From hydrogen production by water electrolysis to its utilization in a PEM fuel cell or in a SO fuel cell: Some considerations on the energy efficiencies

Lamy, C.

doi:10.1016/j.ijhydene.2016.04.173

Cited by 86 publications

(39 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The properties and cost considered in the analysis set in HOMER are those of proton exchange membrane (PEM) type fuel cell. The fuel consumption rate was fed into HOMER as suggested in other studies [58,59] that translates into electrical energy efficiencies in the range of about 40-50% that is expected for a PEM fuel cell. The electrolyser produces hydrogen from surplus power generated by wind turbines and solar PV, and it was sized to accommodate the surplus of PVs and wind energy generators.…”

Section: Hybrid Battery-hydrogen Storage Systemmentioning

confidence: 99%

Hydrogen as a Long-Term Large-Scale Energy Storage Solution to Support Renewables

2018

View full text Add to dashboard Cite

This paper presents a case study of using hydrogen for large-scale long-term storage application to support the current electricity generation mix of South Australia state in Australia, which primarily includes gas, wind and solar. For this purpose two cases of battery energy storage and hybrid battery-hydrogen storage systems to support solar and wind energy inputs were compared from a techno-economical point of view. Hybrid battery-hydrogen storage system was found to be more cost competitive with unit cost of electricity at $0.626/kWh (US dollar) compared to battery-only energy storage systems with a $2.68/kWh unit cost of electricity. This research also found that the excess stored hydrogen can be further utilised to generate extra electricity. Further utilisation of generated electricity can be incorporated to meet the load demand by either decreasing the base load supply from gas in the present scenario or exporting it to neighbouring states to enhance economic viability of the system. The use of excess stored hydrogen to generate extra electricity further reduced the cost to $0.494/kWh.

show abstract

Section: Hybrid Battery-hydrogen Storage Systemmentioning

confidence: 99%

Hydrogen as a Long-Term Large-Scale Energy Storage Solution to Support Renewables

2018

View full text Add to dashboard Cite

show abstract

“…The Hydrogen Evolution Reaction (HER) and the reverse reaction of Hydrogen Oxidation Reaction (HOR) are very important in electrochemical energy storage and conversion since H 2 produced by electrolysis of water in electrolyzers is the fuel feed in fuel cells [275,276]. Both electrodes used for HER in alkaline media (e.g., Ni) and in acid media (e.g., Pt) have been modified by other metals via a galvanic replacement process that introduces a second metal to the system.…”

Section: Hydrogen Evolution and Oxidationmentioning

confidence: 99%

Electrocatalysts Prepared by Galvanic Replacement

et al. 2017

View full text Add to dashboard Cite

Galvanic replacement is the spontaneous replacement of surface layers of a metal, M, by a more noble metal, M noble , when the former is treated with a solution containing the latter in ionic form, according to the general replacement reaction: nM + mM noble n+ → nM m+ + mM noble. The reaction is driven by the difference in the equilibrium potential of the two metal/metal ion redox couples and, to avoid parasitic cathodic processes such as oxygen reduction and (in some cases) hydrogen evolution too, both oxygen levels and the pH must be optimized. The resulting bimetallic material can in principle have a M noble-rich shell and M-rich core (denoted as M noble (M)) leading to a possible decrease in noble metal loading and the modification of its properties by the underlying metal M. This paper reviews a number of bimetallic or ternary electrocatalytic materials prepared by galvanic replacement for fuel cell, electrolysis and electrosynthesis reactions. These include oxygen reduction, methanol, formic acid and ethanol oxidation, hydrogen evolution and oxidation, oxygen evolution, borohydride oxidation, and halide reduction. Methods for depositing the precursor metal M on the support material (electrodeposition, electroless deposition, photodeposition) as well as the various options for the support are also reviewed. 1. Principle of Galvanic Replacement/Deposition 1.1. Thermodynamic Considerations When a metal, M (e.g., Cu, Fe, Co, Ni, Al, etc.), is immersed in a solution containing ions of a more noble metal, M noble n+ (e.g., Pt, Au, Pd, Ag, Ru, Ir, Rh, Os, etc.-i.e., a metal with a higher standard potential) then, due to the difference in their standard electrochemical potentials, E 0 noble − E 0 > 0, and provided that the ionic form of M is stable under the given experimental conditions (of temperatue, pH, complexing agents etc.), the following reaction is thermodynamically favored and can take place spontaneously: M noble n+ + n/m M → M noble + n/m M m+ (1) This reaction, which bears similarities with transmetalation reactions between metal complexes [1] and is also known as immersion plating [2] in the plating industry and galvanic replacement [3] in materials chemistry, can be considered to originate from the coupling of the following two half-reactions: M noble n+ + ne − ↔ M noble (E 0 noble) (2) M m+ + me − ↔ M (E 0) (3)

show abstract

“…The main advantage of the fuel cell system, notably PEMFC, is the efficiency in energy conversion, once the efficiency of electrochemical systems is above the other converter; however, the source of hydrogen is important [40,41]. The hydrogen obtained from water electrolysis is very pure, but it results in energy deficit [42]; the H 2 from steam hydrocarbons contains CO. Thus, the tendency is an aggregate of the system to convert energy.…”

Section: Proton Exchange Membrane Fuel Cellmentioning

confidence: 99%

Production of Hydrogen and their Use in Proton Exchange Membrane Fuel Cells

Colmati¹,

Alonso²,

Martins³

et al. 2018

Advances in Hydrogen Generation Technologies

View full text Add to dashboard Cite

This work will show an overview of the hydrogen production from ethanol by steam reforming method, using distinct catalysts, resulting in low carbon monoxide content in H2 produced; a thermodynamic analysis of reforming employing entropy maximization, the ideal condition for ethanol, and other steam reforming reactions, the state of the art of steam reforming catalysts for H2 production with low CO content. Moreover, in the second part, there will be an overview of the use of hydrogen in a proton exchange membrane fuel cell (PEMFC), the fuel cell operational conditions, a thermodynamic analysis of PEMFC, the catalysts used in the electrodes of the fuel cell, consequences of the CO presence in the hydrogen fuel feed in PEMFC, and the operation conditions for maximum output power density.

show abstract

From hydrogen production by water electrolysis to its utilization in a PEM fuel cell or in a SO fuel cell: Some considerations on the energy efficiencies

Cited by 86 publications

References 19 publications

Hydrogen as a Long-Term Large-Scale Energy Storage Solution to Support Renewables

Hydrogen as a Long-Term Large-Scale Energy Storage Solution to Support Renewables

Electrocatalysts Prepared by Galvanic Replacement

Production of Hydrogen and their Use in Proton Exchange Membrane Fuel Cells

Contact Info

Product

Resources

About