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Title: Systematic theoretical study of ethylene adsorption on δ-MoC(001), TiC(001), and ZrC(001) surfaces

Journal Article · · Journal of Physical Chemistry. C
 [1];  [2];  [1];  [3];  [3]
  1. Univ. de Antioquia UdeA, Medellin (Columbia)
  2. Univ. de Medellin, Medellin (Columbia)
  3. Brookhaven National Lab. (BNL), Upton, NY (United States)

A systematic study of ethylene adsorption over δ-MoC(001), TiC(001), and ZrC(001) surfaces was conducted by means of calculations based on periodic density functional theory. The structure and electronic properties of each carbide pristine surface had a strong influence in the bonding of ethylene. It was found that the metal and carbon sites of the carbide could participate in the adsorption process. As a consequence of this, very different bonding mechanisms were seen on δ-MoC(001) and TiC(001). The bonding of the molecule on the TMC(001) systems showed only minor similarities to the type of bonding found on a typical metal like Pt(111). In general, the ethylene binding energy follow the trend in stability: ZrC(001) < TiC(001) < δ-MoC(001) < Pt(111). The van der Waals correction to the energy produces large binding energy values, modifies the stability orders and drives the ethylene closer to the surface but the adsorbate geometry parameters remain unchanged. Ethylene was activated on clearly defined binding geometries, changing its hybridization from sp2 to sp3 with an elongation (0.16–0.31 Å) of the C=C bond. As a result, on the basis of this theoretical study, δ-MoC(001) is proposed as a potential catalyst for the hydrogenation of olefins, whereas TiC(001) could be useful for their hydrogenolysis.

Research Organization:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC00112704
OSTI ID:
1326743
Report Number(s):
BNL-112634-2016-JA; R&D Project: CO027; KC0302010
Journal Information:
Journal of Physical Chemistry. C, Vol. 120, Issue 25; ISSN 1932-7447
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 17 works
Citation information provided by
Web of Science

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Cited By (2)

Surface and Interface Engineering: Molybdenum Carbide–Based Nanomaterials for Electrochemical Energy Conversion journal September 2019
Binding and activation of ethylene on tungsten carbide and platinum surfaces journal January 2019