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Promoting the Direct H 2 O 2 Generation Catalysis by Using Hollow Pd–Sn Intermetallic Nanoparticles
Author(s) -
Zhang Junbo,
Shao Qi,
Zhang Ying,
Bai Shuxing,
Feng Yonggang,
Huang Xiaoqing
Publication year - 2018
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201703990
Subject(s) - catalysis , intermetallic , materials science , selectivity , x ray photoelectron spectroscopy , nanoparticle , diffuse reflectance infrared fourier transform , hydrogen peroxide , chemical engineering , adsorption , fourier transform infrared spectroscopy , inorganic chemistry , nanotechnology , chemistry , photocatalysis , metallurgy , alloy , organic chemistry , engineering
Although direct hydrogen (H 2 ) oxidation to hydrogen peroxide (H 2 O 2 ) is considered as a promising strategy for direct H 2 O 2 synthesis, the desirable conversion efficiency remains formidable challenge. Herein, highly active and selective direct H 2 oxidation to H 2 O 2 is achieved by using hollow Pd–Sn intermetallic nanoparticles (NPs) as the catalysts. By tuning the catalytic solvents and catalyst supports, the efficiency of direct H 2 oxidation to H 2 O 2 can be optimized well with the hollow Pd 2 Sn NPs/P25 exhibiting H 2 O 2 selectivity up to 80.7% and productivity of 60.8 mol kg cat −1 h −1 . In situ diffuse reflectance infrared Fourier transform spectroscopy of CO adsorption results confirm the different surface atom arrangements between solid and hollow Pd–Sn NPs. X‐ray photoelectron spectra results show that the higher efficiency of Pd 2 Sn NPs/P25 is due to its higher content of metallic Pd and higher ratio of Sn x + , which benefit H 2 O 2 production and selectivity.