Hydrogen: the energy source for the 21st century

Johnston, Brenda; Mayo, Michael C.; Khare, Anshuman

doi:10.1016/j.technovation.2003.11.005

Cited by 316 publications

(148 citation statements)

References 2 publications

Supporting

Mentioning

143

Contrasting

Unclassified

Order By: Relevance

“…For instance, photocatalytic water splitting is one of the most important reactions currently being investigated because it generates sustainable H 2 fuel, which may originate from abundant solar energy. [1][2] The heterogeneous photocatalysts are made of semiconductors that absorb sunlight, on the surface of which are generally deposited electrocatalysts that facilitate surface redox reactions.…”

Section: Introductionmentioning

confidence: 99%

Bismuth Silver Oxysulfide for Photoconversion Applications: Structural and Optoelectronic Properties

et al. 2017

View full text Add to dashboard Cite

Single-phase bismuth silver oxysulfide, BiAgOS, was prepared by a hydrothermal method. Its structural, morphological and optoelectronic properties were investigated and compared with bismuth copper oxysulfide (BiCuOS). Rietveld refinement of the powder X-ray diffraction (XRD) measurements revealed that the BiAgOS and BiCuOS crystals have the same structure as ZrSiCuAs: the tetragonal space group P4/nmm. X-ray photoelectron spectroscopy (XPS) analyses confirmed that the BiAgOS has a high purity, in contrast with BiCuOS, which tends to have Cu vacancies. The Ag has a monovalent oxidation state, whereas Cu is present in the oxidation states of +1 and +2 in the BiCuOS system. Combined with experimental measurements, density functional theory calculations employing the range-separated hybrid HSE06 exchange-correlation functional with spin-orbit coupling quantitatively elucidated photophysical properties such as absorption coefficients, effective masses and dielectric constants. BiCu-OS and BiAgOS were found to have indirect bandgaps of 1.1 and 1.5 eV, respectively. Both possess high dielectric constants and low electron and hole effective masses. Therefore, these materials are expected to have high exciton dissociation capabilities and excellent carrier diffusion properties. This study reveals that BiAgOS is a promising candidate for photoconversion applications.

show abstract

Section: Introductionmentioning

confidence: 99%

Bismuth Silver Oxysulfide for Photoconversion Applications: Structural and Optoelectronic Properties

et al. 2017

View full text Add to dashboard Cite

show abstract

“…Hydrogen is an efficient and clean energy source and will be widely used in the future [1]. The solid polymer electrolyte (SPE) water electrolysis is considered to be a very promising technology of producing hydrogen from renewable energy source [2,3].…”

Section: Introductionmentioning

confidence: 99%

The dynamic-state effects of sodium ion contamination on the solid polymer electrolyte water electrolysis

Zhang

Xiao

Shao

et al. 2013

Journal of Power Sources

View full text Add to dashboard Cite

“…Automobiles powered by electricity or hydrogen energy are being advocated in order to decrease the oil-dependence in the transportation sector [1], [3]. There are different ways to make use of electric energy or hydrogen energy in automobiles.…”

Section: Introductionmentioning

confidence: 99%

Multi-Criteria Decision Making-Based Comparison of Power Source Technologies for Utilization in Automobiles

Üçtuğ¹,

Kabakcı²,

Bekdikhan³

et al. 2015

JOCET

View full text Add to dashboard Cite

Abstract-Four automobiles with different power sources were compared and ranked according to five different criteria by using a multi-criteria decision making approach named TOPSIS. An internal combustion engine vehicle, an electric vehicle, a hybrid electric vehicle and a hydrogen fuel cell vehicle, all with similar sizes and characteristics, were compared in terms of their initial costs, operating costs, environmental effects, on-board safety and performance. The scores for each of these criteria were obtained from the literature. Criteria weights were determined via a survey which was conducted to a total of 151 people, who were then divided into three groups according to their monthly income, considering that with variant incomes preferences and priorities differ. For all cases, the ideal technology emerged to be internal combustion engine vehicles, due to their low initial costs, external costs and high performance. Hybrid electric vehicles appeared almost as favorable as internal combustion engine automobiles. Hydrogen fuel cell vehicles gathered the least scores, given the premature state of the technology and consequent high prices. The results of our study show that while internal combustion engine vehicles continue to dominate the automotive market for the time being, hybrid electric vehicles have the potential to become competitive alternatives.

show abstract

Hydrogen: the energy source for the 21st century

Cited by 316 publications

References 2 publications

Bismuth Silver Oxysulfide for Photoconversion Applications: Structural and Optoelectronic Properties

Bismuth Silver Oxysulfide for Photoconversion Applications: Structural and Optoelectronic Properties

The dynamic-state effects of sodium ion contamination on the solid polymer electrolyte water electrolysis

Multi-Criteria Decision Making-Based Comparison of Power Source Technologies for Utilization in Automobiles

Contact Info

Product

Resources

About