文献类型：期刊文献

英文题名：Nest-shaped hollow-encapsulated Pd catalyst enhances the catalytic performance of hydrogen peroxide directly synthesizing from hydrogen and oxygen

作者：Shi, Yongyong Jiang, Donghai Zhou, Liming Zhao, Jingyun Ma, Jun Lin, Qian Pan, Hongyan

第一作者：Shi, Yongyong

通信作者：Lin, Q[1];Pan, HY[1]

机构：[1]Guizhou Univ, Coll Chem & Chem Engn, Guiyang 550025, Guizhou, Peoples R China;[2]Guizhou Key Lab Green Chem & Clean Energy Technol, Guiyang 550025, Guizhou, Peoples R China;[3]Guizhou Inst Technol, Coll Chem Engn, Guiyang 550003, Peoples R China

第一机构：Guizhou Univ, Coll Chem & Chem Engn, Guiyang 550025, Guizhou, Peoples R China

通信机构：corresponding author), Guizhou Univ, Coll Chem & Chem Engn, Guiyang 550025, Guizhou, Peoples R China.

年份：2024

卷号：567

外文期刊名：MOLECULAR CATALYSIS

收录：;EI(收录号：20243516930612);Scopus(收录号：2-s2.0-85201786156);WOS:【SCI-EXPANDED(收录号:WOS:001301498200001)】；

基金：This work was financially supported by National Natural Science Foundation of China (Grant No.22068009) , National Natural Science Foundation of China (Grant No.22262006) , and Guizhou Provincial Science and Technology Projects (Grant No.QKHJC-ZK [2022] YB088) .

语种：英文

外文关键词：Pd catalyst; Embedded with Pd nanoparticles; Nest-shape hollow structure; Direct synthesis; Hydrogen peroxide

摘要：A well-defined structural morphology can significantly construct a special catalytic micro-reaction environment to enhance the catalytic performance of Pd catalyst in the direct synthesis of hydrogen peroxide from hydrogen and oxygen (DSHP). In this study, SiO2 2 was used as a rigid template, PdCl2 2 as the Pd precursor, and dopamine hydrochloride (DA) as the carbon and nitrogen source to synthesize a nest-shaped hollow-encapsulated Pd catalyst named PdMulti@ONHCS. Multi @ONHCS. This catalyst was successfully constructed via high-temperature pyrolysis of poly dimethyl diallyl ammonium chloride (PDDA), which generated a blasting effect crucial for this formation. Characterization analysis, catalytic performance evaluation experiment, and molecular dynamics simulation were conducted to explore the structure-performance relationship of PdMulti@ONHCS Multi @ONHCS catalyst in DSHP. Both experimental and simulation results consistently showed that the nest-shaped hollow structure of Pd Mul- ti @ONHCS catalyst created a distinctive catalytic microreactor environment with a spatial mass transfer constraint, which was not only conducive to adsorption and enrichment of H2 2 and O2 2 at Pd active sites to produce H2O2. 2 O 2 . In addition, the generated H2O2 2 O 2 can be desorbed from Pd active sites in time and rapidly diffused into the reaction solution, effectively inhibiting the dissociation of species containing O-O - O bonds on the Pd surface, resulting in severe hydrogenation and decomposition side reactions, and improving H2O2 2 O 2 productivity and selectivity.