Electronic promoter or reacting species? The role of LiNH2 on Ru in catalyzing NH3 decomposition

被引：47

作者：

Guo, Jianping ^{[1
,2
]}

Chen, Zheng ^{[3
,4
]}

Wu, Anan ^{[3
,4
]}

Chang, Fei ^{[1
,2
]}

Wang, Peikun ^{[1
,2
]}

Hu, Daqiang ^{[1
]}

Wu, Guotao ^{[1
]}

Xiong, Zhitao ^{[1
]}

Yu, Pei ^{[1
,2
]}

Chen, Ping ^{[1
,5
]}

机构：

[1] Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[3] Xiamen Univ, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China

[4] Xiamen Univ, Coll Chem & Chem Engn, Xiamen 361005, Peoples R China

[5] Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

来源：

CHEMICAL COMMUNICATIONS | 2015年 / 51卷 / 82期

基金：

中国国家自然科学基金;

关键词：

COX-FREE HYDROGEN; AMMONIA DECOMPOSITION; RUTHENIUM CATALYST; LITHIUM IMIDE; GENERATION; STORAGE; CESIUM; POTASSIUM; NITRIDES; BARIUM;

D O I：

10.1039/c5cc04645a

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

LiNH2 decomposes to NH3 rather than N-2 and H-2 because of a severe kinetic barrier in NHx (x = 1, 2) coupling. In the presence of Ru, however, a drastic enhancement in N-2 and H-2 formation is obtained, which enables the LiNH2-Ru composite to act as a highly active catalyst for NH3 decomposition. Experimental and theoretical investigations indicate that Li creates a NHx-rich environment and Ru mediates the electron transfer facilitating NHx coupling. A strategy in catalytic material design is thus proposed.

引用

页码：15161 / 15164

页数：4

共 50 条

[1] The first-principles investigation on the electronic structure and mechanism of LiH + NH3 → LiNH2 + H2 reaction
Lan, Zhiqiang
Jiang, Weiqing
Bai, Jiadong
Guo, Jin
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2012, 37 (24) : 18937 - 18943
[2] The influence of density functional approximations on the description of LiH + NH3 → LiNH2 + H2 reaction
Bonnet, Marie-Laure
Tognetti, Vincent
CHEMICAL PHYSICS LETTERS, 2011, 511 (4-6) : 427 - 433
[3] LOCALIZED ORBITAL STUDY OF BOND PROPERTIES IN LINH+3, LINH2 AND LI2NH
HINCHLIFFE, A
CHEMICAL PHYSICS LETTERS, 1977, 45 (01) : 88 - 91
[4] ELECTRONIC-STRUCTURE AND SPECTRA OF [RU(NH3)(5)PYZ](2+) AND [(NH3)(5)RU-PYZ-RU(NH3)(5)](4+)
SIZOVA, OV
IVANOVA, NV
BARANOVSKII, VI
NIKOLSKII, AB
JOURNAL OF STRUCTURAL CHEMISTRY, 1994, 35 (04) : 433 - 442
[5] Highly efficient Ru/MgO catalysts for NH3 decomposition:: Synthesis, characterization and promoter effect
Zhang, J
Xu, HY
Ge, QJ
Li, WZ
CATALYSIS COMMUNICATIONS, 2006, 7 (03) : 148 - 152
[6] Decomposition of NH3 on Ru(11(2)over-bar1)
Dietrich, H
Jacobi, K
Ertl, G
SURFACE SCIENCE, 1996, 352 : 138 - 141
[7] Catalytic decomposition of NH3 on heated Ru and W surfaces
Umemoto, Hironobu
Kashiwagi, Yuta
Ohdaira, Keisuke
Kobayashi, Hiroyuki
Yasui, Kanji
THIN SOLID FILMS, 2011, 519 (14) : 4429 - 4431
[8] Kinetics of NH3 decomposition over well dispersed Ru
Bradford, MCJ
Fanning, PE
Vannice, MA
JOURNAL OF CATALYSIS, 1997, 172 (02) : 479 - 484
[9] Metastable excited state and electronic structure of [Ru(NH3)5NO]3+ and [Ru(NH3)4-(OH)NO]2+
Da Silva, SC
Franco, DW
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY, 1999, 55 (7-8) : 1515 - 1525
[10] THE ADSORPTION AND DECOMPOSITION OF NH3 ON SI(100) - DETECTION OF THE NH2(A) SPECIES
DRESSER, MJ
TAYLOR, PA
WALLACE, RM
CHOYKE, WJ
YATES, JT
SURFACE SCIENCE, 1989, 218 (01) : 75 - 107

← 1 2 3 4 5 →