文献类型：期刊文献

英文题名：Carbon-coated silica supported palladium for hydrogen production from formic acid - Exploring the influence of strong metal support interaction

作者：Guo, Jiangnan[1];Hu, Shuozhen[1];Gao, Zhaoqun[1];Zhang, Xinsheng[1];Sun, Shigang[2]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Xiamen Univ, Coll Chem & Chem Engn, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China

年份：2024

卷号：658

起止页码：468

外文期刊名：JOURNAL OF COLLOID AND INTERFACE SCIENCE

收录：;EI(收录号：20235215280309);WOS:【SCI-EXPANDED(收录号:WOS:001142782800001)】；

基金：This work is financially supported by the National Natural Science Foundation of China (Project 22005097) . The authors thank the Research Center of Analysis and Test of East China University of Science and Technology for the help with the characterization. The authors would like to thank the Shiyanjia lab ( www.shiyanjia.com ) for the XPS test and TPD test.

语种：英文

外文关键词：Hydrogen energy; Formic acid decomposition; Carbon coated silicon support; Electron deficiency; Pd0/PdO ratio

摘要：Hydrogen energy is one of the most promising energy carriers to solve the increasingly severe energy crisis. Formic acid decomposition (FAD) solves the storage and transportation problems of hydrogen gas since hydrogen can be produced from aqueous formic acid under mild conditions. To efficiently convert formic acid to hydrogen gas, chemical and structural modification of Pd nanoparticles or supports have been carried out, especially introducing the strong metal support interaction (SMSI). Herein, we synthesized core-shell structured SiO2@SC compounds as the supports to introduce SMIS to Pd/PdO nanoparticles. The relationship between FAD activity and SMSI is investigated. The SMSI between Pd/PdO nanoparticles and SiO2/SC is adjusted by altering the thickness of the carbon layer. The X-ray photoelectron spectroscopy shows that owing to the strong electronattracting ability SiO2 core contributes to leading the Pd0 active site in an electron-deficient state. The thickness of the carbon layer controls the ratio of Pd0/PdO, which enhances the anti-poisoning ability of the catalyst. Owing to the electron-deficient state of Pd0 and optimal ratio of Pd0/PdO, the hydrogen desorption rate of FAD on Pd is enhanced, and the turn over frequency of Pd/SiO2@SC-1:3 catalyst reaches 1138 h-1, which is ten times higher than that of the pristine Pd/SC catalyst. These results are believed to guide the design and development of highly active Pd-based catalysts for hydrogen generation via FAD.