Chemistry Division, Brookhaven National Laboratory, Upton, NY 11973, USA.
Facultad de Ciencias, Universidad Central de Venezuela, Caracas 1020-A, Venezuela.
Science. 2017 Sep 1;357(6354). doi: 10.1126/science.aan8210.
In their Comment on the our recent Report, Nakamura 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) and mixtures of carbon dioxide (CO)/H 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, the most active phase of these catalysts contained a ZnO-Cu interface.
在他们对我们最近报告的评论中，Nakamura 认为我们的 X 射线光电子能谱（XPS）分析受到催化剂表面甲酸盐物种存在的影响。这种说法是不正确的，因为反应物气体在 525 到 575 开尔文的温度下被抽空，在这种条件下，甲酸盐在催化剂表面上是不稳定的。对氧化锌/铜（111）[ZnO/Cu(111)]表面暴露于氢气（H）和二氧化碳（CO）/H 的混合物后的 XPS 结果进行分析表明，不存在碳（C）1s 信号，氧（O）1s 峰没有不对称性，并且 Zn：O 强度接近 1：1。因此，这些催化剂最活跃的相包含 ZnO-Cu 界面。
