TY - JOUR
T1 - A New Molybdenum Nitride Catalyst with Rhombohedral MoS2 Structure for Hydrogenation Applications
AU - Wang, Shanmin
AU - Ge, Hui
AU - Sun, Shouli
AU - Zhang, Jianzhong
AU - Liu, Fangming
AU - Wen, Xiaodong
AU - Yu, Xiaohui
AU - Wang, Liping
AU - Zhang, Yi
AU - Xu, Hongwu
AU - Neuefeind, Joerg C.
AU - Qin, Zhangfeng
AU - Chen, Changfeng
AU - Jin, Changqin
AU - Li, Yongwang
AU - He, Duanwei
AU - Zhao, Yusheng
N1 - Publisher Copyright:
© 2015 American Chemical Society.
PY - 2015/4/15
Y1 - 2015/4/15
N2 - Nitrogen-rich transition-metal nitrides hold great promise to be the next-generation catalysts for clean and renewable energy applications. However, incorporation of nitrogen into the crystalline lattices of transition metals is thermodynamically unfavorable at atmospheric pressure; most of the known transition metal nitrides are nitrogen-deficient with molar ratios of N:metal less than a unity. In this work, we have formulated a high-pressure route for the synthesis of a nitrogen-rich molybdenum nitride through a solid-state ion-exchange reaction. The newly discovered nitride, 3R-MoN2, adopts a rhombohedral R3m structure, isotypic with MoS2. This new nitride exhibits catalytic activities that are three times more active than the traditional catalyst MoS2 for the hydrodesulfurization of dibenzothiophene and more than twice as high in the selectivity to hydrogenation. The nitride is also catalytically active in sour methanation of syngas with >80% CO and H2 conversion at 723 K. Our formulated route for the synthesis of 3R-MoN2 is at a moderate pressure of 3.5 GPa and, thus, is feasible for industrial-scale catalyst production.
AB - Nitrogen-rich transition-metal nitrides hold great promise to be the next-generation catalysts for clean and renewable energy applications. However, incorporation of nitrogen into the crystalline lattices of transition metals is thermodynamically unfavorable at atmospheric pressure; most of the known transition metal nitrides are nitrogen-deficient with molar ratios of N:metal less than a unity. In this work, we have formulated a high-pressure route for the synthesis of a nitrogen-rich molybdenum nitride through a solid-state ion-exchange reaction. The newly discovered nitride, 3R-MoN2, adopts a rhombohedral R3m structure, isotypic with MoS2. This new nitride exhibits catalytic activities that are three times more active than the traditional catalyst MoS2 for the hydrodesulfurization of dibenzothiophene and more than twice as high in the selectivity to hydrogenation. The nitride is also catalytically active in sour methanation of syngas with >80% CO and H2 conversion at 723 K. Our formulated route for the synthesis of 3R-MoN2 is at a moderate pressure of 3.5 GPa and, thus, is feasible for industrial-scale catalyst production.
UR - http://www.scopus.com/inward/record.url?scp=84927942300&partnerID=8YFLogxK
U2 - 10.1021/jacs.5b01446
DO - 10.1021/jacs.5b01446
M3 - Article
AN - SCOPUS:84927942300
SN - 0002-7863
VL - 137
SP - 4815
EP - 4822
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
IS - 14
ER -