Architecting the AuPt alloys for hydrazine oxidation as an anolyte in fuel cell: Comparative analysis of hydrazine splitting and water splitting for energy-saving H2 generation

Yu, Yiseul; Lee, Seung Jun; Theerthagiri, Jayaraman; Lee, Yeryeong; Choi, Myong Yong

doi:10.1016/j.apcatb.2022.121603

Cited by 164 publications

(87 citation statements)

References 55 publications

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“…Thus, an electrocatalyst that is inexpensive, abundant, highly stable, and efficient is required. Nonetheless, the major drawback of water electrolysis is the anodic OER process, which follows a four-electron transfer multistep uphill reaction, while the HER is a two-electron process. − Thus, the OER is considered a kinetically sluggish process. To counter this issue, the development of a highly stable and active electrocatalyst is necessary to lower the overpotential and increase the OER rate.…”

Section: Introductionmentioning

confidence: 99%

Dual-Cation-Coordinated CoFe-Layered Double-Hydroxide Nanosheets Using the Pulsed Laser Ablation Technique for Efficient Electrochemical Water Splitting: Mechanistic Screening by In Situ/Operando Raman and Density Functional Theory Calculations

et al. 2023

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Cation modulation engineering is employed to tune the intrinsic activity and electronic structure of electrocatalysts for water electrolysis. Here, we designed two-dimensional cobalt–iron-layered double-hydroxide (CoFe-LDH) ultrathin nanosheets by pulsed laser ablation in an aqueous medium. The CoFe-LDH nanosheets exhibited abundant electrochemically active sites and a large surface area. The optimal Co0.5Fe0.5-LDH exhibited a low overpotential of 270 mV during half-cell oxygen evolution reactions (OERs), whereas Co0.25Fe0.75-LDH delivered 365 mV at 10 mA/cm2 during hydrogen evolution reactions (HERs). The bifunctional electrocatalyst exhibited an outstanding water electrolyzer performance at a cell voltage of ∼1.89 V at 10 mA/cm2 and admirable stability for long-run repetitive cycles. The synergistic effect between the modulated cations resulted in better conductivity, and the mass transfer facilitated the HER and OER. We demonstrated that this facile approach can facilitate the engineering of a highly stable and efficient electrode for renewable electrochemical energy conversion reactions.

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Section: Introductionmentioning

confidence: 99%

Dual-Cation-Coordinated CoFe-Layered Double-Hydroxide Nanosheets Using the Pulsed Laser Ablation Technique for Efficient Electrochemical Water Splitting: Mechanistic Screening by In Situ/Operando Raman and Density Functional Theory Calculations

et al. 2023

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“…The two peaks with binding energy (BE) of 71.89 and 74.81 eV were attributed to Pt 0 , and the BE of 72.77 and 75.88 eV were attributed to Pt 2+ . It was also noteworthy that there was a weak peak at 75.32 eV presumably attributed to Pt-N/O-Ni or Pt-Ni [ 25 , 26 , 27 , 28 , 29 , 30 ], which further proved the formation of Pt-Ni alloy. Pires et al also reported a Pt-Ni bimetallic catalyst, and found that the Pt hydroxide and Pt oxide peaks were attributed to Pt-O-C or Pt-O-Ni bonds in the Pt 4f spectra, which suggested the Pt-C and Pt-Ni bonds and the formation of Pt-Ni alloy [ 30 ].…”

Section: Resultsmentioning

confidence: 98%

“…Combining the high activity of Pd metal and the high selectivity of Pt metal, Pt-Pd/Chitin bimetallic catalyst was designed, which was effective in improving the selectivity of 4-nitroethylbenzene ( Table 1 , entry 5), but also did not solve the problem of -NO 2 to NH 2 group by extending the reaction time ( Table 1 , entry 6). To further improve the selectivity of 4-nitroethylbenzene and taking into account the consideration of low cost, a series of bimetallic catalysts combining Pt with common non-precious metals (Fe, Co, Ni, Cu) were designed [ 15 , 23 , 24 , 25 , 26 ]. It could be seen that the Pt-Ni/Chitin bimetallic catalyst could achieve the best selectivity of 4-nitroethylbenzene with a yield of 99% in 3 h or even longer time ( Table 1 , entries 7–10).…”

Section: Resultsmentioning

confidence: 99%

“…To determine the morphology of the Pt-Ni NPs immobilized on chitin, transmission electron microscopy (TEM) was conducted, which further the proved the porous structure of chitin microspheres and revealed that the Pt-Ni NPs (catalyst of Pt-Ni/Chitin, Pt:Ni = 3:1 [mol%]) were uniformly distributed on the surface of the support without obvious aggregation ( Figure 3 e–g), and the average particle size of Pt-Ni NPs was about 2.1 nm (inset in Figure 3 e). Moreover, high resolution TEM (HR-TEM) images in Figure 3 g and Figure S4 showed that in a typical dark spot (i.e., nano-metal particle), clear lattices attributed to the Pt (111) (d = 0.223 nm) and Ni (111) (d = 0.203 nm) phases were observed [ 26 , 33 , 34 ], further suggesting the formation of Pt-Ni NPs, which was consistent with the results of XRD and XPS. Duan et al reported am Ag-Fe bimetallic catalyst and used it for degradation of 4-nitrophenol.…”

Section: Resultsmentioning

confidence: 99%

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Fabrication of Biomass Derived Pt-Ni Bimetallic Catalyst and Its Selective Hydrogenation for 4-Nitrostyrene

et al. 2022

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The hydrogenation products of aromatic molecules with reducible groups (such as C=C, NO2, C=O, etc.) are relatively critical intermediate compounds in fine chemicals, but how to accurately reduce only specific groups is still challenging. In this work, a bimetallic Pt-Ni/Chitin catalyst was prepared for the first time by using renewable biomass resource chitin as support. As the carrier, the chitin was constructed into porous nanofibrous microspheres through the sol-gel strategy, which was favorable for the adhesion of nano-metals and the exchange of reactive substances due to its large surface area, porous structure, and rich functional groups. Then the Pt-Ni/Chitin catalyst was applied to selective hydrogenation with the model substrate of 4-nitrostyrene. As the highly dispersed Pt-Ni NPs with abundant exposed active sites and the synergistic effect of bimetals, the Pt-Ni/Chitin catalyst could efficiently and selectively hydrogenate only NO2 or C=C with yields of ~99% and TOF of 660 h−1, as well as good stability. This utilization of biomass resources to build catalyst materials would be important for the green and sustainable chemistry.

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“…IPB Hydrazine is a hazardous chemical, used extensively in industrial applications, such as explosives, 1 corrosion inhibitors, 2 pesticides and herbicides, 3 rocket and aircraft propellants, 4 fuel cells, 5 catalysis, 6 emulsifiers, 7 and pharmaceutical compounds. 8 Furthermore, hydrazine and its derivatives are considered neurotoxin, 9 carcinogenic, 10 mutagenic, 11 and teratogenic 12 substances that can be absorbed by the human body, resulting in severe harm to the skin, 13 kidneys, 14 and liver.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Sensors Based on a Composite of Electrochemically Reduced Graphene Oxide and PEDOT:PSS for Hydrazine Detection

Rahman

Rafi

Putra³

et al. 2023

ACS Omega

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In this study, hydrazine sensors were developed from a composite of electrochemically reduced graphene oxide (ErGO) and poly (3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS), deposited onto a glassy carbon electrode (GCE). The structural properties, electrochemical characterization, and surface morphologies of this hydrazine sensor were characterized by Raman spectroscopy, Fourier transform infrared (FTIR) spectroscopy, electrochemical impedance spectroscopy (EIS), and scanning electron microscopy (SEM). In addition, the proposed hydrazine sensor also demonstrates good electrochemical and analytical performance when investigated using cyclic voltammetry (CV), differential pulse voltammetry (DPV), and amperometry techniques under optimal parameters. Using these investigated parameters, DPV and amperometry were chosen as techniques for hydrazine measurements and showed a linear range of concentration in the range of 0.2−100 μM. The obtained limits of detection and limits of quantitation for hydrazine measurements were 0.01 and 0.03 μM, respectively. In addition, the proposed sensor demonstrated good reproducibility and stability in hydrazine measurements in eight consecutive days. This fabricated hydrazine sensor also exhibited good selectivity against interference from Mg 2+ , K + , Zn 2+ , Fe 2+ , Na + , NO 2 − , CH 3 COO − , SO 4 2− , Cl − , ascorbic acid, chlorophenol, and triclosan and combined interferences, as well as it depicted %RSD values of less than 5%. In conclusion, this proposed sensor based on GCE modified with ErGO/PEDOT:PSS displays exceptional electrochemical performance for use in hydrazine measurements and have the potential to be employed in practical applications.

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Architecting the AuPt alloys for hydrazine oxidation as an anolyte in fuel cell: Comparative analysis of hydrazine splitting and water splitting for energy-saving H2 generation

Cited by 164 publications

References 55 publications

Dual-Cation-Coordinated CoFe-Layered Double-Hydroxide Nanosheets Using the Pulsed Laser Ablation Technique for Efficient Electrochemical Water Splitting: Mechanistic Screening by In Situ/Operando Raman and Density Functional Theory Calculations

Dual-Cation-Coordinated CoFe-Layered Double-Hydroxide Nanosheets Using the Pulsed Laser Ablation Technique for Efficient Electrochemical Water Splitting: Mechanistic Screening by In Situ/Operando Raman and Density Functional Theory Calculations

Fabrication of Biomass Derived Pt-Ni Bimetallic Catalyst and Its Selective Hydrogenation for 4-Nitrostyrene

Electrochemical Sensors Based on a Composite of Electrochemically Reduced Graphene Oxide and PEDOT:PSS for Hydrazine Detection

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