Color center-richγ-Al_(2)O_(3)promotes propane dehydrogenation  

作　　者：Yu Wang Xiang Wang Mengfei Qiao Qingyuan Wu Kunlong Liu Xiaodong Yi Ruixuan Qin Gang Fu Nanfeng Zheng 

机构地区：[1]State Key Laboratory for Physical Chemistry of Solid Surfaces,Collaborative Innovation Center of Chemistry for Energy Materials,and Department of Chemistry,College of Chemistry and Chemical Engineering,Xiamen University,Xiamen 361005,China [2]Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province(IKKEM),Xiamen 361102,China [3]Key Laboratory of the Ministry of Education for Advanced Catalysis Materials,College of Chemistry and Material Sciences,Zhejiang Normal University,Jinhua 321004,China

出　　处：《Science China Chemistry》2024年第12期4134-4141,共8页中国科学（化学英文版）

基　　金：supported from the National Key R&D Program of China(2022YFA1504500);the National Natural Science Foundation of China(92261207,21890752,and 22202164)for financial support;support from the Natural Science Foundation of Fujian Province(2023J05006);the Fujian Provincial Chemistry Discipline Alliance;the Fundamental Research Funds for the Central Universities(20720230002)。

摘　　要：The Pt Sn/Al_(2)O_(3)catalyst is commonly used in commercial propane dehydrogenation(PDH)processes,but it faces challenges in the deactivation and periodic regeneration due to metal aggregation and coke deposition at high temperatures.Although Al_(penta)^(3+)has been proven to be beneficial for enhancing catalytic stability,bottom-up synthesis protocols usually restrict their applications.Here,a facile post-treatment approach using acetic acid was applied to create color centers(electrons trapped within oxygen vacancies)onγ-Al_(2)O_(3).Notably,the content of Al_(penta)^(3+)was enriched to 18.3%.Then,the pre-established Pt Sn clusters were loaded.The electrons facilitated the formation of ultrafine Pt Sn nanoparticles(~2 nm),and the Al_(penta)^(3+)sites prevented the sintering of Pt Sn by constructing the strong Al_(penta)^(3+)–O–Sn bonds.Furthermore,the catalytic durability of the catalyst prepared by conventional impregnation methods was remarkably extended from 186 h for the color center-free sample to 1,000 h using the HAc–Al_(2)O_(3)support.This facile post-modification was further successfully extended to commercial Al_(2)O_(3)pellets without altering their mechanical properties,highlighting its potential in industrial applications.

关 键 词：catalytic stability pentacoordinate Al^(3+) PtSn catalyst metal-support interaction mechanical strength 

分 类 号：O621.251[理学—有机化学]