Stable and inexpensive electrodes for the hydrogen evolution reaction

Marini, Stefania; Salvi, Paolo; Nelli, P.; Pesenti, Rachele; Villa, M.; Kiros, Yohannes

doi:10.1016/j.ijhydene.2013.04.159

Cited by 43 publications

(18 citation statements)

References 41 publications

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“…Among non-noble metals, Ni seems to be a viable option as an anode for the alkaline membrane fuel cell technology because of the reduced cost and stability; although its lower activity for the hor than that of Pt [10,11,12] is a clear disadvantage. Hence, an improvement of the electrocatalytic properties is required.…”

Section: Introductionmentioning

confidence: 99%

Understanding the structure and reactivity of NiCu nanoparticles: an atomistic model

Quaino

Belletti

Shermukhamedov

et al. 2017

Phys. Chem. Chem. Phys.

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The structure of bimetallic NiCu nanoparticles (NP) is investigated as a function of their composition and size by means of Lattice MonteCarlo (LMC) and molecular dynamics (MD) simulations. According to our results, copper segregation takes place at any composition of the particles. We found that this feature is not size-dependent. In contrast, nickel segregation depends on the NP size. When the size increases, Ni atoms tend to remain in the vicinity of the surface and deeper. For smaller NPs, Ni atoms are located at the surface as well. Our results also showed that most of the metal atoms segregated at the surface area were found to decorate edges and/or form islands. Our findings agree qualitatively with the experimental data found in the literature. In addition, we comment on the reactivity of these nanoparticles.

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Section: Introductionmentioning

confidence: 99%

Understanding the structure and reactivity of NiCu nanoparticles: an atomistic model

Quaino

Belletti

Shermukhamedov

et al. 2017

Phys. Chem. Chem. Phys.

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“…Group (ii) includes catalysts designed after the strategy based on the hydrogen bond strength . Relating to the volcano curve for elemental metals, it appears comprehensible to combine hypo‐d‐electron metals with hyper‐d‐electron metals, e.g., Ni–Mo, Co–Mo, Ni–Cr,or Ni–W catalysts, in order to optimize the hydrogen bond strength. Adaption of the d‐band structure by designing Ni–nitrogen complexes as performed for HER catalysts is so far only observed for acidic applications …”

Section: Componentsmentioning

confidence: 99%

“…In order to develop novel, inexpensive and highly stable electrode materials, current research is mainly focusing on nonplatinum group metals . Among the non‐noble metals, Ni is the most active pure metal toward the HER in AWEs.…”

Section: Componentsmentioning

confidence: 99%

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H₂ generation from alkaline electrolyzer

Bodner

Hofer

Hacker

2014

WIREs Energy & Environment

107

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Water electrolysis is a promising approach to hydrogen production from renewable energy sources. Even though it is not necessarily environmentally friendly and a large number of possible feedstocks for hydrogen production include fossil resources such as coal, natural gas, and mineral oil, but also biomass, water, and components such as ethanol, methane, or ammonia can be used for hydrogen production. Also, a large variety of different energy sources can be used for hydrogen production. The combination of hydrogen production with renewable energy systems, such as photovoltaics, hydropower, or wind energy is very suitable though. Many innovative processes have been subject to intense research and some have already reached high efficiencies. Alkaline water electrolyzers with anion-conducting membranes hold many advantages in comparison to other systems. As cheaper, non-noble metals are stable in alkaline media, the relatively low cost of the electrode materials is one of the main advantages of alkaline systems over electrolyzers using proton-conducting electrolytes. Therefore, the main part of published literature on alkaline electrolysis describes electrodes based on low cost materials such as nickel for both anode and cathode. Yet still alkaline water electrolyzers have to compete against other forms of hydrogen production, such as steam reforming of natural gas. Even though many studies expect water electrolysis to become economically viable on a long-term basis, conventional hydrogen production is still hard to under-price.

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“…One of the most tested cathodes for alkaline water electrolysers are Ni-based alloys, such us NiCo [7][8][9][10][11], NiFe [12][13][14][15], NiMo [12,[16][17][18][19][20][21][22][23][24], NiW [12,19,25,26], NiCu [27], NiAl [28,29], NiZn [30,31]; due to the relatively high catalytic activity of Ni, and aiming at the synergism in the catalytic behaviour of the different components in the metallic alloy.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of Au-modified macroporous Ni electrocatalysts for alkaline water electrolysis

González-Buch

Herrãiz‐Cardona

Ortega

et al. 2016

International Journal of Hydrogen Energy

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Au nanoparticles (Au-NPs) were successfully synthesized and incorporated into the surface of a macroporous Ni electrode fabricated via galvanostatic electrodeposition at high current densities in order to produce hydrogen by means of alkaline water electrolysis. The developed electrodes were morphologically characterized by means of confocal laser scanning and field emission scanning electron microscopes. The electrocatalytic behaviour towards the hydrogen evolution reaction was studied by Tafel polarization curves and electrochemical impedance spectroscopy. It was clear that enlarging the real surface area of an electrode its catalytic activity was greatly enhanced. This improvement was further increased when Au-NPs were added to the macroporous Ni surface. In this case, the improvement was not only caused by enlarging the surface area but also by an improvement in the intrinsic catalytic activity of the alloy, as it was shown by the exchange current densities values, calculated from the real surface area.

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Stable and inexpensive electrodes for the hydrogen evolution reaction

Cited by 43 publications

References 41 publications

Understanding the structure and reactivity of NiCu nanoparticles: an atomistic model

Understanding the structure and reactivity of NiCu nanoparticles: an atomistic model

H₂ generation from alkaline electrolyzer

Synthesis and characterization of Au-modified macroporous Ni electrocatalysts for alkaline water electrolysis

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Stable and inexpensive electrodes for the hydrogen evolution reaction

Cited by 43 publications

References 41 publications

Understanding the structure and reactivity of NiCu nanoparticles: an atomistic model

Understanding the structure and reactivity of NiCu nanoparticles: an atomistic model

H2 generation from alkaline electrolyzer

Synthesis and characterization of Au-modified macroporous Ni electrocatalysts for alkaline water electrolysis

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H₂ generation from alkaline electrolyzer