Tailored transition metal-doped nickel phosphide nanoparticles for the electrochemical oxygen evolution reaction (OER)

Man, Ho Wing; Tsang, Chui Shan; Li, Molly Meng‐Jung; Mo, Jiaying; Huang, Bolong; Lee, Yoon Suk; Leung, Yun Chung; Wong, Kwok Yin; Tsang, Shik Chi Edman

doi:10.1039/c8cc03870h

Cited by 77 publications

(23 citation statements)

References 52 publications

(9 reference statements)

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“…The introduction of phosphorus not only enhances the conductivity of some metal catalysts, but also tunes the adsorption energy of active sites [115] . However, the enhanced OER performance of metal phosphides is still far from the best performance of the noble metal, such as FeP [116][117][118] and NiP [16,119] . To solve this issue, Li and co-workers reported the synthesis of Fe-doped Ni 2 P nanosheets on nickel foam [120] .…”

Section: Nife-based Phosphides On Nickel Foam For Oermentioning

confidence: 99%

NiFe-based nanostructures on nickel foam as highly efficiently electrocatalysts for oxygen and hydrogen evolution reactions

Zhang

et al. 2019

Journal of Energy Chemistry

172

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Section: Nife-based Phosphides On Nickel Foam For Oermentioning

confidence: 99%

NiFe-based nanostructures on nickel foam as highly efficiently electrocatalysts for oxygen and hydrogen evolution reactions

Zhang

et al. 2019

Journal of Energy Chemistry

172

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“…As an electrode active material for OER, many transition metal compounds having various ligands such as oxide, hydroxide, and phosphide are used [ 5 , 6 , 7 ], of which Co-based metal oxide is the most promising OER electrode active material available in alkaline media. Moreover, doping a metal ion such as Ni or Fe with a Co-based oxide can further improve electrocatalytic performance.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Electrochemical Properties and OER Performances by Cu Substitution in NiCo2O4 Spinel Structure

Park

Choi

et al. 2020

Nanomaterials

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In order to improve the electrochemical performance of the NiCo2O4 material, Ni ions were partially substituted with Cu2+ ions having excellent reducing ability. All of the electrodes were fabricated by growing the Ni1−xCuxCo2O4 electrode spinel-structural active materials onto the graphite felt (GF). Five types of electrodes, NiCo2O4/GF, Ni0.875Cu0.125Co2O4/GF, Ni0.75Cu0.25Co2O4/GF, Ni0.625Cu0.375Co2O4/GF, and Ni0.5Cu0.5Co2O4/GF, were prepared for application to the oxygen evolution reaction (OER). As Cu2+ ions were substituted, the electrochemical performances of the NiCo2O4-based structures were improved, and eventually the OER activities were also greatly increased. In particular, the Ni0.75Cu0.25Co2O4/GF electrode exhibited the best OER activity in a 1.0 M KOH alkaline electrolyte: the cell voltage required to reach a current density of 10 mA cm−2 was only 1.74 V (η = 509 mV), and a low Tafel slope of 119 mV dec−1 was obtained. X-ray photoelectron spectroscopy (XPS) analysis of Ni1−xCuxCo2O4/GF before and after OER revealed that oxygen vacancies are formed around active metals by the insertion of Cu ions, which act as OH-adsorption sites, resulting in high OER activity. Additionally, the stability of the Ni0.75Cu0.25Co2O4/GF electrode was demonstrated through 1000th repeated OER acceleration stability tests with a high faradaic efficiency of 94.3%.

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“…In recent years, the design and synthesis of electrocatalysts based on soil‐rich 3d transition metals (such as Fe, Co, Ni, and Cu) has attracted widespread attentions . Bimetallic‐based materials exhibit higher electrocatalytic activity due to synergy between different metal elements compared to single metal based materials .…”

Section: Introductionmentioning

confidence: 99%

In‐situ Growth of a Bimetallic Cobalt‐Nickel Organic Framework on Iron Foam: Achieving the Electron Modification on a Robust Self‐supported Oxygen Evolution Electrode

Luo

Zhao

et al. 2019

ChemCatChem

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As a clean energy source, hydrogen may be obtained via overall water splitting. However, the reaction is limited by the anodic oxygen evolution reaction (OER) in the catalytic field. In order to overcome the limitation in OER catalyst activity, this paper attempts to synthesize and develop a series of three-dimensional metal-organic frameworks (MOFs) electrocatalytic materials. The structure and morphology of bimetallic cobalt and nickel MOFs are characterized by FT-IR, Raman, SEM, TEM, and XPS. It is found that the bimetallic cobalt and nickel MOFs have a columnar micro-structure assembled by nanosheets. Further in-situ growth on the iron (Fe) foam to prepare an integrated nanoarray self-supported electrode did not significant change their micro-structure. The obtained bimetal electrocatalysts exhibit significantly enhanced OER activity as compared to the single-metal MOFs counterpart. The cobalt and nickel doubledoped materials in-situ grown on Fe foam exhibited an excellent electrocatalytic activity and remarkable durability with a current density of 10 mA cm À 2 in a 0.1 M KOH solution (with the overpotential of 264 mV and the Tafel slope of 54.3 mV dec À 1 ). There is a significant improvement compared with the material on the glassy carbon electrode. The introduction of the bimetal species (Co and Ni) into the ordered MOFs provides a synergistic effect of the active centers resulting in an enhanced electron transfer and improved electrochemical performance. This work enriches the MOFs electrocatalytic electrode and pave the way for their practical applications.[a] Dr.Reagent: All reagents and materials in this experiment were obtained commercially and were used as received without any further purification. 1,2,4,5-Benzenetetracarboxylic acid (H 4 btec 98 %, AR), NiCl 2 ·6H 2 O (98 %, AR), CoCl 2 ·6H 2 O (98 %, AR), NaOH (96 %, AR), KOH (96 %, AR) and the Nafion solution (5 wt.%) were purchased from J&K Chemical Co. The ultrapure water (18 MΩ cm) was supplied by a Millipore System (Millipore Q). The thickness of iron foam was 0.5 mm. Synthesis of [M 2 (btec)(H 2 O)4]·2H 2 O (M = Ni and Co):The [M 2 (btec) (H 2 O) 4 ]·2H 2 O was synthesized via a hydrothermal process, as previously reported and with minor modifications. [44] The specific synthesis process is as follows: 1.4 mmol of MCl 2 ·6H 2 O (M: Co, Ni, or Co/Ni mixed with 1 : 1 in at.%) and 0.94 mmol of H 4 btec were dissolved in 10 mL ultrapure water, then the pH was adjusted by 2.2 mmol of NaOH. Afterwards, the as-prepared mixture solution was transferred into a 25 mL Teflon stainless-steel autoclave, and heated at 110°C for 72 h. After that, the autoclave was cooled to room temperature, the as-prepared three-dimensional (3D) MOFs were collected after being washed with ultrapure water and dried at 60°C in an oven. The as-obtained red crystals of 3D-CoMOFs were obtained with a yield of 78.6 %, the green crystals of 3D-NiMOFs with a yield of 85.2 %, and the brown crystals of 3DÀ Co/ NiMOFs with a yield of 80.6 %, respectively ( Figure S1). In-situ synthe...

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Tailored transition metal-doped nickel phosphide nanoparticles for the electrochemical oxygen evolution reaction (OER)

Cited by 77 publications

References 52 publications

NiFe-based nanostructures on nickel foam as highly efficiently electrocatalysts for oxygen and hydrogen evolution reactions

NiFe-based nanostructures on nickel foam as highly efficiently electrocatalysts for oxygen and hydrogen evolution reactions

Enhanced Electrochemical Properties and OER Performances by Cu Substitution in NiCo2O4 Spinel Structure

In‐situ Growth of a Bimetallic Cobalt‐Nickel Organic Framework on Iron Foam: Achieving the Electron Modification on a Robust Self‐supported Oxygen Evolution Electrode

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