodium for Optimized Mn/Rh/SiO 2 Alcohol Synthesis Catalysts journal October 2013
Synthesis of Supported RhMo and PtMo Bimetallic Catalysts by Controlled Surface Reactions journal September 2015
Chemocatalytic Conversion of Ethanol into Butadiene and Other Bulk Chemicals journal May 2013
Fe Promoted Rh-Clusters in Zeolite NaY: Characterization and Catalytic Performance in CO Hydrogenation journal April 1995
Effect of secondary additives (Li, Mn) in Fe-promoted Rh/TiO2 catalysts for the synthesis of ethanol from syngas journal November 2010
Ethanol Synthesis from Syngas on Transition Metal-Doped Rh(111) Surfaces: A Density Functional Kinetic Monte Carlo Study journal October 2013
Activity and Selectivity Trends in Synthesis Gas Conversion to Higher Alcohols journal October 2013
On the selectivity of Rh catalysts in the formation of oxygenates journal April 1986
Electronic structures of MRhO2, MRh2O4, RhMO4 and Rh2MO6 on the basis of X-ray spectroscopy and ESCA data journal January 1982
Efficiency of ab-initio total energy calculations for metals and semiconductors using a plane-wave basis set journal July 1996
Hydrogenation of carbon monoxide over vanadium oxide-promoted rhodium catalysts journal August 1987
Role of impurities in the enhancement of C2-oxygenates activity journal June 1990
Manganese-promoted Rh/Al2O3 for C2-oxygenates synthesis from syngas journal April 2004
Resolving surface chemical states in XPS analysis of first row transition metals, oxides and hydroxides: Cr, Mn, Fe, Co and Ni journal January 2011
Synthesis of ethanol from syngas over Rh/Ce1−xZrxO2 catalysts journal April 2011
Fe-promotion of supported Rh catalysts for direct conversion of syngas to ethanol journal January 2009
La, V, and Fe promotion of Rh/SiO2 for CO hydrogenation: Effect on adsorption and reaction journal October 2009
Ethanol synthesis from syngas over Rh-based/SiO2 catalysts: A combined experimental and theoretical modeling study journal May 2010
Synthesis of supported bimetallic nanoparticles with controlled size and composition distributions for active site elucidation journal August 2015
The effect of Fe–Rh alloying on CO hydrogenation to C2+ oxygenates journal September 2015
Measurement of intrinsic catalytic activity of Pt monometallic and Pt-MoOx interfacial sites over visible light enhanced PtMoOx/SiO2 catalyst in reverse water gas shift reaction journal December 2016
CO Chemisorption on Ultrathin MgO-Supported Palladium Nanoparticles journal March 2017
First-Principles-Based Microkinetics Simulations of Synthesis Gas Conversion on a Stepped Rhodium Surface journal August 2015
Role of the Cu-ZrO 2 Interfacial Sites for Conversion of Ethanol to Ethyl Acetate and Synthesis of Methanol from CO 2 and H 2 journal September 2016
A Review of Recent Literature to Search for an Efficient Catalytic Process for the Conversion of Syngas to Ethanol journal March 2008
Infrared studies of metal additive effects on carbon monoxide chemisorption modes on silicon dioxide-supported rhodium-manganese, -titanium and iron catalysts journal April 1985
Adsorption of carbon monoxide on manganese-promoted rhodium/silica catalysts as studied by infrared spectroscopy journal February 1990
Catalytic site requirements for elementary steps in syngas conversion to oxygenates over promoted rhodium journal September 1986
Selective Hydrogenolysis of Polyols and Cyclic Ethers over Bifunctional Surface Sites on Rhodium–Rhenium Catalysts journal August 2011
Mechanism of Ethanol Synthesis from Syngas on Rh(111) journal September 2009
Reverse Water–Gas Shift on Interfacial Sites Formed by Deposition of Oxidized Molybdenum Moieties onto Gold Nanoparticles journal August 2015
Intrinsic Selectivity and Structure Sensitivity of Rhodium Catalysts for C 2+ Oxygenate Production journal March 2016
Ethanol Synthesis from Syngas on the Stepped Rh(211) Surface: Effect of Surface Structure and Composition journal September 2014
Microcalorimetric, Infrared Spectroscopic, and DFT Studies of Ethylene Adsorption on Pt/SiO 2 and Pt−Sn/SiO 2 Catalysts journal May 1999
Enhanced ethanol production inside carbon-nanotube reactors containing catalytic particles journal May 2007
Accurate surface and adsorption energies from many-body perturbation theory journal July 2010
Status and prospects in higher alcohols synthesis from syngas journal January 2017
Catalytic synthesis of ethanol from CO and H2 under atmospheric pressure over pyrolysed rhodium carbonyl clusters on TiO2, ZrO2, and La2O3 journal January 1978
The role of the support in CO hydrogenation selectivity of supported rhodium journal January 1981
Ethanol promotion by the addition of cerium to rhodium–silica catalysts
  • Kiennemann, Alain; Breault, Raymond; Hindermann, Jean-Paul
  • Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases, Vol. 83, Issue 7 https://doi.org/10.1039/f19878302119
journal January 1987
Ab initio molecular dynamics for open-shell transition metals journal November 1993
From ultrasoft pseudopotentials to the projector augmented-wave method journal January 1999
Electronic structure of nanoscale iron oxide particles measured by scanning tunneling and photoelectron spectroscopies journal April 2005
Generalized Gradient Approximation Made Simple journal October 1996
Ultrahigh Purity Graphite Electrode by Core Level and Valence Band XPS journal December 1992
Ethanol for a Sustainable Energy Future journal February 2007
Highly Loaded Fe-MCM-41 Materials: Synthesis and Reducibility Studies journal December 2009

Cited By (6)

Fe-Based Nano-Materials in Catalysis journal May 2018
Atomic‐Scale Observation of the Metal–Promoter Interaction in Rh‐Based Syngas‐Upgrading Catalysts journal May 2019
Atomic‐Scale Observation of the Metal–Promoter Interaction in Rh‐Based Syngas‐Upgrading Catalysts journal June 2019
Operando monitoring of temperature and active species at the single catalyst particle level journal September 2019
Amination of 1-hexanol on bimetallic AuPd/TiO 2 catalysts journal January 2018
Atomically ultrathin RhCo alloy nanosheet aggregates for efficient water electrolysis in broad pH range journal January 2019

Similar Records

Intrinsic selectivity and structure sensitivity of Rhodium catalysts for C2+ oxygenate production [On the intrinsic selectivity and structure sensitivity of Rhodium catalysts for C2+ oxygenate production]
Journal Article · Sat Jan 30 23:00:00 EST 2016 · Journal of the American Chemical Society · OSTI ID:1351912

Ethanol synthesis from syngas over Rh-based/SiO2 catalysts: A combined experimental and theoretical modeling study
Journal Article · Tue May 04 00:00:00 EDT 2010 · Journal of Catalysis, 271(2):325-342 · OSTI ID:978506