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Title: Response to Comment on “Active sites for CO 2 hydrogenation to methanol on Cu/ZnO catalysts”

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 (H 2) and mixtures of carbon dioxide (CO 2)/H 2 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.
Authors:
ORCiD logo [1] ; ORCiD logo [2] ; ORCiD logo [3] ; ORCiD logo [4] ; ORCiD logo [4]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States)
  2. Central Univ. of Venezuela, Caracas (Venezuela)
  3. Brookhaven National Lab. (BNL), Upton, NY (United States); Columbia Univ., New York, NY (United States)
  4. Brookhaven National Lab. (BNL), Upton, NY (United States); Stony Brook Univ., NY (United States)
Publication Date:
Report Number(s):
BNL-114318-2017-JA
Journal ID: ISSN 0036-8075; R&D Project: CO040; KC0302010
Grant/Contract Number:
SC0012704
Type:
Accepted Manuscript
Journal Name:
Science
Additional Journal Information:
Journal Volume: 357; Journal Issue: 6354; Journal ID: ISSN 0036-8075
Publisher:
AAAS
Research Org:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
OSTI Identifier:
1392266