Cited by 125CO2 Reduction Techniques and CatalystsCatalysts for Methane ReformingElectrocatalysts for Energy Conversion

Intermetallic Alloys as CO Electroreduction Catalysts—Role of Isolated Active Sites

Karamad, Mohammadreza, Tripkovic, Vladimir, Rossmeisl, Jan·2014·ACS Catalysis

Abstract

One of the main challenges associated with the electrochemical CO or CO 2 reduction is poor selectivity toward energetically rich products. In order to promote selectivity toward hydrocarbons and alcohols, most notably, the hydrogen evolution reaction (HER) should be suppressed. To achieve this goal, we studied intermetallic compounds consisting of transition metal (TM) elements that can reduce CO (Ru, Co, Rh, Ir, Ni, Pd, Pt, and Cu) separated by TM and post transition metal elements (Ag, Au, Cd, Zn, Hg, In, Sn, Pb, Sb, and Bi) that are very poor HER catalysts. In total, 34 different stable binary bulk alloys forming from these elements have been investigated using density functional theory calculations. The electronic and geometric properties of the catalyst surface can be tuned by varying the size of the active centers and the elements forming them. We have identified six different potentially selective intermetallic surfaces on which CO can be reduced to methanol at potentials comparable to or even slightly positive than those for CO/CO 2 reduction to methane on Cu. Common features shared by most of the selective alloys are single TM sites. The role of single sites is to block parasitic HER and thereby promote CO reduction.

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Crossref · 10.1021/cs500328c

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Authors
Karamad, M., Tripkovic, V., & Rossmeisl, J.
Affiliations
  • Technical University of Denmark (DK)
  • Center for Atomic-scale Materials Design, Department of Physics, Technical University of Denmark, Fysikvej, Building 311, DK-2800 Kongens Lyngby, Denmark
Venue
ACS Catalysis
Published
2014-06-13
Volume
4
Issue
7
Pages
2268-2273
ISSN
2155-5435 (ISSN-L)
OpenAlex
W2330796308
Cited by
125
References
50
Citations by year
2026: 5 · 2025: 7 · 2024: 20 · 2023: 16 · 2022: 5 · 2021: 11 · 2020: 7 · 2019: 13 · 2018: 10 · 2017: 8 · 2016: 11 · 2015: 11 · 2014: 1
FWCI
3.41
Type
journal article
Language
en
Open access
closed
Locations
  • ACS Catalysis (publishedVersion)
  • Technical University of Denmark, DTU Orbit (Technical University of Denmark, DTU) (submittedVersion)
Topics
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › CO2 Reduction Techniques and Catalysts
  • Physical Sciences › Chemical Engineering › Catalysis › Catalysts for Methane Reforming
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Electrocatalysts for Energy Conversion
Keywords
CO electroreduction, intermetallic alloys, hydrogen evolution suppression, methanol selectivity, CO2 reduction, single-site catalysts, electronic structure, geometric structure, electrocatalysis

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