Promoting the Direct H2 O2 Generation Catalysis by Using Hollow Pd-Sn Intermetallic Nanoparticles

Junbo Zhang; Qi Shao; Ying Zhang; Shuxing Bai; Yonggang Feng; Xiaoqing Huang

doi:10.1002/smll.201703990

Promoting the Direct H₂ O₂ Generation Catalysis by Using Hollow Pd-Sn Intermetallic Nanoparticles

Small. 2018 Apr;14(16):e1703990. doi: 10.1002/smll.201703990. Epub 2018 Mar 13.

Authors

Junbo Zhang¹, Qi Shao¹, Ying Zhang¹, Shuxing Bai¹, Yonggang Feng¹, Xiaoqing Huang¹

Affiliation

¹ College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Jiangsu, 215123, China.

PMID: 29533013
DOI: 10.1002/smll.201703990

Abstract

Although direct hydrogen (H₂ ) oxidation to hydrogen peroxide (H₂ O₂ ) is considered as a promising strategy for direct H₂ O₂ synthesis, the desirable conversion efficiency remains formidable challenge. Herein, highly active and selective direct H₂ oxidation to H₂ O₂ 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 H₂ oxidation to H₂ O₂ can be optimized well with the hollow Pd₂ Sn NPs/P25 exhibiting H₂ O₂ 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 Pd₂ Sn NPs/P25 is due to its higher content of metallic Pd and higher ratio of Sn^x⁺ , which benefit H₂ O₂ production and selectivity.

Keywords: hollow; hydrogen peroxide; intermetallic; palladium; tin.