Influence of the phosphorus source on iron phosphide nanoparticle synthesis for hydrogen evolution reaction catalysis

Park, Yoonsu; Kang, Hyeri; Hong, Yun‐Kun; Cho, Geonhee; Choi, Miri; Cho, Jiung; Ha, Don‐Hyung

doi:10.1016/j.ijhydene.2020.03.051

Cited by 26 publications

(25 citation statements)

References 42 publications

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“…According to the images of elemental mapping (Figure 2h,p), the well distribution of Fe and P on the surface of Fe x P/C indicates the sufficient phosphorization of PB. As for rGO@Fe x P/C, characteristic peaks located at 40.4°, 44.3°, and 47.5° in the XRD pattern (Figure 3a) and lattice spacing observed in the HR‐TEM (Figure 3b) of rGO@Fe x P/C reveal the formation of iron phosphides [ 30 ] even under the tight cover of rGO. The reason can be explained by the exposed edge of rGO@Fe x P/C as Figure S2 (Supporting Information) shown, where the gas (phosphine) could enter the gap between rGO layers to realize the phosphorization of PB.…”

Section: Resultsmentioning

confidence: 99%

Hierarchical Iron Phosphides Composite Confined in Ultrathin Carbon Layer as Effective Heterogeneous Electro‐Fenton Catalyst with Prominent Stability and Catalytic Activity

Cheng

Zheng

Shen

et al. 2021

Adv Funct Materials

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The heterogeneous electro-Fenton (EF) process is a promising wastewater treatment technology for the onsite production of H 2 O 2 and avoidance of iron sludge. However, the preparation of the cathode catalysts remains a challenge. Not only must the catalyst surface possesses active sites for both 2e − oxygen reduction reaction and heterogeneous Fenton reaction, preventing active metals from continuous leaching is also crucial to maintain its catalytic activity. Herein, a heterogeneous catalyst (rGO@Fe x P/C) with a vacuumized package-like structure, where carbon-supported iron phosphides (Fe x P/C) are tightly covered within interconnected reduced graphene oxide (rGO) sheets, is successfully prepared. The concentration of iron that dissolved from rGO@ Fe x P/C after the reaction is only 3.37% of bare Fe x P/C (14.6 mg L −1 ), while rGO@Fe x P/C achieves better performance towards sulfamethoxazole (10 mg L −1 ) degradation than Fe x P/C. Investigation on rGO@Fe x P/C with different thicknesses of outer rGO layer and diverse morphologic structures demonstrate that the unique structure of rGO@Fe x P/C played a decisive role in the simultaneously enhanced activity and stability.

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Section: Resultsmentioning

confidence: 99%

Hierarchical Iron Phosphides Composite Confined in Ultrathin Carbon Layer as Effective Heterogeneous Electro‐Fenton Catalyst with Prominent Stability and Catalytic Activity

Cheng

Zheng

Shen

et al. 2021

Adv Funct Materials

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“…Transition-metal phosphides continue to attract research attention due to their applications in photovoltaic devices, biomedical imaging, catalysis, energy generation, and storage. − Nickel phosphides, as an important transition metal phosphide, have been explored as catalysts in different chemical reactions. − It is a binary system that has been synthesized in different compositions and phases, including NiP, Ni 2 P, Ni 3 P, NiP 2 , NiP 3 , Ni 5 P 4 , and Ni 12 P 12 . The multiplicity of phases of nickel phosphide is a constraint to the preparation of the desired/pure phase nickel phosphide system.…”

Section: Introductionmentioning

confidence: 99%

Triphenylphosphine-Assisted Transformation of NiS to Ni₂P through a Solvent-Less Pyrolysis Route: Synthesis and Electrocatalytic Performance

et al. 2021

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Straightforward synthetic routes to the preparation of transition metal phosphides or their chalcogenide analogues are highly desired due to their widespread applications, including catalysis. We report a facile and simple route for the preparation of a pure phase nickel phosphide (Ni 2 P) and phase transformations in the nickel sulfide (NiS) system through a solvent-less synthetic protocol. Decomposition of different sulfur-based complexes (dithiocarbamate, xanthate, and dithiophosphonate) of nickel(II) was investigated in the presence and absence of triphenylphosphine (TPP). The optimization of reaction parameters (nature of precursor, ratio of TPP, temperature, and time) indicated that phosphorus-and sulfur-containing inorganic dithiophosphonate complexes and TPP (1:1 mole ratio) produced pure nickel phosphide, whereas different phases of nickel sulfide were obtained from dithiocarbamate and xanthate precursors in the presence or absence of TPP. A plausible explanation of the sulfide or phosphide phase formation is suggested, and the performance of Ni 2 P was investigated as an electrocatalyst for supercapacitance and overall water-splitting reactions. The performance of Ni 2 P with the surface free of any capping agents is not well explored, as common synthetic methods are solution-based routes; therefore, the electrocatalytic performance was also compared with metal phosphides, prepared by other routes. The highest specific capacitance of 367 F/g was observed at 1 A/g, and the maximum energy and power density of Ni 2 P were calculated to be 17.9 Wh/kg and 6951 W/kg, respectively. The prepared nickel phosphide required overpotentials of 174 and 316 mV along with Tafel slopes of 115 and 95 mV/dec to achieve a current density of 10 mA/cm 2 for the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER), respectively.

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“…3,4 To produce hydrogen using PEMWEs, Pt and its alloys still represent the benchmark hydrogen evolution reaction (HER) catalysts, with high stability and superior catalytic activity; however, the practical applications of these materials are hindered by their price and scarcity. 5,6 Various non-platinum catalysts, such as transition metal phosphides, 7,8 selenides, 9,10 sulfides, 11,12 oxides, 13,14 nitrides, 15,16 and carbides, 17,18 have been developed as candidates to replace Pt; however, these catalysts still have lower catalytic activity and durability than Pt. Thus, the development of inexpensive catalysts with activity comparable to that of Pt remains a major challenge.…”

Section: Introductionmentioning

confidence: 99%

Restructured Co‐Ru alloys via electrodeposition for efficient hydrogen production in proton exchange membrane water electrolyzers

Lee

Park

Kim

et al. 2022

Intl J of Energy Research

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Summary The design of robust and high‐performance hydrogen evolution reaction (HER) catalysts is crucial for the scalable production of hydrogen by electrochemical water splitting. In this work, we fabricated hierarchically porous Co‐Ru catalysts with excellent catalytic activity and durability in acidic media. The morphology of the Co‐Ru catalysts was successfully controlled through an optimized electrochemical process. Among all Co‐Ru samples prepared in this study, the Co72Ru28 catalyst exhibited the largest catalytic surface area, as well as excellent HER activity (overpotential of 26.4 mV at −10 mA cm−2) and durability. X‐ray photoelectron spectroscopy measurements revealed the electron transfer between Co and Ru, indicating that the formation of the Co‐Ru alloy improved the activity and durability of the catalyst. Furthermore, a proton exchange membrane water electrolyzer (PEMWE) prepared with the Co72Ru28 sample showed excellent performances (3.4 A cm−2 at 2.0 Vcell), illustrating the promising potential of the present Co‐Ru catalysts as cathode materials for PEMWE systems.

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Influence of the phosphorus source on iron phosphide nanoparticle synthesis for hydrogen evolution reaction catalysis

Cited by 26 publications

References 42 publications

Hierarchical Iron Phosphides Composite Confined in Ultrathin Carbon Layer as Effective Heterogeneous Electro‐Fenton Catalyst with Prominent Stability and Catalytic Activity

Hierarchical Iron Phosphides Composite Confined in Ultrathin Carbon Layer as Effective Heterogeneous Electro‐Fenton Catalyst with Prominent Stability and Catalytic Activity

Triphenylphosphine-Assisted Transformation of NiS to Ni₂P through a Solvent-Less Pyrolysis Route: Synthesis and Electrocatalytic Performance

Restructured Co‐Ru alloys via electrodeposition for efficient hydrogen production in proton exchange membrane water electrolyzers

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Influence of the phosphorus source on iron phosphide nanoparticle synthesis for hydrogen evolution reaction catalysis

Cited by 26 publications

References 42 publications

Hierarchical Iron Phosphides Composite Confined in Ultrathin Carbon Layer as Effective Heterogeneous Electro‐Fenton Catalyst with Prominent Stability and Catalytic Activity

Hierarchical Iron Phosphides Composite Confined in Ultrathin Carbon Layer as Effective Heterogeneous Electro‐Fenton Catalyst with Prominent Stability and Catalytic Activity

Triphenylphosphine-Assisted Transformation of NiS to Ni2P through a Solvent-Less Pyrolysis Route: Synthesis and Electrocatalytic Performance

Restructured Co‐Ru alloys via electrodeposition for efficient hydrogen production in proton exchange membrane water electrolyzers

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Product

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Triphenylphosphine-Assisted Transformation of NiS to Ni₂P through a Solvent-Less Pyrolysis Route: Synthesis and Electrocatalytic Performance