Redispersion of Mo-Based Catalysts and the Rational Design of Super Small-Sized Metallic Mo Species

被引：66

作者：

Chen, Jiayi ^{[1
]}

Wang, Haiyan ^{[1
]}

Wang, Zhe ^{[1
]}

Mao, Shanjun ^{[1
]}

Yu, Jian ^{[2
,3
]}

Wang, Yong ^{[1
,2
,3
]}

机构：

[1] Zhejiang Univ, Dept Chem, Adv Mat & Catalysis Grp, Inst Catalysis, Hangzhou 310028, Zhejiang, Peoples R China

[2] Zhejiang Univ, Ctr Electron Microscopy, Hangzhou 310027, Zhejiang, Peoples R China

[3] Zhejiang Univ, Sch Mat Sci & Engn, State Key Lab Silicon Mat, Hangzhou 310027, Zhejiang, Peoples R China

来源：

ACS CATALYSIS | 2019年 / 9卷 / 06期

基金：

中国国家自然科学基金; 国家重点研发计划;

关键词：

nanoparticle catalyst; redispersion; small-sized molybdenum species; carbon cloth; NRR; ELECTRON-MICROSCOPY; NANOPARTICLES; EFFICIENT; HYDROGEN; PARTICLES; INTERFACE; PHASE; ACID;

D O I：

10.1021/acscatal.8b04634

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Supported metal nanoparticle catalysts are one of the most important classes of heterogeneous catalysts but suffer from agglomeration in many cases. Particle redispersion is of great importance for restoring the activity. We report this phenomenon happening at Mo catalysts, in which small-sized Mo species can be achieved from the original large-sized Mo oxide on a carbon support (carbon cloth) in H-2 atmosphere. Detailed characterizations of the specific process were done with ex situ and in situ techniques. Additionally, the small-sized Mo species expose a large number of active sites, which exhibit a high Faradaic efficiency (FE) in the electrocatalytic nitrogen reduction reaction (NRR) under ambient conditions. Our discovery of the formation process of small-sized Mo species gives more deep understanding of the redispersion phenomenon and provides potential application in industry.

引用

页码：5302 / 5307

页数：11

共 33 条

[1] ELECTRON-MICROSCOPY OF SUPPORTED METAL PARTICLES .2. FURTHER-STUDIES OF PT-TIO2 [J].