Extrasmall Ligand-Free Pt Nanoparticles as Dual-Function Catalysts for Methanol-Assisted Water Splitting Systems

Lu, Linfang; Gu, Yuelin; Guo, Weiyi; Li, Yunxia

doi:10.1021/acsanm.2c00175

Cited by 9 publications

(3 citation statements)

References 56 publications

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“…Herein, we will be discussing different advances made in the development of metal-based electrocatalysts for HER and OER reactions. The most widely investigated metal nanoparticles for electrocatalytic water splitting and fuel cell applications are based on noble metals like Pt, Ru, Ir, etc. − Different processes and strategies have been developed to improve the electrocatalytic activity and stability of these noble metal-based electrocatalysts. Different strategies have been developed which include controlling the morphology, size, crystal shape, structure, catalyst support, and surface ligands of the developed metal catalysts.…”

Section: Advances In Nanodimensional Metals and Metal Oxides As Catal...mentioning

confidence: 99%

Review on Metals and Metal Oxides in Sustainable Energy Production: Progress and Perspectives

et al. 2023

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The exponential population growth on earth has put an enormous strain on energy resources, which come in various forms like fossil fuels, geothermal energy, and so on. Currently, fossil fuels are fulfilling most of our energy requirements. However, their nonrenewable nature and the production of toxic and greenhouse gases have forced the research community to explore different renewable and nontoxic energy resources. Among different renewable energy resources, hydrogen is considered an important alternative energy source. However, the production of hydrogen (H 2 ) from water is a nonspontaneous process. Therefore, different processes like photocatalysis and photoelectrocatalysis are employed to carry out the water splitting. For these processes, there is a dire need to develop different substances that can act as catalysts. For energy applications, different metals (particularly noble metals) and metal oxides (mostly transition metal oxides) have shown promising catalytic applications in the past decade. Herein, we discuss the progress made in the synthesis of metal and metal oxide nanostructures, followed by a discussion regarding the advances made in the application of these nanostructures as photocatalysts, electrocatalysts, and photoelectrocatalysts. From an energy application standpoint, it is found that doping and heterostructure development are the most advantageous methods used to date to improve the efficiency of metal and metal oxide nanostructures. Also, the development of dye-sensitized metal oxide catalysts for energy applications is considered a powerful method to develop highly efficient photocatalysts and electro-/photoelectrocatalysts. Finally, the limitations and challenges facing the practical application of these nanostructures are also discussed.

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Section: Advances In Nanodimensional Metals and Metal Oxides As Catal...mentioning

confidence: 99%

Review on Metals and Metal Oxides in Sustainable Energy Production: Progress and Perspectives

et al. 2023

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“…This methodology uses the synthesis procedure without the complication of ligands (covering agents or surfactants). According to the literature [18][19][20], using the ligand renders incomplete exposure of catalytically active sites. It inhibits efficient contact between nanoparticles and support and influences the catalytic reactions, impairing their catalytic activity.…”

Section: Introductionmentioning

confidence: 99%

Pd-Ni-B/C Nanocatalysts for Electrochemical Oxidation of Ethanol in Alkaline Media

Ribeiro¹,

Silva²,

Salazar‐Banda³

et al. 2023

Catal Res

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This paper describes the synthesis of Pd0.70-Nix-By nanoparticles (x:y = 0.30:0, 0:0.30, 0.25:0.05, 0.20:0.10, 0.15:0.15, and 0.10:0.20) supported on carbon Vulcan XC-72 R by the chemical reduction method using ethylene glycol as a reducing agent for the study of the electrochemical oxidation of ethanol in alkaline media. Neither surfactants nor templates were used during the syntheses. The catalysts were physically characterized by transmission electron microscopy that showed the formation of nanoparticles with diameters of approximately 3 nm. Analyses of X-ray dispersive energy spectroscopy coupled with scanning electron microscopy identified the presence of the synthesized metals in concentrations close to the nominal ones. The electrochemical study was performed by CO-stripping, cyclic voltammetry, chronoamperometry, and steady-state polarization curves. The catalytic efficiency was also evaluated against the oxidation of CO, which is the principal intermediate adsorbed on the surface of catalysts during ethanol oxidation. The Pd0.70Ni0.15B0.15/C catalyst showed the lowest oxidation onset potentials for both CO (0.37 V) and ethanol oxidation (0.51 V) compared with the Pd/C catalyst (0.63 V and 0.64 V). Chronoamperometric tests also revealed that the Pd0.70Ni0.15B0.15/C catalyst displayed current densities four times higher than those of the Pd/C catalyst, probably because of the electronic and geometric effect that favors the removal of intermediate species from the catalyst surface. The synthesized ternary catalysts were more efficient toward the electrochemical oxidation of ethanol in alkaline media than Pd0.7Ni0.3/C and Pd/C catalysts. Thus, the synergistic effect of boron on the structure of binary nanoparticle catalysts supported on carbon for use in direct alcohol fuel cells was demonstrated for the first time.

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“…[1][2][3][4][5] Currently, Pt is regarded as the best monometallic catalyst for both anode and cathode reactions (i.e., the methanol oxidation reaction (MOR) and oxygen reduction reaction (ORR)). [6][7][8][9][10] However, the low activity and stability of Pt are the two most important problems restricting the successful industrial application of DMFC. In the past several decades, people have applied various techniques to improve the activity of Pt catalysts, such as alloying/de-alloying, [11][12][13][14] tailoring the morphologies of nanomaterials, [15][16][17][18] and replacing new supports.…”

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confidence: 99%

Au-modified PtCu nanodendrites as a highly stable and active electrocatalyst

Guo

Bao

et al. 2023

Chem. Commun.

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Extrasmall Ligand-Free Pt Nanoparticles as Dual-Function Catalysts for Methanol-Assisted Water Splitting Systems

Cited by 9 publications

References 56 publications

Review on Metals and Metal Oxides in Sustainable Energy Production: Progress and Perspectives

Review on Metals and Metal Oxides in Sustainable Energy Production: Progress and Perspectives

Pd-Ni-B/C Nanocatalysts for Electrochemical Oxidation of Ethanol in Alkaline Media

Au-modified PtCu nanodendrites as a highly stable and active electrocatalyst

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