Electronic promoter or reacting species? The role of LiNH2 on Ru in catalyzing NH3 decomposition.
LiNH2 decomposes to NH3 rather than N2 and H2 because of a severe kinetic barrier in NHx (x = 1, 2) coupling. In the presence of Ru, however, a drastic enhancement in N2 and H2 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.
Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China. pchen@dicp.ac.cn.|University of Chinese Academy of Sciences, Beijing 100049, China.
Jianping
J
Guo
State Key Laboratory of Physical Chemistry of Solid Surfaces and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China. ananwu@xmu.edu.cn.
Zheng
Z
Chen
State Key Laboratory of Physical Chemistry of Solid Surfaces and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China. ananwu@xmu.edu.cn.
Anan
A
Wu
Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China. pchen@dicp.ac.cn.|University of Chinese Academy of Sciences, Beijing 100049, China.
Fei
F
Chang
Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China. pchen@dicp.ac.cn.|University of Chinese Academy of Sciences, Beijing 100049, China.
Peikun
P
Wang
Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China. pchen@dicp.ac.cn.
Daqiang
D
Hu
Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China. pchen@dicp.ac.cn.
Guotao
G
Wu
Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China. pchen@dicp.ac.cn.
Zhitao
Z
Xiong
Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China. pchen@dicp.ac.cn.|University of Chinese Academy of Sciences, Beijing 100049, China.
Pei
P
Yu
Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China. pchen@dicp.ac.cn.|State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
Ping
P
Chen