2026-10-10T04:46:36Z https://api.figshare.com/v2/oai

oai:figshare.com:article/33777971 2026-09-15T08:13:48Z category_1 category_4 category_12 category_13 category_272 category_873 category_734 category_61 portal_63 item_type_2 month_year_09_2026

Unraveling the Structural Dynamics in Ammonia Synthesis over the Strontium Fluoride-Supported Ruthenium Catalyst Xiaohu Hu (2140201) Yifan Yan (6918017) Haolong Chang (24917765) Zhongliang Cao (20473317) Xuanbei Peng (4975250) Jiakai Wang (7408709) Xiaorou Cao (17897288) Yanru Wang (187231) Haoran Qian (4347949) Zhenjie Sun (9723659) Yangyu Zhang (4609117) Tianhua Zhang (3705301) Xi Wang (15032) Xiuyun Wang (49682) Xing Chen (140292) Langli Luo (1420771) Lilong Jiang (1639597) Jiannian Yao (1279926) Yongan Yang (1263948) Biophysics Biochemistry Cell Biology Genetics Environmental Sciences not elsewhere classified Chemical Sciences not elsewhere classified Biological Sciences not elsewhere classified Developmental Biology work may inspire developing practical catalysts advanced operando studies abundantly generated due understanding catalytic mechanisms driven cyclic reconstruction synthesis remain scarce supported ruthenium catalyst dynamic structural evolution 3 </ sub 2 </ sub γ +</ sup catalytic synthesis structural dynamics catalyst ’ utilizing multiple support interaction strontium fluoride situ techniques mild conditions lamellar nanostructures interface reconstruction identified mainly fluorine vacancy exceptional performance direct visualization chemical industry catalyst surface article elucidates also unravels The catalytic synthesis of ammonia (NH₃) is a cornerstone of the chemical industry. However, to date, direct visualization of the reactant-support interaction and the structural dynamics of catalyst surface/interfaces during efficient NH₃ synthesis remain scarce. Herein, this article elucidates the dynamic structural evolution of a previously unreported catalyst Ru/SrF₂ by utilizing multiple in situ techniques. The in situ environmental transmission electron microscopy technique not only visualizes the N₂/H₂ exposure-induced reversible surface rearrangement of SrF₂ from (100) to (111) with lamellar nanostructures but also unravels the reaction-driven cyclic reconstruction of the Ru/SrF₂ surface-interface under the N₂–H₂ mixture. The catalytically-active sites are identified mainly as the fluorine vacancy (V_F)-centered Ru⁰-V_F-Sr^γ+ perimeter sites. These sites are abundantly generated due to the recurring surface-interface reconstruction over Ru/SrF₂ and underlie the catalyst’s exceptional performance under mild conditions. This work may inspire more advanced operando studies for understanding catalytic mechanisms and developing practical catalysts. 2026-09-15T00:00:00Z Dataset Media 10.1021/jacs.6c12200.s002 https://figshare.com/articles/media/Unraveling_the_Structural_Dynamics_in_Ammonia_Synthesis_over_the_Strontium_Fluoride-Supported_Ruthenium_Catalyst/33777971 CC BY-NC 4.0