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Fig. 3 Oxidation resistance ability and noble metal–like property for sputtered copper.
Oxidation resistance ability and noble metal–like property for sputtered copper. (A) N2O-TPO results of SP- and AE-made Cu/SiO2 catalysts, where the top-left panel shows a N2 release at 25°C with time on stream and the top-right panel shows a N2 release with temperature programming from 25° to 250°C. (B) UV-vis adsorption spectra of SP- and AE-made Cu/SiO2 catalysts. The inset shows magnification of the marked area. The Cu powder with a purity of 99% is also tested for comparison. The vertical dashed line marks the position of peak surface plasmon absorbance. (C) Photographs of various catalysts. Jian Sun et al. Sci Adv 2018;4:eaau3275 Copyright © 2018 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).
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