A short review on generation of green fuel hydrogen through water splitting

Hota, Poulami; Das, Aranya; Maiti, Dilip K.

doi:10.1016/j.ijhydene.2022.09.264

Cited by 98 publications

(31 citation statements)

References 117 publications

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“…Hydrogen, as a representation of clean, high-efficiency and environmentally friendly energy, is predicted to replace finite resources and satisfy our need for green energy in the future. [1][2][3] The hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER) can be produced with constant electrical energy input, which offers an applicable method for the creation of pure hydrogen. [4][5][6] It is well known that precious metals such as Pt and RuO 2 /IrO 2 are now the finest catalysts for the HER and the OER, respectively.…”

Section: Introductionmentioning

confidence: 99%

Molybdenum-doped Co₃S₄ nanoarrays as outstanding catalysts for overall water splitting

Zhai,

Cai,

Gong

et al. 2024

CrystEngComm

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Section: Introductionmentioning

confidence: 99%

Molybdenum-doped Co₃S₄ nanoarrays as outstanding catalysts for overall water splitting

Zhai,

Cai,

Gong

et al. 2024

CrystEngComm

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“…Water splitting for hydrogen production is a proposed reaction to store renewable energy. 7,8 Unfortunately, the oxygen evolution reaction (OER) through the water oxidation reaction is a bottleneck for water splitting. 9 Ir-and Ru-based catalysts have been extensively studied for the OER.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Interest in renewable energy sources has arisen because of fossil fuel depletion and environmental and economic issues. − Using renewable energy is one of the solutions to these problems. , However, renewable energy sources are intermittent. Water splitting for hydrogen production is a proposed reaction to store renewable energy. , Unfortunately, the oxygen evolution reaction (OER) through the water oxidation reaction is a bottleneck for water splitting …”

Section: Introductionmentioning

confidence: 99%

Dynamic Changes of an Anodized FeNi Alloy during the Oxygen Evolution Reaction under Alkaline Conditions

Akbari,

Nandy,

Chae

et al. 2023

Langmuir

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An efficient and durable oxygen evolution reaction (OER) catalyst is necessary for the water-splitting process toward energy conversion. The OER through water oxidation reactions could provide electrons for H 2 O, CO 2 , and N 2 reduction and produce valuable compounds. Herein, the FeNi (1:1 Ni/Fe) alloy as foam, after anodizing at 50 V in a two-electrode system in KOH solution (1.0 M), was characterized by Raman spectroscopy, diffuse reflectance spectroscopy (DRS), X-ray absorption spectroscopy (XAS), X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectrometry (EDX), transmission electron microscopy (TEM), high-angle annular darkfield imaging (HAADF)−scanning transmission electron microscopy (STEM) and used as an efficient and durable OER electrocatalyst in KOH solution (1.0 M). The overpotential for the onset of the OER based on extrapolation of the Tafel plot was 225 mV. The overpotentials for the current densities of 10 and 30 mA/cm 2 are observed at 270 and 290 mV, respectively. In addition, a low Tafel slope is observed, 38.0 mV per decade, for the OER. To investigate the mechanism of the OER, in situ surfaceenhanced Raman spectroscopy was used to detect FeNi hydroxide and characteristic peaks of H 2 O. Impurities in KOH can adsorb onto the electrode surface during the OER. Peaks corresponding to Ni(III) (hydr)oxide and FeO 4 2− can be detected during the OER, but high-valent FeNi (hydr)oxides are unstable and reduce under the open circle potential. Metal hydroxide transformations during the OER and anion adsorption should be carefully considered. In addition, Fe 3 O 4 may convert to γ-Fe 2 O 3 during the OER. This study aims to offer logical perspectives on the dynamic changes that occur during the OER under alkaline conditions in an anodized FeNi alloy. These changes encompass variations in morphology, surface oxidation, the generation of high-valent species, and phase conversion during the OER.

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“…19−22 These reactions have recently attracted a lot of interest as a method of obtaining green hydrogen fuel, key for the successful decarbonization of the economy. 23,24 Nevertheless, to date only few degradation studies on materials such as Irbased, 25−27 perovskite 5 or Ni/Fe-based 28 fewer investigations on Pt-based nanoparticles have been reported. 29,30 The reduced number of IL(S)TEM research on gas evolving reactions can be related to their intrinsic difficulty: 8,29 the bubbles formed on the TEM grids do not easily release, thus blocking their surface and preventing electrical contact with the electrolyte.…”

Section: ■ Introductionmentioning

confidence: 99%

“…However, beyond fuel cell technology, the IL(S)TEM method has only mildly expanded to other electrochemical application fields, such as batteries , and water-splitting catalysis. Water-splitting converts water to oxygen and hydrogen gases through the oxygen evolution (OER) and the hydrogen evolution reaction (HER), respectively. − These reactions have recently attracted a lot of interest as a method of obtaining green hydrogen fuel, key for the successful decarbonization of the economy. , Nevertheless, to date only few degradation studies on materials such as Ir-based, − perovskite or Ni/Fe-based OER catalysts have been conducted with IL(S)TEM. When it comes to HER, even fewer investigations on Pt-based nanoparticles have been reported. , …”

Section: Introductionmentioning

confidence: 99%

Expanding the Potential of Identical Location Scanning Transmission Electron Microscopy for Gas Evolving Reactions: Stability of Rhenium Molybdenum Disulfide Nanocatalysts for Hydrogen Evolution Reaction

Vega-Paredes,

Scheu,

Aymerich-Armengol

2023

ACS Appl. Mater. Interfaces

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Identical location (scanning) transmission electron microscopy provides valuable insights into the mechanisms of the activity and degradation of nanocatalysts during electrochemical reactions. However, the technique suffers from limitations that hinder its widespread use for nanocatalysts of gas evolving reactions, e.g., the hydrogen evolution reaction (HER). The main issue is the production of bubbles that cause the loss of electric contact in identical location measurements, which is critical for the correct cycling of the nanocatalysts and interpretation of the electron microscopy results. Herein, we systematically evaluate different set-ups, materials, and tools to allow the facile and reliable study of the stability of HER nanocatalysts. The optimized conditions are applied for the study of layered rhenium molybdenum disulfide (Re0.2Mo0.8S2) nanocatalysts, a relevant alternative to Pt catalysts for the HER. With our approach, we demonstrate that although the morphology of the Re0.2Mo0.8S2 catalyst is maintained during HER, chemical composition changes could be correlated to the electrochemical reaction. This study expands the potential of the IL(S)TEM technique for the construction of structure–property relationships of nanocatalysts of gas evolving reactions.

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A short review on generation of green fuel hydrogen through water splitting

Cited by 98 publications

References 117 publications

Molybdenum-doped Co₃S₄ nanoarrays as outstanding catalysts for overall water splitting

Molybdenum-doped Co₃S₄ nanoarrays as outstanding catalysts for overall water splitting

Dynamic Changes of an Anodized FeNi Alloy during the Oxygen Evolution Reaction under Alkaline Conditions

Expanding the Potential of Identical Location Scanning Transmission Electron Microscopy for Gas Evolving Reactions: Stability of Rhenium Molybdenum Disulfide Nanocatalysts for Hydrogen Evolution Reaction

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A short review on generation of green fuel hydrogen through water splitting

Cited by 98 publications

References 117 publications

Molybdenum-doped Co3S4 nanoarrays as outstanding catalysts for overall water splitting

Molybdenum-doped Co3S4 nanoarrays as outstanding catalysts for overall water splitting

Dynamic Changes of an Anodized FeNi Alloy during the Oxygen Evolution Reaction under Alkaline Conditions

Expanding the Potential of Identical Location Scanning Transmission Electron Microscopy for Gas Evolving Reactions: Stability of Rhenium Molybdenum Disulfide Nanocatalysts for Hydrogen Evolution Reaction

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Molybdenum-doped Co₃S₄ nanoarrays as outstanding catalysts for overall water splitting

Molybdenum-doped Co₃S₄ nanoarrays as outstanding catalysts for overall water splitting