Strong metal-support interactions induced by an ultrafast laser

Zhang, Jian; Zhu, Dezhi; Yan, Jianfeng; Wang, Chang‐An

doi:10.1038/s41467-021-27000-5

Cited by 115 publications

(69 citation statements)

References 63 publications

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“…Likewise, the ultrafast laser was also applied in constructing SMSI in Pt/CeO 2 . [ 77 ] The laser promoted the formation of confined electric field in localized interface between Pt NPs and CeO 2 , which facilitates the formation of surface oxygen vacancies and the migration of metastable CeO x (Figure 7E). The effect on the catalyst performance was assessed by employing the CO oxidation as a model reaction.…”

Section: Understandings and Extensions Of Smsimentioning

confidence: 99%

“…[17,25] Considering the difficulty in characterizing such small amount of interfacial metalmetal bonds, the formation of encapsulation overlayer and the retarded adsorption ability have also been used as typical characteristics for confirming the formation of SMSI, which is now the prevailing view in this field. [71,77,83] In the meantime, the term "SMSI" has also been used improperly and misleadingly, and general metal-support interactions are regarded as "strong" interactions in a large number of cases. Herein, we advocate that "SMSI" should be used correctly and specifically.…”

Section: Conclusion and Perspectivementioning

confidence: 99%

“…E) Schematic illustration of the ultrafast laser-induced SMSI; F) the activity of different catalysts at varied temperatures in CO conversion reaction; G) CO conversion rates from 90 to 200 °C with 1st-10th cycles on laser-Pt/CeO 2 catalyst; H) The CO conversion efficiency varies with the reaction lives; I) HRTEM image of Pt/CeO 2 after reaction. Reproduced with permission [77]. Copyright 2021, Nature Research.…”

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confidence: 99%

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Strong Metal–Support Interaction in Heterogeneous Catalysts

Luo

Zhao

Pan

et al. 2022

Advanced Energy Materials

210

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too strong of a metal-support interaction would trigger Ostwald ripening, whereas too weak of that would lead to particle migration and coalescence. Therefore, the metal-support binding energy serves as a descriptor to predict the growth rates of supported NPs in this case. [14] Strong metal-support interaction (SMSI) is a special form of interaction that is typically observed between metal NPs and reducible supports. [15][16][17] In 1978, Tauster et al. first discovered that the chemisorption abilities of TiO 2 -supported Group VIII noble metals toward small gas molecules, such as CO and H 2 , suddenly disappeared after a reduction treatment at 500 °C. [15] In this case, the term SMSI was proposed to describe this phenomenon that was once believed to be caused by the electronic perturbation due to the formation of PtTi bond. [16,[18][19][20] Later, subsequent investigations confirmed the encapsulation of metal NPs by migrated support species. [21][22][23][24] In 1986, Sakellson et al. provided direct evidences of the SMSI in Rh-TiO 2 using extended X-ray absorption fine structure spectroscopy (EXAFS)-the RhTi bond formed between Rh NPs and TiO 2 support was apparently shorter than that in RhTi intermetallic compounds due to the cationic nature of Ti n+ in TiO 2 . [25] This highlights the meaning of "strong" in "SMSI". On that occasion, Tauster emphasized that the SMSI should be referred to as the formation of such strong interfacial metalmetal bonds rather than its subsequent consequences. [17] However, considering the difficulty in detecting the relatively small amounts of interfacial bonds in supported metal NPs, SMSI is still identified by the apparent change of physicochemical behaviors including encapsulation, loss of chemisorption ability, etc.Later, similar phenomena were observed when other reducible metal oxides were used as the supports including CeO 2 , [26,27] Nb 2 O 5 , [28,29] etc. Moreover, such a reduction-induced SMSI can be eliminated after oxidation treatment at elevated temperatures. Recently, the SMSI has been observed between some new components beyond the typical Group VIII noble metals and reducible metal oxide supports. [30][31][32] The development of advanced material characterization technologies, in situ high-resolution transmission electron microscopy (HRTEM) for example, [33][34][35][36] has also brought new insights into understanding SMSI behaviors. More importantly, owing to its intriguing behaviors, SMSI brings about new principles for designing and modulating advanced heterogeneous catalysts toward thermocatalysis and electrocatalysis. [27,[37][38][39] Meanwhile, it should also be noted that the concept of SMSI has been usedStrong metal-support interaction (SMSI) in supported metal catalysts, typically accompanied by the formation of encapsulation layers over metal nanoparticles, has drawn intense research attention owing to a variety of intriguing behaviors. In particular, recent years have witnessed enormous progress in constructing SMSI between novel components as well as...

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Section: Understandings and Extensions Of Smsimentioning

confidence: 99%

Section: Conclusion and Perspectivementioning

confidence: 99%

mentioning

confidence: 99%

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Strong Metal–Support Interaction in Heterogeneous Catalysts

Luo

Zhao

Pan

et al. 2022

Advanced Energy Materials

210

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“…Platinum-group-metals (PGMs) on oxide supports serve as active sites in heterogeneous catalysts with applications ranging from three-way catalysts to oil rening. [1][2][3][4][5][6][7][8] The cost and scarcity of PGMs require that the metals should be nely dispersed on oxide supports to maximize metal utilization efficiency. CeO 2 is a widely used support material, 9 because PGM dispersions of 100% can be obtained on CeO 2 .…”

Section: Introductionmentioning

confidence: 99%

Aggregation of CeO₂ particles with aligned grains drives sintering of Pt single atoms in Pt/CeO₂ catalysts

et al. 2022

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“…A variety of Bi coupled nanocomposites such as Bi/(BiO) 2 CO 3 [19,20], Bi-BiOI [21], Bi/g-C 3 N 4 [22], and Bi/ZnWO 4 [23] have been developed to perform their superior interfacial charge transfer kinetics and surface-reaction dynamics when competing with their individual phase. Indisputably, construction of strong metal-support interactions can profoundly influence the electronic structure and geometry of catalysts, which subsequently show a large impact on the catalytic performance [24,25]. Therefore, it is quite necessary to develop a new method to load the suitable co-catalysts on host species.…”

Section: Introductionmentioning

confidence: 99%

Engineering Noble Metal-like Bi onto Hierarchical SrWO4 for the Enhancement of Photocatalytic Activity

et al. 2022

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Solar-driven hydrogen production from water has attracted increasing attention due to sustainable H2 fuel generation with zero-emissions. However, the design of a photocatalyst without noble metals to enable efficient water splitting is still critical for practical applications. In this study, the hierarchical microspheres of SrWO4 assembled with well-defined metallic Bi nanoparticles were synthesized through mild hydrothermal aging. The resultant photocatalyst with optimum proportion exhibited the competitive performance of a high hydrogen-generation rate at 4.5 mmol·h−1·g−1, outperforming SrWO4 and Bi by factors of 2.0 and 2.4, respectively. Both the experimental characterization and active analysis revealed that the synergistic effect of noble metal-like behavior of Bi and their electron-sink capacity mainly contribute to boosting the overall photocatalytic efficiency. This work may provide advanced insights into the application of economical bismuth elements as co-catalysts, instead of noble metals, to improve photocatalytic efficiency in solar-fuel conversion and environmental remediation.

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Strong metal-support interactions induced by an ultrafast laser

Cited by 115 publications

References 63 publications

Strong Metal–Support Interaction in Heterogeneous Catalysts

Strong Metal–Support Interaction in Heterogeneous Catalysts

Aggregation of CeO₂ particles with aligned grains drives sintering of Pt single atoms in Pt/CeO₂ catalysts

Engineering Noble Metal-like Bi onto Hierarchical SrWO4 for the Enhancement of Photocatalytic Activity

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Strong metal-support interactions induced by an ultrafast laser

Cited by 115 publications

References 63 publications

Strong Metal–Support Interaction in Heterogeneous Catalysts

Strong Metal–Support Interaction in Heterogeneous Catalysts

Aggregation of CeO2 particles with aligned grains drives sintering of Pt single atoms in Pt/CeO2 catalysts

Engineering Noble Metal-like Bi onto Hierarchical SrWO4 for the Enhancement of Photocatalytic Activity

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Aggregation of CeO₂ particles with aligned grains drives sintering of Pt single atoms in Pt/CeO₂ catalysts