Enhanced activity of bimetallic Pd-Ni nanoparticles on KIT-6 for production of hydrogen from dodecahydro-N-ethylcarbazole

被引:22
作者
Feng, Zhaolu [1 ]
Bai, Xuefeng [1 ,2 ,3 ]
机构
[1] Harbin Engn Univ, Coll Mat Sci & Chem Engn, Harbin 150001, Peoples R China
[2] Heilongjiang Univ, Sch Chem & Mat Sci, Harbin 150080, Peoples R China
[3] Heilongjiang Acad Sci, Inst Petrochem, Harbin 150040, Peoples R China
关键词
Liquid organic hydrogen carrier; Ultrasound; Bimetallic Pd-Ni catalysts; Dodecahydro-N-ethylcarbazole; Hydrogen production; CATALYTIC DEHYDROGENATION; HETEROAROMATIC-COMPOUNDS; SELECTIVE HYDROGENATION; CARRIER LOHC; STORAGE; KINETICS; ZEOLITE; DECOMPOSITION; IMPREGNATION; REDUCTION;
D O I
10.1016/j.fuel.2022.125473
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
The development of catalysts with excellent dehydrogenation performance is the key to solving the problem of slow dehydrogenation and high temperature in the liquid organic hydrogen carrier hydrogen storage cycle. The bimetallic Pd-Ni/K6 catalyst was prepared by inorganometallic chemistry adsorption (ICA) and ultrasonic -assisted isopropanol reduction. Pd(NH3)(4)(2+)and Ni(2+)will be anchored at the location of silanol groups (Si-OH) on the surface of KIT-6 (K6) by ICA, which prevents the aggregation of bimetallic Pd-Ni nanoparticles (NPs) during ultrasonic reduction. The HADDF-STEM results showed that Pd-Ni NPs with an average particle size of 2.1 nm were uniformly dispersed on the K6 surface. Pd-Ni alloy structure was found in Pd4Ni1/K6, and there was obvious electron transfer from Ni to Pd. The small Pd-Ni NPs, the electronic interaction of bimetallic Pd-Ni NPs, and the lattice defects caused by the Pd-Ni alloy enhance the activity of Pd4Ni1/K6 for H12-NEC dehydrogenation. At 180?C, the hydrogen productivity over Pd4Ni1/K6 is 1.7 times higher than that of Pd/K6. The complexation of Pd and Ni with O of Si-OH stabilized Pd-Ni NPs and prevented their agglomeration and leaching. Pd4Ni1/K6 showed excellent cycle stability, and the dehydrogenation efficiency remained above 90 % after 5 cycles.
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页数:11
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