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Title: Surface engineering at the interface of core/shell nanoparticles promotes hydrogen peroxide generation
Authors: Feng, Y
Shao, Q
Huang, B 
Zhang, J
Huang, X
Issue Date: 2018
Source: National science review, 2018, v. 5, no. 6, p. 895-906
Abstract: Hydrogen peroxide (H 2 O 2 ), an environmentally friendly oxidant, has already been widely used in many chemical synthesis and industrials as an alternative to replace traditional oxidants including chlorinated oxidizers and strong acids. However, the conventional synthesis method confronts intense energy cost, tedious separation procedures and high cost, which is not competitive with traditional oxidants. Although directH 2 O 2 synthesis fromH 2 and O 2 is a green and atomically economic reaction, satisfactory activity and desirable selectivity still remain formidable challenges. Herein, for the first time, a class of Pd@NiO-x nanoparticles (NPs) (x=1, 2, 3 and 4) with a unique core@shell interface structure has been created to achieve high activity, selectivity and stability for the direct H 2 O 2 synthesis. A precise thermal annealing on Pd@Ni-x NPs revealed that the resulting Pd@NiO-x NPs exhibited the volcano-like activity toward direct H 2 O 2 synthesis as a function of annealing temperature and time. By tuning the composition of Pd@NiO-x NPs and the reaction condition, the efficiency of H 2 O 2 synthesis could be well optimized with 5 wt% Pd@NiO-3/TiO 2 exhibiting the highest productivity (89 mol/(kg cat h)) and selectivity (91%) to H 2 O 2 as well as excellent stability, making it one of the best catalysts for direct H 2 O 2 synthesis reported to date.
Keywords: Core@Shell structure
Direct synthesis
Hydrogen peroxide
Nickel oxide
Palladium
Publisher: Oxford University Press
Journal: National science review 
ISSN: 2095-5138
EISSN: 2053-714X
DOI: 10.1093/nsr/nwy065
Rights: © The Author(s) 2018. Published by Oxford University Press on behalf of China Science Publishing & Media Ltd.
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits non-commercial reuse, distribution, and reproduction in any medium, provided the original work is properly cited. for commercial re-use, please contact journals.permissions@oup.com
The following publication Feng, Y., Shao, Q., Huang, B., Zhang, J., & Huang, X. (2018). Surface engineering at the interface of core/shell nanoparticles promotes hydrogen peroxide generation. National Science Review, 5(6), 895-906 is available at https://dx.doi.org/10.1093/nsr/nwy065
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