Design of Single Gold Atoms on Nitrogen‐Doped Carbon for Molecular Recognition in Alkyne Semi‐Hydrogenation

Lin, Rui‐Biao; Albani, Davide; Fako, Edvin; Kaiser, Selina K.; Safonova, Оlga V.; López, Núria; Pérez‐Ramírez, Javier

doi:10.1002/anie.201805820

Cited by 124 publications

(102 citation statements)

References 33 publications

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“…Nevertheless, carbon supported Au is relatively rarely studied. One of the reasons for this is the difficulty of synthesizing highly dispersed (<3 nm) gold nanoparticles with a narrow particle size distribution [4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Hydrogen Production from Formic Acid over Au Catalysts Supported on Carbon: Comparison with Au Catalysts Supported on SiO2 and Al2O3

et al. 2019

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Characteristics and catalytic activity in hydrogen production from formic acid of Au catalysts supported on porous N-free (Au/C) and N-doped carbon (Au/N-C) have been compared with those of Au/SiO2 and Au/Al2O3 catalysts. Among the catalysts examined, the Au/N-C catalyst showed the highest Au mass-based catalytic activity. The following trend was found at 448 K: Au/N-C > Au/SiO2 > Au/Al2O3, Au/C. The trend for the selectivity in hydrogen production was different: Au/C (99.5%) > Au/Al2O3 (98.0%) > Au/N-C (96.3%) > Au/SiO2 (83.0%). According to XPS data the Au was present in metallic state in all catalysts after the reaction. TEM analysis revealed that the use of the N-C support allowed obtaining highly dispersed Au nanoparticles with a mean size of about 2 nm, which was close to those for the Au catalysts on the oxide supports. However, it was by a factor of 5 smaller than that for the Au/C catalyst. The difference in dispersion could explain the difference in the catalytic activity for the carbon-based catalysts. Additionally, the high activity of the Au/N-C catalyst could be related to the presence of pyridinic type nitrogen on the N-doped carbon surface, which activates the formic acid molecule forming pyridinium formate species further interacting with Au. This was confirmed by density functional theory (DFT) calculations. The results of this study may assist the development of novel Au catalysts for different catalytic reactions.

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Section: Introductionmentioning

confidence: 99%

Hydrogen Production from Formic Acid over Au Catalysts Supported on Carbon: Comparison with Au Catalysts Supported on SiO2 and Al2O3

et al. 2019

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“…AuN 4 : reprinted with permission from ref. ; copyright, 2019, Wiley‐VCH. B) Structure of ferric–superoxo intermediates of heme proteins (oxymyoglobin, HRP, and cytochrome P450).…”

Section: Applications Of Single‐atom Nanozymesmentioning

confidence: 99%

When Nanozymes Meet Single‐Atom Catalysis

et al. 2019

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Nanomaterials with enzyme‐like activities, coined nanozymes, have been researched widely as they offer unparalleled advantages in terms of low cost, superior activity, and high stability. The complex structure and composition of nanozymes has led to extensive investigation of their catalytic sites at an atomic scale, and to an in‐depth understanding of the biocatalysis occurring. Single‐atom catalysts (SACs), characterized by atomically dispersed active sites, have provided opportunities for mimicking metalloprotease and for bridging the gap between natural enzymes and nanozymes. In this Minireview, we illustrate the unique properties of nanozymes and we discuss recent advances in the synthesis, characterization, and applications of SACs. Subsequently, we outline the impressive progress made in single‐atom nanozymes and we discuss their applications in sensing, degradation of organic pollutants, and in therapeutic roles. Finally, we present the major challenges and opportunities remaining for a successful marriage of nanozymes and SACs.

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“…Dabei erstellen sie Struktur‐Funktions‐Beziehungen für chemische Prozesse auf verschiedenen Längen‐ und Zeitskalen. Pérez‐Ramírez und seine Gruppe waren vor kurzem zweimal auf dem Titelbild der Angewandten Chemie vertreten: mit Zuschriften über halogenbedingte Oberflächenbindung für die selektive Alkanfunktionalisierung zu Olefinen und über Goldatome auf stickstoffdotiertem Kohlenstoff für die Semihydrierung von Alkinen …”

Section: Ausgezeichnet …unclassified

Preise der North American Catalysis Society: J. Pérez‐Ramírez, E. Iglesia und A. Datye

2019

Angewandte Chemie

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Design of Single Gold Atoms on Nitrogen‐Doped Carbon for Molecular Recognition in Alkyne Semi‐Hydrogenation

Cited by 124 publications

References 33 publications

Hydrogen Production from Formic Acid over Au Catalysts Supported on Carbon: Comparison with Au Catalysts Supported on SiO2 and Al2O3

Hydrogen Production from Formic Acid over Au Catalysts Supported on Carbon: Comparison with Au Catalysts Supported on SiO2 and Al2O3

When Nanozymes Meet Single‐Atom Catalysis

Preise der North American Catalysis Society: J. Pérez‐Ramírez, E. Iglesia und A. Datye

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