Nano-engineered hexagonal PtCuCo nanocrystals with enhanced catalytic activity for ethylene glycol and glycerol electrooxidation

Zhai, Chunyang; Hu, Jiayue; Gao, Haifeng; Zeng, Lixi; Xue, Mianqiang; Liu, Zhao‐Qing; Zhu, Mingshan

doi:10.1016/j.jtice.2018.08.023

Cited by 15 publications

(11 citation statements)

References 45 publications

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“…High-resolution transmission electron microscopy (HRTEM) images (Figure ) exhibited that these particles were polyhedra terminated with (111) facets, which was confirmed by fast Fourier transform (FFT) patterns (Figure b,c, insets), and the lattice spacing was approximately 0.220 nm corresponding to a face-centered cubic (fcc) Pt structure. The lattice contraction was caused by the entry of smaller Cu and Co atoms into the Pt lattice, suggesting alloy formation. − Many edges, corners, and twin boundaries existed in the nanosurface of small polyhedra. Furthermore, these interconnected polyhedra assembled by facet attachment and fusion (Figure ), which would be proven by the intermediates, such as discrete nanopolyhedra and assemblies of several nanopolyhedra, as shown in Figure S1, that were captured in a shorter synthesis time, thus leading to many flexible grain boundaries in the mode of triangular boundaries.…”

Section: Resultsmentioning

confidence: 99%

“…Recent reports show that the mass activity of methanol in acidic medium can be boosted to 4.11 A mg –1 Pt on ternary PtCuCo nanoframes performed on a rotating ring-disk electrode at a rotation speed of 2500 rpm . Although different ternary PtCuCo nanostructures prepared as effective electrocatalysts for fuel cells have been reported, − among Pt-based smart nanostructures, ultrathin one-dimensional (1D) nanostructures as highly efficient electrocatalysts for fuel cells have received a great deal of attention due to their unique structure owning many merits − such as fast electron transportation and mass transfer and a self-supporting nature that can resist aggregation compared with isolated zero-dimensional (0D) particles; there has been no report on 1D polyhedron-assembled PtCuCo nanostructures thus far.…”

Section: Introductionmentioning

confidence: 99%

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Polyhedron-Assembled Ternary PtCuCo Nanochains: Integrated Functions Enhance the Electrocatalytic Performance of Methanol Oxidation at Elevated Temperature

Luo

Fang

Xie

et al. 2019

ACS Appl. Mater. Interfaces

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Recently, the preparation of a high-performance one-dimensional alloy nanostructure for fuel cells has been given increasing attention due to its smart-structure merits and electronic effect triggered by alloying different kinds of metals at the nanoscale. In this study, unique ternary PtCuCo nanochains assembled with small polyhedra are first achieved and used as high-performance anode electrocatalysts toward methanol oxidation at elevated temperature (60 °C) that is closer to the operating temperature of direct methanol fuel cells than room temperature. The specific activity/mass activity of Pt45Cu35Co20 one-dimensional nanochains can reach up to 18.24 mA cm–2/4.19 A mg–1 Pt that is 9.25/10.47 times that of commercial Pt black in sulfuric acid medium. After a 3600 s durability test, the remaining current density of Pt45Cu35Co20 one-dimensional nanochains is 73.3 times that of commercial Pt black. The structure characterizations show that the high density of surface active sites, d-band center of the Pt downshift, moderate strain effect, and synergetic effect are jointly responsible for the enhanced electrocatalytic performance of one-dimensional ternary PtCuCo nanochains.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Polyhedron-Assembled Ternary PtCuCo Nanochains: Integrated Functions Enhance the Electrocatalytic Performance of Methanol Oxidation at Elevated Temperature

Luo

Fang

Xie

et al. 2019

ACS Appl. Mater. Interfaces

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“…As illustrated in Figure 12, many nanocatalysts with novel structures have been synthesized [7,85,148–154] . Nanostructured catalysts (e. g. nano‐dendrites, [91,155] nano‐flowers) possess not only a higher specific surface area, but also the preferential growth on certain crystal planes.…”

Section: Electrocatalysts For Enhanced Efficiency and Selectivity Of mentioning

confidence: 99%

An Overview of Glycerol Electrooxidation Mechanisms on Pt, Pd and Au

Harrington

2021

ChemSusChem

100

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lower pH reduces the amount of carboxylates and favors the CÀ C bond scission. A reaction mechanism is proposed in this review, in which the generation of side products are directly from glycerol ("competition" between each side product) rather than from the further oxidation of C2/C3 products. Additionally, GEOR results and associated interpretations for Ni electrodes are presented, as well as a brief review on the performances of multi-metallic electrocatalysts (most of which are nanocatalysts) as an introduction to these future research hotpots.

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“…After many cycles, the optimized trimetallic catalyst's retained mass activity was still higher than others, indicating superior stability with no noticeable changes in morphology, size, and structure. Zhai et al 188 synthesized hexagonal Pt-Cu-Co nanocrystals for GOR. The hexagonal structure of Pt-Cu-Co provided high ESCA and strengthened the electronic effects, which favorable to electrocatalytic performance.…”

Section: Development Of Pt-based and Pdbased Catalyst In Trimetallic Alloymentioning

confidence: 99%

Research and innovation in the electrocatalyst development toward glycerol oxidation reaction

2021

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Direct glycerol fuel cell (DGFCs) is an interesting type of fuel cell that can produce energy and high-end chemicals using excess and less expensive fuel, glycerol. The commercialization of DGFCs meets with many challenges, especially on its catalyst development. Common catalysts usually tested in DGFCs are platinum-based (Pt) and palladium-based catalyst (Pd). The expensive value of the noble metal such as Pt and Pd becomes a limitation towards the commercialization. This review shows and summarizes numerous improvements achieved on the anode catalyst for GOR to reduce the noble metal dependency while maximizing the activity performance, durability-stability, and GOR yield selectivity on certain valuable chemicals introducing multiple optimized syntheses methods with timesaving and cost-effective benefits. Finally, this review proposes the next direction of catalyst development to be taken in the future based on the recent developments and innovations implemented and tested.

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Nano-engineered hexagonal PtCuCo nanocrystals with enhanced catalytic activity for ethylene glycol and glycerol electrooxidation

Cited by 15 publications

References 45 publications

Polyhedron-Assembled Ternary PtCuCo Nanochains: Integrated Functions Enhance the Electrocatalytic Performance of Methanol Oxidation at Elevated Temperature

Polyhedron-Assembled Ternary PtCuCo Nanochains: Integrated Functions Enhance the Electrocatalytic Performance of Methanol Oxidation at Elevated Temperature

An Overview of Glycerol Electrooxidation Mechanisms on Pt, Pd and Au

Research and innovation in the electrocatalyst development toward glycerol oxidation reaction

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