PdRu alloy nanoparticles of solid solution in atomic scale: Size effects on electronic structure and catalytic activity towards electrooxidation of formic acid and methanol

Kang, Xiongwu; Miao, Kanghua; Guo, Zhiwei; Zou, Jiasui; Shi, Zhenqing; Lin, Zhongqin; Huang, Jie; Chen, Shaowei

doi:10.1016/j.jcat.2018.05.022

Cited by 34 publications

(13 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The catalytic activity of the catalysts is strongly dependent on the composition, shape [5] , surface and electronic structures. [6] Among these reported methods of engineering the Pt-based catalysts, alloying Pt with some other transition metal to make solid solution alloy catalysts [7] , heterostructured catalysts, core-shell structure, [8] is considered to be very promising. The catalysts with multi metal components is considered very promising to prepare high-performance catalysts due to the synergistic effect of the multi components, while the shape-controlled synthesis of this kind of catalysts, which can selectively expose the facets of the nano crystalline and remarkably modulate the catalytic activity of the catalysts, [9] remains a grand challenge.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of cube-shaped PtFeNiCuCo alloy catalyst towards high performance alkaline hydrogen evolution

Shi¹,

Gan

et al. 2022

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

The commercialization of hydrogen fuel cell technologies requires high-performance and low-cost catalysts for production of highly pure hydrogen from electrochemical water splitting. In this work, cube-shaped multicomponent alloy catalysts PtFeNiCu and PtFeNiCuCo supported on carbon nanotubes were synthesized by one-step wet chemical reduction method. Powder X-ray diffraction analysis and transmission electron microscope imply the successful synthesis of alloy catalysts. The particle size of PtFeNiCu and PtFeNiCuCo is determined to be around 12.6 nm. The impact of the Co-doping into the PtFeNiCu alloy on the structural defects and catalytic performance towards alkaline hydrogen evolution (HER) was explored. It is observed the Co-doping into PtFeNiCu alloy induces sufficient decrease of the crystalline size and enhancement of the microstrain and stacking defects, as revealed by the Williamson-Hall method. It was observed that the overpotential for PtFeNiCuCo at the current density of 10 mA/cm2 in 1 M KOH is only 27 mV and Tafel slope is 34.7 mVdec1, superior to that of PtFeNiCu and commercial Pt/C. Such enhanced electrocatalytic performance was ascribed to the extensile strain and surface defects induced by the Co-doping and the synergistic effect of Co and other metal elements.

show abstract

Section: Introductionmentioning

confidence: 99%

Synthesis of cube-shaped PtFeNiCuCo alloy catalyst towards high performance alkaline hydrogen evolution

Shi¹,

Gan

et al. 2022

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

show abstract

“…4 However, the weak adhesion and activation effects of H 2 O on the adjacent Pt sites require a high oxidation potential necessarily, resulting in a huge loss of electrocatalytic activity within hundreds of seconds. 5,6 Alternatively, alloying Pt with oxophilic metals (like Ru, 7 Fe, 8 Co, 9 Zn, 10 etc.) is considered as a reasonable choice to achieve superior CO tolerance according to the bifunctional mechanism.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Beyond that, the previous analysis calculated from the density functional theory (DFT) also showed that the catalytic activity of Pt-based electrocatalysts toward methanol oxidation reaction (MOR) predominantly hinged on the elimination of the intermediate CO adsorbed on Pt atoms . However, the weak adhesion and activation effects of H 2 O on the adjacent Pt sites require a high oxidation potential necessarily, resulting in a huge loss of electrocatalytic activity within hundreds of seconds. , Alternatively, alloying Pt with oxophilic metals (like Ru, Fe, Co, Zn, etc.) is considered as a reasonable choice to achieve superior CO tolerance according to the bifunctional mechanism .…”

Section: Introductionmentioning

confidence: 99%

Photoassisted Reduction Synthesis of Pt@SnO₂/Graphene Catalysts with Excellent Activities toward Methanol Oxidation

et al. 2021

View full text Add to dashboard Cite

Photoassisted reduction, as an indispensable supplement to traditional chemical reduction, is a significant technique for regulating the interfacial interaction of active substances in the hybrid electrocatalysts toward methanol oxidation reaction (MOR). In this work, the well-hierarchical heterostructure of Pt@SnO 2 / graphene was successfully developed through the usage of the first hydrothermal and subsequent ultraviolet light (UV) excitation process. It was found that Pt particles with an average diameter size of 2.41 nm could be effectively trapped on the surface of semiconducting SnO 2 nanocrystals (NCs). Besides, the small SnO 2 NCs with an even distribution provided great opportunities for the accessible regulation from UV irradiation, thus endowing them with high contents of oxygen vacancies, broadened valence band, and inseparably interfacial effect that contributed to the improvement of electrical conductivity for the composite catalysts. Benefitting from the synergistic effect from each component, the obtained catalysts not only displayed a large electrochemically active surface area (ECSA) value of 80.7 m 2 g −1 and excellent mass activity of 1833.6 mA mg −1 but also showed desirable long-term durability and poisoning tolerance. For the further enhancement of electrochemical performance, electro-photo synergistic catalysis was also adopted by employing UV during the electrochemical measurements.

show abstract

“…Currently, palladium (Pd) and Pd-based nanomaterials are generally recognized as promising electrocatalysts, which have drawn attention for applications in DFAFC because of their excellent antipoisoning capacity and low oxidation overpotentials. , However, with regard to the practical application of Pd and Pd-based electrocatalysts in DFAFC, there are some important disadvantages that need to be resolved, for example, improvement of the electrocatalyst stability, enhancement of catalytic activity, and reduction of Pd dosage. − To overcome these issues, researchers are focusing on developing Pd alloys with earth-abundant materials (Fe, Bi, Ni, Au, Ru, Cu, Co, and Ag) to further increase the catalytic performance of electrocatalysts with high surface areas and to decrease the cost of electrocatalysts. ,− Moreover, shape-controlled Pd alloys show high catalytic activity due to their large surface areas. , For example, Xiong et al reported Pt 4 PdCu 0.4 nanoframes with a maximized number of active sites, generated by a multistep reaction, for highly effective formic acid oxidation (FAO) . Tang et al have designed porous half-shell Pd 3 Pt with abundant active sites for FAO .…”

Section: Introductionmentioning

confidence: 99%

Coral-like PdCu Alloy Nanoparticles Act as Stable Electrocatalysts for Highly Efficient Formic Acid Oxidation

Zheng

Zeng

Tan

et al. 2019

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

The direct formic acid fuel cell (DFAFC), with its high energy conversion efficiency, high energy density, rapid startup at room temperature, and other excellent features, is considered one of the most promising sources of green energy. Here, corallike PdCu bimetallic nanoparticles with large surface areas were successfully designed and fabricated via a simple approach and were used as an efficient electrocatalyst for formic acid oxidation (FAO). Introduction of Cu atoms into coral-like PdCu bimetallic nanoparticles not only affects the d-band centers of active sites by enhancing the catalytic performance but can also adjust the morphology to provide increased specific surface area. In addition, the electrocatalytic activity of the obtained PdCu/C was well optimized in FAO by tuning the composition of the metallic elements and the ratio of catalyst supports. The optimal electrocatalyst has an electrochemically active area of 36.34 m 2 g −1 and a mass activity of 1.05 A g Pd −1 , which are approximately 2 and 3.5 times higher than the values from commercial Pd/C, respectively. Most importantly, the chronoamperometry curve remained above 60% after 400 s, which is dramatically increased compared with Pd/C (<2.5%), illustrating the high stability of the PdCu bimetallic nanoparticle catalyst.

show abstract

PdRu alloy nanoparticles of solid solution in atomic scale: Size effects on electronic structure and catalytic activity towards electrooxidation of formic acid and methanol

Cited by 34 publications

References 38 publications

Synthesis of cube-shaped PtFeNiCuCo alloy catalyst towards high performance alkaline hydrogen evolution

Synthesis of cube-shaped PtFeNiCuCo alloy catalyst towards high performance alkaline hydrogen evolution

Photoassisted Reduction Synthesis of Pt@SnO₂/Graphene Catalysts with Excellent Activities toward Methanol Oxidation

Coral-like PdCu Alloy Nanoparticles Act as Stable Electrocatalysts for Highly Efficient Formic Acid Oxidation

Contact Info

Product

Resources

About

PdRu alloy nanoparticles of solid solution in atomic scale: Size effects on electronic structure and catalytic activity towards electrooxidation of formic acid and methanol

Cited by 34 publications

References 38 publications

Synthesis of cube-shaped PtFeNiCuCo alloy catalyst towards high performance alkaline hydrogen evolution

Synthesis of cube-shaped PtFeNiCuCo alloy catalyst towards high performance alkaline hydrogen evolution

Photoassisted Reduction Synthesis of Pt@SnO2/Graphene Catalysts with Excellent Activities toward Methanol Oxidation

Coral-like PdCu Alloy Nanoparticles Act as Stable Electrocatalysts for Highly Efficient Formic Acid Oxidation

Contact Info

Product

Resources

About

Photoassisted Reduction Synthesis of Pt@SnO₂/Graphene Catalysts with Excellent Activities toward Methanol Oxidation