Density functional theory studies of HCOOH decomposition on Pd(111)
- Univ. of Wisconsin-Madison, Madison, WI (United States); Department of Chemical and Biological Engineering, University of Wisconsin-Madison
- Univ. of Wisconsin-Madison, Madison, WI (United States)
Here, the investigation of formic acid (HCOOH) decomposition on transition metal surfaces is important to derive useful insights for vapor phase catalysis involving HCOOH and for the development of direct HCOOH fuel cells (DFAFC). Here we present the results obtained from periodic, self-consistent, density functional theory (DFT-GGA) calculations for the elementary steps involved in the gas-phase decomposition of HCOOH on Pd(111). Accordingly, we analyzed the minimum energy paths for HCOOH dehydrogenation to CO2 + H2 and dehydration to CO + H2O through the carboxyl (COOH) and formate (HCOO) intermediates. Our results suggest that HCOO formation is easier than COOH formation, but HCOO decomposition is more difficult than COOH decomposition, in particular in presence of co-adsorbed O and OH species. Therefore, both paths may contribute to HCOOH decomposition. CO formation goes mainly through COOH decomposition.
- Research Organization:
- Energy Frontier Research Centers (EFRC) (United States). Institute for Atom-efficient Chemical Transformations (IACT); Univ. of Wisconsin-Madison, Madison, WI (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); USDOE Office of Science (SC), Biological and Environmental Research (BER); USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23)
- Contributing Organization:
- EMSL, a National scientific user facility at Pacific Northwest National Laboratory (PNNL); and the National Energy Research Scientific Computing Center (NERSC); the Center for Nanoscale Materials at Argonne National Laboratory (ANL)
- Grant/Contract Number:
- AC02-05CH11231; AC02-06CH11357; FG02-05ER15731
- OSTI ID:
- 1406902
- Alternate ID(s):
- OSTI ID: 1373614
- Journal Information:
- Surface Science, Journal Name: Surface Science Journal Issue: C Vol. 650; ISSN 0039-6028
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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