Two flowers per seed: Derivatives of CoG@F127/GO with enhanced catalytic performance of overall water splitting

Han, Yue; Qian, Chen; Wu, Huayu; Chen, Xing; Wu, Xinsheng; He, Wei; Yan, Hui; Li, Guisheng; Diao, Guowang; Chen, Ming

doi:10.1016/j.jechem.2020.06.051

Cited by 28 publications

(12 citation statements)

References 49 publications

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“…The unrivaled excellent properties of graphene and graphene oxide such as large surface area, high electrical conductivity, high potential adsorption power and good catalytic properties make them efficient materials for several applications, including supercapacitors, energy storage devices and electrochemical sensing [ 10 , 11 , 12 , 13 , 14 , 15 , 16 ]. In addition, silane-based materials have been reported previously to improve electrical conductivity and chemical stability of materials [ 17 , 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

Novel Aminosilane (APTES)-Grafted Polyaniline@Graphene Oxide (PANI-GO) Nanocomposite for Electrochemical Sensor

et al. 2021

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Lead is a potentially toxic element (PTE) that has several adverse medical effects in humans. Its presence in the environment became prominent due to anthropogenic activities. The current study explores the use of newly developed composite materials (organic–inorganic hybrid) based on PANI-GO-APTES for electrochemical detection of Pb2+ in aqueous solution. The composite material (PANI-GO-APTES) was synthesized by chemical method and was characterized with SEM, XPS, XEDS, XRD, TGA, FTIR, EIS and CV. The result of characterization indicates the successful synthesis of the intended material. The PANI-GO-APTES was successfully applied for electrochemical detection of Pb2+ using cyclic voltammetry and linear sweep voltammetry method. The limit of detection of Pb2+ was 0.0053 µM in the linear range of 0.01 µM to 0.4 µM. The current response produced during the electrochemical reduction of Pb2+ catalyzed by PANI-GO-APTES was also very repeatable, reproducible and rapid. The application of PANI-GO-APTES-modified GCE in real sample analysis was also established. Therefore, PANI-GO-APTES is presented as a potential Pb2+ sensor for environmental and human health safety.

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Section: Introductionmentioning

confidence: 99%

Novel Aminosilane (APTES)-Grafted Polyaniline@Graphene Oxide (PANI-GO) Nanocomposite for Electrochemical Sensor

et al. 2021

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“…As shown in Figure c, the Tafel slope of the V 2 O 5 –Co 2 P 2 O 7 catalyst is 82 mV dec –1 , which is the smallest in comparison to V 2 O 5 + Co 2 P 2 O 7 (228mV dec –1 ), Co 2 P 2 O 7 (330 mV dec –1 ), V 2 O 5 (448 mV dec –1 ), and bare CC (466 mV dec –1 ), revealing the fastest reaction kinetics of the V 2 O 5 –Co 2 P 2 O 7 catalyst. Furthermore, compared to the reported pyrophosphate electrocatalysts (Table S2), the V 2 O 5 –Co 2 P 2 O 7 catalyst exhibits a lower overpotential and moderate Tafel slope (Figure d). − ,,− ,− ,− …”

Section: Resultsmentioning

confidence: 87%

“…In the O 1s spectrum, the peaks of 531.09 and 532.56 eV are attributed to the M–O and P–O bonds (Figure e). However in the O 1s spectrum after reconstruction, the peak of P–O disappears, and two new peaks at 530.82 and 533.41eV belong to PO and P–O–P, while the peak of M–O moves to 531.84 eV, further confirming the phase evolution. P 2p exhibits an electron regulation process similar to that of V 2p, with P 2p 3/2 and P 2p 1/2 shifting from 132.99 and 133.86 eV to 133.1 and 133.97 eV before and after reconstruction (Figure f), respectively, P 2p 3/2 exhibited a positive shift of 0.11 eV, whereas the Co 2p 3/2 peak in after activation shows a negative shift of 1.52 eV compared to the initial state.…”

Section: Resultsmentioning

confidence: 87%

Electrochemically Reconstructed Vanadic Oxide-Doped Cobalt Pyrophosphate as an Electrocatalyst for the Oxygen Evolution Reaction

et al. 2023

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More and more attention has been paid to the development of the efficient electrocatalysts for the oxygen evolution reaction (OER). Herein, a porous vanadic oxide-doped cobalt pyrophosphate electrocatalyst, namely V2O5–Co2P2O7, was exploited by using the electrochemical reconstruction method in the alkaline electrolyte and selecting a cobalt vanadium phosphate Co(H2O)4(VOPO4)2 as a precursor. The reconstructed vanadic oxide-doped cobalt pyrophosphate catalyst V2O5–Co2P2O7 exhibited efficient electrocatalytic activity for the OER in 1.0 M KOH, requiring a low overpotential of 199 mV at 10 mA cm–2, compared to the reported pyrophosphate electrocatalysts. The porous morphology and doping of vanadic oxide after electrochemical reconstruction were beneficial to enhance the electrocatalytic performance for the OER, through improving the surface area to bring in more accessibly active sites and regulating the electronic structures. The results provided a promising strategy to prepare the pyrophosphate electrocatalysts and improve the performance of the OER catalyst.

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“…Oxides are the most promising because of their catalytic function and ease of synthesis. Conventionally, the major means of metal oxides (MOx) synthesis are solvo-thermal method 16 , electrochemical method 17 , chemical precipitation method 18 , hydrothermal method 19 , 20 , sputtering method, laser-deposition, chemical vapour deposition etc. However, lately solid-state synthesis of MOx is gaining much attention because of its ability to generate large surface area of nanoparticle, and less environmental footprint (solventless reaction).…”

Section: Introductionmentioning

confidence: 99%

Solid-state synthesis of CdFe2O4 binary catalyst for potential application in renewable hydrogen fuel generation

Asiri

Adeosun

Khan

et al. 2022

Sci Rep

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Clean energy is highly needed at this time when the energy requirements are rapidly increasing. The observed increasing energy requirement are largely due to continued industrialization and global population explosion. The current means of energy source is not sustainable because of several reasons, most importantly, environmental pollution and human health deterioration due to burning of fossil fuels. Therefore, this study develops a new catalyst for hydrogen and oxygen evolution by water splitting as a potential energy vector. The binary metal oxide catalyst CdFe2O4 was synthesized by the solventless solid-mechanical alloying method. The as-prepared catalyst was well characterized by several methods including field emission scanning electron microscopy (FESEM), X-ray diffraction spectroscopy (XRD), X-ray photoelectron spectroscopy (XPS), Fourier Transform infrared red spectroscopy (FTIR), energy dispersive X-ray spectroscopy (XEDS). The as-prepared catalyst, CdFe2O4 was successfully applied for water electrolysis at a moderate overpotential (470 mV). Specifically, the onset potential for the oxygen and hydrogen evolution reactions (OER and HER) were 1.6 V/RHE and 0.2 V/RHE respectively (vs. the reversible hydrogen electrode). The electrode potential required to reach 10 mA/cm-2 for OER (in alkaline medium) and HER (in acidic medium) was 1.70 V/RHE (corresponding to overpotential η = 0.47 and − 0.30 V/RHE (η = − 0.30 V) respectively. Similarly, the developed OER and HER catalyst displayed high current and potential stability for a period of 12 h. This approach is seen as the right track of making water electrolysis for hydrogen energy feasible through provision of low-energy requirement for the electrolytic process. Therefore, CdFe2O4 is a potential water splitting catalyst for hydrogen evolution which is a clean fuel and an antidote for world dependence on fossil fuel for energy generation.

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Two flowers per seed: Derivatives of CoG@F127/GO with enhanced catalytic performance of overall water splitting

Cited by 28 publications

References 49 publications

Novel Aminosilane (APTES)-Grafted Polyaniline@Graphene Oxide (PANI-GO) Nanocomposite for Electrochemical Sensor

Novel Aminosilane (APTES)-Grafted Polyaniline@Graphene Oxide (PANI-GO) Nanocomposite for Electrochemical Sensor

Electrochemically Reconstructed Vanadic Oxide-Doped Cobalt Pyrophosphate as an Electrocatalyst for the Oxygen Evolution Reaction

Solid-state synthesis of CdFe2O4 binary catalyst for potential application in renewable hydrogen fuel generation

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