Response to Comment on “Active sites for CO2 hydrogenation to methanol on Cu/ZnO catalysts”
[1];
[2];
[3];
[4];
[4]
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Central Univ. of Venezuela, Caracas (Venezuela)
- Brookhaven National Lab. (BNL), Upton, NY (United States); Columbia Univ., New York, NY (United States)
- Brookhaven National Lab. (BNL), Upton, NY (United States); Stony Brook Univ., NY (United States)
In their Comment on our recent paper, Nakamura et al. argue that our x-ray photoelectron spectroscopy (XPS) analysis was affected by the presence of formate species on the catalyst surface. This argument is not valid because the reactant gases were evacuated at temperatures from 525 to 575 kelvin, conditions under which formate is not stable on the catalyst surface. An analysis of the XPS results obtained after exposing zinc oxide/copper (111) [ZnO/Cu(111)] surfaces to hydrogen (H2) and mixtures of carbon dioxide (CO2)/H2 show an absence of carbon (C) 1s signal, no asymmetries in the oxygen (O) 1s peak, and a Zn:O intensity close to 1:1. Thus and finally, the most active phase of these catalysts contained a ZnO-Cu interface.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- SC0012704
- OSTI ID:
- 1392266
- Report Number(s):
- BNL-114318-2017-JA; R&D Project: CO040; KC0302010
- Journal Information:
- Science, Vol. 357, Issue 6354; ISSN 0036-8075
- Publisher:
- AAASCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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