化学
催化作用
氨生产
工作职能
吸附
活化能
Atom(片上系统)
纳米颗粒
工作(物理)
氨
化学工程
费米能级
纳米技术
合金
化学物理
物理化学
热力学
有机化学
材料科学
电极
物理
嵌入式系统
电子
工程类
量子力学
计算机科学
作者
Yangyu Zhang,Xuanbei Peng,Jinxiu Deng,Fuxiang Sun,Jihui Cai,Yanliang Zhou,Jun Ni,Bingyu Lin,Lirong Zheng,Xiuyun Wang,Jianxin Lin,Lilong Jiang
标识
DOI:10.1016/j.jcat.2021.10.019
摘要
The desire of green ammonia (NH3) production requires efficient catalysts that could operate at mild conditions. However, the activity of catalysts is restricted by scaling relation that low activation energy of N2 is in conjunction with the over-strong affinity of intermediates, which blocks adsorption sites of catalyst and hinders NH3 production. Single atom alloy (SAA) is an efficient approach to circumvent this relation. In the present work, we offer a feasible strategy of preparing M1Ru (M = Fe, Co, Ni) SAA. Our studies show that Co1Ru SAA has the highest NH3 synthesis rate and the largest TOFRu value among M1Ru SAA. Compared with CoRu nanoparticle alloy (NPA), Co1Ru SAA has stronger electronic interaction between Co and Ru, which induces lower work function and up-shift d band center toward Fermi level for Co1Ru SAA, thus promoting N2 activation. Meanwhile, the unique SAA structure could effectively tune N2 activation pathway. Those findings make a contribution to the development of advanced catalysts for efficient NH3 synthesis at mild conditions.
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