CoFeP nanocube-arrays based on Prussian blue analogues for accelerated oxygen evolution electrocatalysis

Xiong, Dengke; Lü, Chunxiao; Chen, Chen; Wang, Jiang; Kong, Yuxuan; Liu, Tian; Ying, Shuanglu; Yi, Fei‐Yan

doi:10.1016/j.jpowsour.2021.230884

Cited by 30 publications

(14 citation statements)

References 50 publications

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“…The first two‐steps weightlessness can be due to the losses of water molecules on the surface of sample and crystal water molecules before 200 °C. The last weight loss of ∼21.6 % in the range of 250–350 °C is owing to the decomposition of cyanide, that is comparable to previous report about PBA materials [9] . Therefore, as‐prepared CeFe x Co 1−x ‐PBA precursors were calcined to synthesize corresponding metal oxides at above 350 °C in air atmosphere.…”

Section: Resultssupporting

confidence: 80%

“…The last weight loss of ~21.6 % in the range of 250-350 °C is owing to the decomposition of cyanide, that is comparable to previous report about PBA materials. [9] Therefore, as-prepared CeFe x Co 1À x -PBA precursors were calcined to synthesize corresponding metal oxides at above 350 °C in air atmosphere.…”

Section: Syntheses and Characterizationsmentioning

confidence: 99%

“…Among of them, OER is rate-determining step because of its high overpotential voltage during four-electron transfer process, that limits its wide application. [6][7][8][9][10] Some noble-metal materials like IrO 2 and RuO 2 belong to general OER electrocatalysts. However, they have shortcomings like high cost, weak stability and low abundance.…”

Section: Introductionmentioning

confidence: 99%

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Iron‐Cobalt‐Cerium Multimetallic Oxides Derived from Prussian Blue Precursors: Enhanced Oxygen Evolution Electrocatalysis

Kong

et al. 2023

ChemPlusChem

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Exploring non-precious metal-based electrocatalysts is still challenging in 21 st century. In this work, a series of hexagonal bipyramidal Ce-based PBA materials as precursors with different Fe/Co metal ratios, namely as CeFe x Co 1À x -PBA, are successfully constructed via co-precipitation method and converted into corresponding metal oxides (denoted as Fe x Co 1À x CeO y ) via thermal treatment. Then, they as electrocatalysts realize highly efficient oxygen evolution reaction (OER). Especially, as-synthesized Fe 0.7 Co 0.3 CeO y electrocatalyst shows very low overpoten-tials of 320 mV at the current density of 10 mA cm À 2 and the Tafel slop of 98.4 mV dec À 1 in 1 M KOH with remarkable durability for 24 h, which was due to the synergistic effect of multi-metal FeCoCe centers. Furthermore, a two-electrode cell of Fe 0.7 Co 0.3 CeO y /NF j j Pt/C/NF realizes outstanding overall water splitting with a voltage of only 1.71 V at 10 mA cm À 2 and remarkable long-term durability, that is even superior to benchmark IrO 2 /NF j j Pt/C/NF counterpart.

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Section: Resultssupporting

confidence: 80%

Section: Syntheses and Characterizationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Iron‐Cobalt‐Cerium Multimetallic Oxides Derived from Prussian Blue Precursors: Enhanced Oxygen Evolution Electrocatalysis

Kong

et al. 2023

ChemPlusChem

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“…As shown in Figure 4a, XPS spectrum of Fe 2p exhibits two peaks with the binding energies (BEs) of 711.5 and 724.8 eV, which can be related to Fe 2p3/2 and Fe 2p1/2 peaks of FeOOH, respectively [26,27] . The peak at 719.6 eV should be attributed to the Fe 2p1/2 peak of Fe−P species, [28] and the rest three peaks can be assigned to the satellite peaks [29] . In the spectrum of Co 2p (Figure 4b), two BEs peaks that are observed at 777.7 (Co 2p3/2) and 791.6 (Co 2p1/2) eV correspond to the Co−P bond in Co 2 P [30] .…”

Section: Resultsmentioning

confidence: 99%

Preparation of Fe‐doped Transition Metal Phosphides using Ionic Liquid as Precursor for Efficient Oxygen Evolution Reaction

Wang

2023

ChemCatChem

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For electrocatalysts in water splitting, activity and stability is at high are pivotal current density. Thus, transition metal phosphides were prepared using ionic liquid as precursor on nickel foam, where Fe was doped and this catalyst was covered by carbon. This Fe‐CoNiP−C/NF exhibits excellent OER activity, which only needs overpotentials of 355 and 424 mV to reach the current densities of 50 and 100 mA cm−2, respectively. Moreover, it obtains a good stability for more than 30 hours at 100 mA cm−2. Experimental results demonstrate part of this TMPs‐based catalyst is oxidized to metal oxyhydroxide species after phosphidation, which can significantly improve the activity for OER. Also, the low Fe doping and outer carbon enhance the OER activity and stability.

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“…Prussian blue analog (PBA) is a novel compound formed by replacing the iron element in Prussian blue (PB) with other elements such as cobalt and nickel without destroying the crystal structure [ 22 ]. It has been widely utilized in electrochemical energy storage [ 23 ], electrocatalysis [ 24 ], and other fields. It is worth noting that the redox of multiple metal ions occurs in PBA, which means that under certain conditions, PBA itself can provide a detection signal for electrochemical analyses.…”

Section: Introductionmentioning

confidence: 99%

Novel Dual-Signal SiO2-COOH@MIPs Electrochemical Sensor for Highly Sensitive Detection of Chloramphenicol in Milk

Geng

Liu

Huang

et al. 2023

Sensors

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In view of the great threat of chloramphenicol (CAP) to human health and the fact that a few producers have illegally used CAP in the food production process to seek economic benefits in disregard of laws and regulations and consumer health, we urgently need a detection method with convenient operation, rapid response, and high sensitivity capabilities to detect CAP in food to ensure people’s health. Herein, a molecularly imprinted polymer (MIP) electrochemical sensor based on a dual-signal strategy was designed for the highly sensitive analysis of CAP in milk. The NiFe Prussian blue analog (NiFe-PBA) and SnS2 nanoflowers were modified successively on the electrode surface to obtain dual signals from [Fe(CN)6]3−/4− at 0.2V and NiFe-PBA at 0.5 V. SiO2-COOH@MIPs that could specifically recognize CAP were synthesized via thermal polymerization using carboxylated silica microspheres (SiO2-COOH) as carriers. When the CAP was adsorbed by SiO2-COOH@MIPs, the above two oxidation peak currents decreased at the same time, allowing the double-signal analysis. The SiO2-COOH@MIPs/SnS2/NiFe-PBA/GCE sensor used for determining CAP was successfully prepared. The sensor utilized the interactions of various nanomaterials to achieve high-sensitivity dual-signal detection, which had certain innovative significance. At the same time, the MIPs were synthesized using a surface molecular imprinting technology, which could omit the time of polymerization and elution and met the requirements for rapid detection. After optimizing the experimental conditions, the detection range of the sensor was 10−8 g/L–10−2 g/L and the limit of detection reached 3.3 × 10−9 g/L (S/N = 3). The sensor had satisfactory specificity, reproducibility, and stability, and was successfully applied to the detection of real milk samples.

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CoFeP nanocube-arrays based on Prussian blue analogues for accelerated oxygen evolution electrocatalysis

Cited by 30 publications

References 50 publications

Iron‐Cobalt‐Cerium Multimetallic Oxides Derived from Prussian Blue Precursors: Enhanced Oxygen Evolution Electrocatalysis

Iron‐Cobalt‐Cerium Multimetallic Oxides Derived from Prussian Blue Precursors: Enhanced Oxygen Evolution Electrocatalysis

Preparation of Fe‐doped Transition Metal Phosphides using Ionic Liquid as Precursor for Efficient Oxygen Evolution Reaction

Novel Dual-Signal SiO2-COOH@MIPs Electrochemical Sensor for Highly Sensitive Detection of Chloramphenicol in Milk

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