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Visualizing the Stoichiometry of Industrial‐Style Co‐Mo‐S Catalysts with Single‐Atom Sensitivity 下载免费PDF全文
Yuanyuan Zhu Quentin M. Ramasse Michael Brorson Poul G. Moses Lars P. Hansen Christian F. Kisielowski Stig Helveg 《Angewandte Chemie (International ed. in English)》2014,53(40):10723-10727
The functional properties of transition metal dichalcogenides (TMDs) may be promoted by the inclusion of other elements. Here, we studied the local stoichiometry of single cobalt promoter atoms in an industrial‐style MoS2‐based hydrotreating catalyst. Aberration‐corrected scanning transmission electron microscopy and electron energy loss spectroscopy show that the Co atoms occupy sites at the (?100) S edge terminations of the graphite‐supported MoS2 nanocrystals in the catalyst. Specifically, each Co atom has four neighboring S atoms that are arranged in a reconstructed geometry, which reflects an equilibrium state. The structure agrees with complementary studies of catalysts that were prepared under vastly different conditions and on other supports. In contrast, a small amount of residual Fe in the graphite is found to compete for the S edge sites, so that promotion by Co is strongly sensitive to the purity of the raw materials. The present single‐atom‐sensitive analytical method therefore offers a guide for advancing preparative methods for promoted TMD nanomaterials. 相似文献
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Inside Cover: Electronic Metal–Support Interactions in Single‐Atom Catalysts (Angew. Chem. Int. Ed. 13/2014) 下载免费PDF全文
Pingping Hu Zhiwei Huang Dr. Zakariae Amghouz Prof. Michiel Makkee Fei Xu Prof. Freek Kapteijn Dr. Alla Dikhtiarenko Yaxin Chen Dr. Xiao Gu Prof. Xingfu Tang 《Angewandte Chemie (International ed. in English)》2014,53(13):3284-3284
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Inside Back Cover: Self‐Supporting Metal–Organic Layers as Single‐Site Solid Catalysts (Angew. Chem. Int. Ed. 16/2016) 下载免费PDF全文
Lingyun Cao Zekai Lin Fei Peng Weiwei Wang Ruiyun Huang Prof. Cheng Wang Prof. Jiawei Yan Jie Liang Prof. Zhiming Zhang Teng Zhang Prof. Lasheng Long Prof. Junliang Sun Prof. Wenbin Lin 《Angewandte Chemie (International ed. in English)》2016,55(16):5097-5097
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Inside Back Cover: Single‐Molecule Mechanochemical Sensing Using DNA Origami Nanostructures (Angew. Chem. Int. Ed. 31/2014) 下载免费PDF全文
Dr. Deepak Koirala Prakash Shrestha Tomoko Emura Kumi Hidaka Shankar Mandal Prof. Dr. Masayuki Endo Prof. Dr. Hiroshi Sugiyama Prof. Dr. Hanbin Mao 《Angewandte Chemie (International ed. in English)》2014,53(31):8251-8251
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Back Cover: Integrated Transmission Electron and Single‐Molecule Fluorescence Microscopy Correlates Reactivity with Ultrastructure in a Single Catalyst Particle (Angew. Chem. Int. Ed. 1/2018) 下载免费PDF全文
Frank C. Hendriks Sajjad Mohammadian Dr. Zoran Ristanović Dr. Sam Kalirai Dr. Florian Meirer Prof. Dr. Eelco T. C. Vogt Dr. Pieter C. A. Bruijnincx Prof. Dr. Hans C. Gerritsen Prof. Dr. Bert M. Weckhuysen 《Angewandte Chemie (International ed. in English)》2018,57(1):360-360
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Inside Back Cover: Patternable Large‐Scale Molybdenium Disulfide Atomic Layers Grown by Gold‐Assisted Chemical Vapor Deposition (Angew. Chem. Int. Ed. 5/2014) 下载免费PDF全文
Intek Song Chibeom Park Misun Hong Jaeyoon Baik Hyun‐Joon Shin Hee Cheul Choi 《Angewandte Chemie (International ed. in English)》2014,53(5):1449-1449
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