Enhanced electrocatalytic performance of FeNiCoP amorphous alloys as oxygen-evolving catalysts for electrolytic water splitting application

Jiang, Shaofei; Zhu, Liya; Yang, Z.Z.; Wang, Yingang

doi:10.1016/j.electacta.2020.137618

Cited by 41 publications

(26 citation statements)

References 55 publications

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“…Metal phosphides and phosphate‐based materials have recently been considered to be competitive candidates as efficient electrocatalysts due to high electrocatalytic activity, adjustable structure composition and stability [11–13] . There are two main methods for the preparation of phosphorus‐containing electrocatalysts.…”

Section: Introductionmentioning

confidence: 99%

“…There are two main methods for the preparation of phosphorus‐containing electrocatalysts. One is to introduce additional inorganic phosphorus sources during high‐temperature carbonization process, such as NaH 2 PO 2 ⋅ H 2 O, [11,12,14,15] red phosphorus, [12] Na 2 HPO 4 , [13] and NH 4 H 2 PO 4 [16] . For example, Ni 12 P 5 and Ni 2 P can be prepared by a hydrothermal method using red phosphorus as phosphorous source [12] .…”

Section: Introductionmentioning

confidence: 99%

“…One is to introduce additional inorganic phosphorus sources during high‐temperature carbonization process, such as NaH 2 PO 2 ⋅ H 2 O, [11,12,14,15] red phosphorus, [12] Na 2 HPO 4 , [13] and NH 4 H 2 PO 4 [16] . For example, Ni 12 P 5 and Ni 2 P can be prepared by a hydrothermal method using red phosphorus as phosphorous source [12] . The other is to use organophosphorus‐containing ligands as precursors, including O‐phospho‐DL‐serine [13] and phytic acid [15] .…”

Section: Introductionmentioning

confidence: 99%

“…Phytic acid (PA) is a natural organic phosphorus resource containing six phosphoric acid groups, which can be obtained from plant seeds and grains, and has a strong chelating ability. Currently, PA‐based polymer gels have been developed, [11–14,25–27] and PA‐based materials are usually employed as precursors for further pyrolysis for electrocatalysis [28–30] . For example, Han and co‐workers synthesized cobalt phosphide nanocrystals encapsulated by P‐doped carbon (PC) and married with P‐doped graphene (PG) nanohybrids CoP‐Co 2 P@PC/PG through controllable thermal conversion of pre‐synthesized supramolecular gels, which showed the overpotential of 39 mV at 10 mA cm −2 for HER and 272 mV at 20 mA cm −2 for OER [11] .…”

Section: Introductionmentioning

confidence: 99%

“…This electrocatalyst only needed a cell voltage of 1.57 V for water splitting to reach the current density at 10 mA cm −2 . CL−Co 2 P 2 O 7 @C core‐shell nanohybrids were synthesized by combination of the structural merits of supramolecular polymer gels and a controllable thermal conversion technique, which show electrocatalytic OER performance with overpotential of 397 mV at a current density of 10 mA cm −2 in alkaline solution [12] …”

Section: Introductionmentioning

confidence: 99%

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Phytic Acid‐Based FeCo Bimetallic Metal‐Organic Gels for Electrocatalytic Oxygen Evolution Reaction

Feng

Xiao

Huang

et al. 2021

Chemistry An Asian Journal

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Electrocatalysts have been developed to improve the efficiency of gas release for oxygen evolution reaction (OER), and finding a simple and efficient method for efficient electrocatalysts has inspired research enthusiasm. Herein, we report bimetallic metal‐organic gels derived from phytic acid (PA) and mixed transition metal ions to explore their performance in electrocatalytic oxygen evolution reaction. PA is a natural phosphorus‐rich organic compound, which can be obtained from plant seeds and grains. PA reacts with bimetallic ions (Fe3+ and Co2+) in a facile one‐pot synthesis under mild conditions to form PA‐FeCo bimetallic gels, and the corresponding aerogels are further partially reduced with NaBH4 to improve the electrocatalytic activity. Mixed valence states of Fe(II)/Fe(III) and Co(III)/Co(II) are present in the materials. Excellent OER performance in terms of overpotential (257 mV at 20 mA cm−2) and Tafel slope (36 mV dec−1) is achieved in an alkaline electrolyte. This reduction method is superior to the pyrolysis method by well maintaining the gel morphology structure. This strategy is conducive to the further improvement of the performance of metal‐organic electrocatalysts, and provides guidance for the subsequent application of metal‐organic gel electrocatalysts.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Phytic Acid‐Based FeCo Bimetallic Metal‐Organic Gels for Electrocatalytic Oxygen Evolution Reaction

Feng

Xiao

Huang

et al. 2021

Chemistry An Asian Journal

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Electrocatalysts for the Oxygen Evolution Reaction in Acidic Media

et al. 2023

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Figure 4. a) The DFT-predicted free energies of the four reactions steps on RuO 2 (110) surface at different potentials (U = 0, U = 1.23, U = 1.6). Reproduced with permission. [40] Copyright 2007, Elsevier. b) The binding energies of M-OH and M-OOH on various oxide surfaces; c) the volcano relationship between catalytic activity and binding energy; d) DFT-predicted overpotential versus the experimental data. b-d) Adapted with permission. [42] Copyright 2011, Wiley-VCH.Figure 5. LOM pathways proposed by Mefford et al. [49] (a) and Gramaud et al. [51] (b). a) Reproduced with permission. [49]

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Crystal Facets‐Activity Correlation for Oxygen Evolution Reaction in Compositional Complex Alloys

Zhao,

Yao,

Wang

et al. 2024

Advanced Science

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Compositional complex alloys, including high and medium‐entropy alloys (HEAs/MEAs) have displayed significant potential as efficient electrocatalysts for the oxygen evolution reaction (OER), but their structure‐activity relationship remains unclear. In particular, the basic question of which crystal facets are more active, especially considering the surface reconstructions, has yet to be answered. This study demonstrates that the lowest index {100} facets of FeCoNiCr MEAs exhibit the highest activity. The underlying mechanism associated with the {100} facet's low in‐plane density, making it easier to surface reconstruction and form amorphous structures containing the true active species is uncovered. These results are validated by experiments on single crystals and polycrystal MEAs, as well as DFT calculations. The discoveries contribute to a fundamental comprehension of MEAs in electrocatalysis and offer physics‐based strategies for developing electrocatalysts.

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Enhanced electrocatalytic performance of FeNiCoP amorphous alloys as oxygen-evolving catalysts for electrolytic water splitting application

Cited by 41 publications

References 55 publications

Phytic Acid‐Based FeCo Bimetallic Metal‐Organic Gels for Electrocatalytic Oxygen Evolution Reaction

Phytic Acid‐Based FeCo Bimetallic Metal‐Organic Gels for Electrocatalytic Oxygen Evolution Reaction

Electrocatalysts for the Oxygen Evolution Reaction in Acidic Media

Crystal Facets‐Activity Correlation for Oxygen Evolution Reaction in Compositional Complex Alloys

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