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Direct and Selective Synthesis of Hydrogen Peroxide over Palladium–Tellurium Catalysts at Ambient Pressure
Author(s) -
Tian Pengfei,
Xu Xingyan,
Ao Can,
Ding Doudou,
Li Wei,
Si Rui,
Tu Weifeng,
Xu Jing,
Han YiFan
Publication year - 2017
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201701238
Subject(s) - palladium , tellurium , catalysis , selectivity , hydrogen peroxide , chemistry , hydrogen , density functional theory , photochemistry , inorganic chemistry , organic chemistry , computational chemistry
Highly selective hydrogen peroxide (H 2 O 2 ) synthesis directly from H 2 and O 2 is a strongly desired reaction for green processes. Herein a highly efficient palladium–tellurium (Pd–Te/TiO 2 ) catalyst with a selectivity of nearly 100 % toward H 2 O 2 under mild conditions (283 K, 0.1 MPa, and a semi‐batch continuous flow reactor) is reported. The size of Pd particles was remarkably reduced from 2.1 nm to 1.4 nm with the addition of Te. The Te‐modified Pd surface could significantly weaken the dissociative activation of O 2 , leading to the non‐dissociative hydrogenation of O 2 . Density functional theory calculations illuminated the critical role of Te in the selective hydrogenation of O 2 , in that the active sites composed of Pd and Te could significantly restrain side reactions. This work has made significant progress on the development of high‐selectivity catalysts for the direct synthesis of H 2 O 2 at ambient pressure.