文献类型：期刊文献

英文题名：Partial positively charged Pt in Pt/MgAl2O4 for enhanced dehydrogenation activity

作者：Tuo, Yongxiao[1,2];Meng, Ying[2];Chen, Chen[2];Lin, Dong[2];Feng, Xiang[2];Pan, Yuan[2];Li, Ping[3];Chen, De[2,4];Liu, Zhanning[1];Zhou, Yan[1];Zhang, Jun[1,2]

机构：[1]China Univ Petr East China, Sch Mat Sci & Engn, 66 West Changjiang Rd, Qingdao 266580, Shandong, Peoples R China;[2]China Univ Petr East China, State Key Lab Heavy Oil Proc, 66 West Changjiang Rd, Qingdao 266580, Shandong, Peoples R China;[3]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[4]Norwegian Univ Sci & Technol, Dept Chem Engn, N-7491 Trondheim, Norway

年份：2021

卷号：288

外文期刊名：APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY

收录：;EI(收录号：20210909982858);WOS:【SCI-EXPANDED(收录号:WOS:000632996500004)】；

基金：This work was partially supported by the Taishan Scholar Project of Shandong Province, the National Natural Science Foundation of China (No. 21805308), the Key Research and Development Project of Shandong Province (No. 2019GSF109075), and the Fundamental Research Funds for the Central Universities (No. 18CX06065A, No. 20CX06022A).

语种：英文

外文关键词：Pt/MgAl2O4; Partial positively charged Pt; Naphthalene adsorption; Edge Pt sites; Metal-support interactions

摘要：Platinum group metals hold pronounced potential for the dehydrogenation process of liquid organic hydrogen carriers (LOHCs) such as decalin, but the strong adsorption of dehydrogenation product has suppressed the moving forward of these catalysts. Herein, we described that the strong interactions between Pt and MgAl2O4 trigger partial positively charged Pt, which mitigates the adsorption of naphthalene on highly active Pt sites, thus achieving an outstanding decalin dehydrogenation activity that is nearly twice that of state-of-the-art Pt/CNF catalysts. As revealed by various characterization outcomes and DFT calculations, the strong electronic interactions between Pt and spinel oxygen surface resulted in partial positively charged Pt on MgAl2O4, which inhibits the electron transfer from Pt to unsaturated carbon of naphthalene, thus weakening the bond strength between Pt and naphthalene. As a result, the combination of small-sized Pt nanoparticles and facile desorption of products endows tremendous dehydrogenation activity of Pt/MgAl2O4. This study may shed new light on the rational construction of highly efficient metal catalysts for the application of LOHCs.