Highly Active Ruthenium Catalyst Supported on Barium Hexaaluminate for Ammonia Decomposition to COx-Free Hydrogen

被引：108

作者：

Wang, Ziqing ^{[1
,2
]}

Cai, Zhifeng ^{[2
]}

Wei, Zhong ^{[1
]}

机构：

[1] Shihezi Univ, Sch Chem & Chem Engn, Key Lab Green Proc Chem Engn Xinjiang Bingtuan, Shihezi 832003, Peoples R China

[2] Chinese Acad Sci, Chengdu Inst Organ Chem, Chengdu 610041, Sichuan, Peoples R China

来源：

ACS SUSTAINABLE CHEMISTRY & ENGINEERING | 2019年 / 7卷 / 09期

关键词：

Barium hexaaluminate; Ru catalyst; NH3; decomposition; Hydrogen production; Electron density; RU CATALYST; NH3; DECOMPOSITION; H-2; PRODUCTION; GENERATION; NANOPARTICLES; PROMOTION; OXIDATION; SURFACES; KINETICS; ECONOMY;

D O I：

10.1021/acssuschemeng.8b06308

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Barium hexaaluminate (BHA) obtained from a reverse micro-emulsion-mediated route is used as a support for Ru nanoparticles to catalyze the NH3 decomposition reaction, and the relationships between the structure and the catalytic performance over Ru/BHA have been disclosed based on the results of various characterization techniques. Ru/BHA is found to be the most active catalyst among all of the tested Ru catalysts supported on conventional MgO, Al2O3, and CNTs used commonly in NH3 decomposition. Moreover, the activation energy over Ru/BHA is 65.0 kJ/mol; this value is about 1/2 of that for Ru/Al2O3 (121.7 kJ/mol) and Ru/MgO (102.8 kJ/mol). It is also found that the presence of electronic interactions between Ru and BHA would improve the electron density and enhance the rate of recombinative desorption of nitrogen over the Ru surface, leading to excellent catalytic activity. Additionally, alleviation of hydrogen poisoning is also preferable for ammonia decomposition.

引用

页码：8226 / 8235

页数：19

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