Precursor-mediated size tuning of monodisperse PtRh nanocubes as efficient electrocatalysts for ethylene glycol oxidation

Gao, Fei; Zhang, Yangping; Song, Pingping; Wang, Jin; Song, Tongxin; Wang, Cheng; Song, Li; Shiraishi, Yukihide; Du, Yukou

doi:10.1039/c9ta01071h

Cited by 85 publications

(25 citation statements)

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“…Two obvious peaks of each catalyst could be observed where the strong peak in the positive scan represented for the electrooxidation of EG molecule and the weak peak in the negative scan represented the intermediates oxidation process. [ 23 ] Similar to EOR measurements, the Pd 7 Ag NSs exhibited the highest mass activity of 7.01 A mg −1 , which is 1.28, 1.64, and 7.30 times higher than Pd 7 Pb NSs (5.47 A mg −1 ), Pd 7 Au NSs (4.27 A mg −1 ), and Pd/C (0.96 A mg −1 ). The specific activities are 14.1 mA cm −2 for Pd 7 Ag NSs, 11.9 mA cm −2 for Pd 7 Pb NSs, 9.5 mA cm −2 for Pd 7 Au NSs, and 2.4 mA cm −2 for Pd/C catalysts (Figure 6b).…”

Section: Resultssupporting

confidence: 57%

Universal Surfactant‐Free Strategy for Self‐Standing 3D Tremella‐Like Pd–M (M = Ag, Pb, and Au) Nanosheets for Superior Alcohols Electrocatalysis

Gao

Zhang

Ren

et al. 2020

Adv Funct Materials

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208

108

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2000255 (1 of 9) Pd-based nanosheet materials have emerged as efficient catalysts for monobasic and polyhydric alcohol oxidation reactions. However, most reported synthetic methods of Pd-based nanosheets (NSs) are nonuniversal and surfactant-involved, leading to residue-covered surfaces with drastically damaged electrocatalytic properties. Herein, a universal, surfactant-free, simple one-pot route is developed for the precise synthesis of a kind of novel self-standing Pd-M (M = Ag, Pb, Au, Ga, Cu, Pt, etc.) NSs with tremella-like superstructures are assembled using ultrathin two-dimensional (2D) NSs. Benefiting from the universal surfactant-free methods, the obtained Pd-M NSs exhibit clean surfaces and stable three-dimensional (3D) self-standing structures that overcome the difficulty of normal close packing and overlapping 2D NSs. The Pd-M (M = Ag, Pb, and Au) NSs with tremella-like structures all show excellent ethanol oxidation reaction (EOR) and ethylene glycol oxidation reaction (EGOR) properties. In particular, with the optimal superstructure, better electronic effect, and promoted toxicity tolerance, the EOR/EGOR mass activities of Pd 7 Ag NSs, Pd 7 Pb NSs, and Pd 7 Au NSs are 8.2/7.3, 7.2/5.7, and 5.3/4.4 times higher than that of commercial Pd/C catalysts. This advanced 3D construction also endows Pd-M NSs with more favorable stability than Pd/C. This study may be extended to Pd-M (M = other metals) NSs and open up more opportunities for broad catalytic applications.

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Section: Resultssupporting

confidence: 57%

Universal Surfactant‐Free Strategy for Self‐Standing 3D Tremella‐Like Pd–M (M = Ag, Pb, and Au) Nanosheets for Superior Alcohols Electrocatalysis

Gao

Zhang

Ren

et al. 2020

Adv Funct Materials

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208

108

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“…Transition-metal nanoparticles (TMNPs) have attracted much attention from homogeneous to heterogeneous catalysis, [1][2][3][4][5][6][7][8][9] and among them rhodium nanoparticles (RhNPs) have appeared especially reactive for key reactions for which Earth-abundant metals are not efficient or not sufficiently active catalysts. [10][11][12][13][14][15][16][17][18][19][20] Most RhNPs have so far been synthesized by NaBH4 reduction of RhCl3(H2O)n that also generates sodium borohydroxyhydride influencing catalysis in an undefined fashion. Here we report the synthesis of RhNPs generated by reduction of RhCl3 in water using the commercial reducing agent cobaltocene 21 in THF in stoichiometric amount.…”

Section: Introductionmentioning

confidence: 99%

High catalytic activity of Rh nanoparticles generated from cobaltocene and RhCl₃ in aqueous solution

Wang

Ciganda

Wang

et al. 2019

Inorg. Chem. Front.

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“…Moreover, they proposed that the Br − ions in TOAB are essential for lowering the total surface energy of the PtCu NCs. Most recently, our group successfully fabricated PtRh NCs of different sizes by changing the metal precursor (Figure d). The mean sizes of the large PtRh (PtRh‐L) and small PtRh (PtRh‐S) NCs were 10.5 and 5.5 nm, respectively.…”

Section: Three‐dimensional Nanostructuresmentioning

confidence: 99%

Section: Three‐dimensional Nanostructuresmentioning

confidence: 99%

Recent Achievements in Noble Metal Catalysts with Unique Nanostructures for Liquid Fuel Cells

Sun

2020

ChemSusChem

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In recent years, research efforts have been focused on the design and fabrication of highly efficient catalysts for liquid fuel cells, because the use of these cells is an important approach for alleviating environmental pollution and energy crises. However, the limitations of the catalytic performance of industrial Pt/C have strongly hindered the development of these fuel cells. The catalyst morphology has a strong impact on its performance; nanostructured catalysts are preferred as they offer large specific surface area and more exposed active centers. In view of this, many catalysts with unique structures have been synthesized in recent years, all of which show excellent catalytic performance characteristics. Despite these achievements, few efforts have been made to survey this field comprehensively. Herein, the recent advances in catalysts for liquid fuel cells are summarized, with a focus on noble metal catalysts with unique morphologies such as nanowires, nanosheets, and assembly structures. Their formation mechanisms are discussed critically. The relationship between the unique morphologies and excellent performance of these catalysts is also explored. This work may provide guidelines for the further development of liquid fuel cells.

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Precursor-mediated size tuning of monodisperse PtRh nanocubes as efficient electrocatalysts for ethylene glycol oxidation

Abstract: We firstly report a reliable method to synthesize PtRh-S and PtRh-L NCs with different size of 5.5 and 10.5 nm. PtRh-S NCs show much better electrochemical activity and stability than PtRh-L NCs and pure Pt NCs towards EGOR.

Cited by 85 publications

References 50 publications

Universal Surfactant‐Free Strategy for Self‐Standing 3D Tremella‐Like Pd–M (M = Ag, Pb, and Au) Nanosheets for Superior Alcohols Electrocatalysis

Universal Surfactant‐Free Strategy for Self‐Standing 3D Tremella‐Like Pd–M (M = Ag, Pb, and Au) Nanosheets for Superior Alcohols Electrocatalysis

High catalytic activity of Rh nanoparticles generated from cobaltocene and RhCl₃ in aqueous solution

Recent Achievements in Noble Metal Catalysts with Unique Nanostructures for Liquid Fuel Cells

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Precursor-mediated size tuning of monodisperse PtRh nanocubes as efficient electrocatalysts for ethylene glycol oxidation

Abstract: We firstly report a reliable method to synthesize PtRh-S and PtRh-L NCs with different size of 5.5 and 10.5 nm. PtRh-S NCs show much better electrochemical activity and stability than PtRh-L NCs and pure Pt NCs towards EGOR.

Cited by 85 publications

References 50 publications

Universal Surfactant‐Free Strategy for Self‐Standing 3D Tremella‐Like Pd–M (M = Ag, Pb, and Au) Nanosheets for Superior Alcohols Electrocatalysis

Universal Surfactant‐Free Strategy for Self‐Standing 3D Tremella‐Like Pd–M (M = Ag, Pb, and Au) Nanosheets for Superior Alcohols Electrocatalysis

High catalytic activity of Rh nanoparticles generated from cobaltocene and RhCl3 in aqueous solution

Recent Achievements in Noble Metal Catalysts with Unique Nanostructures for Liquid Fuel Cells

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High catalytic activity of Rh nanoparticles generated from cobaltocene and RhCl₃ in aqueous solution