Pt<sub>3</sub>Co Octapods as Superior Catalysts of CO<sub>2</sub> Hydrogenation

Khan, Munir Ullah; Wang, Liangbing; Liu, Zhao; Gao, Zehua; Wang, Shenpeng; Li, Hongliang; Zhang, Wenbo; Wang, Menglin; Wang, Zhengfei; Ma, Chao; Zeng, Jie

doi:10.1002/anie.201602512

Cited by 180 publications

(132 citation statements)

References 53 publications

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“…[12] Unfortunately, such high applied potential also causes Cu electrochemical migration, dissolution, and redeposition that sinter the Cu NPs. [3][4][5]7,12,14,15] Since the study showing a linear correlation between grain boundary (GB) density and CO 2 RR performance by Li et al, [16] GBs have been explored as highly active catalytic sites for both CO 2 RR and carbon monoxide reduction, which promoted the production of CO and formic acid. Numerous chemical modifications and nanostructuring approaches have led to improvements in product selectivity and catalytic activity.…”

Section: Doi: 101002/adma201805405mentioning

confidence: 99%

A Highly Active Star Decahedron Cu Nanocatalyst for Hydrocarbon Production at Low Overpotentials

et al. 2018

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The electrochemical carbon dioxide reduction reaction (CO2RR) presents a viable approach to recycle CO2 gas into low carbon fuels. Thus, the development of highly active catalysts at low overpotential is desired for this reaction. Herein, a high‐yield synthesis of unique star decahedron Cu nanoparticles (SD‐Cu NPs) electrocatalysts, displaying twin boundaries (TBs) and multiple stacking faults, which lead to low overpotentials for methane (CH4) and high efficiency for ethylene (C2H4) production, is reported. Particularly, SD‐Cu NPs show an onset potential for CH4 production lower by 0.149 V than commercial Cu NPs. More impressively, SD‐Cu NPs demonstrate a faradaic efficiency of 52.43% ± 2.72% for C2H4 production at −0.993 ± 0.0129 V. The results demonstrate that the surface stacking faults and twin defects increase CO binding energy, leading to the enhanced CO2RR performance on SD‐Cu NPs.

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Section: Doi: 101002/adma201805405mentioning

confidence: 99%

A Highly Active Star Decahedron Cu Nanocatalyst for Hydrocarbon Production at Low Overpotentials

et al. 2018

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“…[3] To enhance the efficiency of energy conversion, rational design of highly active and robust electrocatalysts to strengthen the adsorption and activation of inert CO 2 is important, which can be boosted by the fundamental understanding of the correlations between structure and proper-ties. [4] To this end, numerous studies have focused on the understanding of the size,f acet, and alloying effects in electrochemical reduction of CO 2 . [5] Surface strain, which is generally generated by the lattice mismatch between different kinds of compositions and some twin structures like icosahedra, is present extensively in heterogeneous catalysts.…”

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confidence: 99%

Understanding of Strain Effects in the Electrochemical Reduction of CO₂: Using Pd Nanostructures as an Ideal Platform

et al. 2017

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Tuning the surface strain of heterogeneous catalysts represents a powerful strategy to engineer their catalytic properties by altering the electronic structures. However, a clear and systematic understanding of strain effect in electrochemical reduction of carbon dioxide is still lacking, which restricts the use of surface strain as a tool to optimize the performance of electrocatalysts. Herein, we demonstrate the strain effect in electrochemical reduction of CO by using Pd octahedra and icosahedra with similar sizes as a well-defined platform. The Pd icosahedra/C catalyst shows a maximum Faradaic efficiency for CO production of 91.1 % at -0.8 V versus reversible hydrogen electrode (vs. RHE), 1.7-fold higher than the maximum Faradaic efficiency of Pd octahedra/C catalyst at -0.7 V (vs. RHE). The combination of molecular dynamic simulations and density functional theory calculations reveals that the tensile strain on the surface of icosahedra boosts the catalytic activity by shifting up the d-band center and thus strengthening the adsorption of key intermediate COOH*. This strain effect was further verified directly by the surface valence-band photoemission spectra and electrochemical analysis.

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“…As shown in Figure a, the first desorption peak could originate from physisorbed or weakly chemisorbed CO 2 , whereas the second peak was associated with strongly chemisorbed CO 2 . The peak position of CO 2 desorption was the highest for NSCNW‐3, suggesting that the CO 2 adsorption strength was largest on the NSCNW‐3 . As shown in Figure b, the Nyquist plots revealed that the NSCNW‐3 exhibited a smaller semicircle radius compared with the other catalysts, indicating the facilitated charge‐transfer process between the catalysts and electrolyte.…”

Section: Resultsmentioning

confidence: 92%

Electrochemical Reduction of CO₂ to CO by N,S Dual‐Doped Carbon Nanoweb Catalysts

et al. 2019

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Converting CO2 into useful chemicals through an electrocatalytic process is an attractive solution to reduce CO2 in the atmosphere. However, the process suffers from high overpotential, low activity, or poor product selectivity. In this study, N,S dual‐doped carbon nanoweb (NSCNW) materials were proposed as an efficient nonmetallic electrocatalyst for CO2 reduction. The NSCNW catalysts preferentially and rapidly converted CO2 into CO with a high Faradaic efficiency of 93.4 % and a partial current density of −5.93 mA cm−2 at a low overpotential of 490 mV. A small Tafel slope value (93 mV dec−1) was obtained, demonstrating a high rate for CO2 reduction. Moreover, the catalysts also exhibited a quite stable current‐density profile during 20 h with a high CO Faradaic efficiency above 90 % throughout the electrolysis reaction. The high catalytic performance of the catalysts for CO2 reduction could be attributed to synergistic effects associated with the structural advantages of 3 D carbon nanoweb structures and effective S doping of the carbon materials with the highest ratio of thiophene‐like S to oxidized S species.

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Pt₃Co Octapods as Superior Catalysts of CO₂ Hydrogenation

Cited by 180 publications

References 53 publications

A Highly Active Star Decahedron Cu Nanocatalyst for Hydrocarbon Production at Low Overpotentials

A Highly Active Star Decahedron Cu Nanocatalyst for Hydrocarbon Production at Low Overpotentials

Understanding of Strain Effects in the Electrochemical Reduction of CO₂: Using Pd Nanostructures as an Ideal Platform

Electrochemical Reduction of CO₂ to CO by N,S Dual‐Doped Carbon Nanoweb Catalysts

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Pt3Co Octapods as Superior Catalysts of CO2 Hydrogenation

Cited by 180 publications

References 53 publications

A Highly Active Star Decahedron Cu Nanocatalyst for Hydrocarbon Production at Low Overpotentials

A Highly Active Star Decahedron Cu Nanocatalyst for Hydrocarbon Production at Low Overpotentials

Understanding of Strain Effects in the Electrochemical Reduction of CO2: Using Pd Nanostructures as an Ideal Platform

Electrochemical Reduction of CO2 to CO by N,S Dual‐Doped Carbon Nanoweb Catalysts

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Pt₃Co Octapods as Superior Catalysts of CO₂ Hydrogenation

Understanding of Strain Effects in the Electrochemical Reduction of CO₂: Using Pd Nanostructures as an Ideal Platform

Electrochemical Reduction of CO₂ to CO by N,S Dual‐Doped Carbon Nanoweb Catalysts