Before introducing electrochemical reactions in fuel cells, the chemical reactions of hydrogen-oxygen combustion should be discussed: (1.1)H2+12O2→H2O+Q where Q is the reaction heat in kJ mol−1. From a macroscopic view, the heat released by hydrogen combustion can be used as energy. From...
To generate electricity from hydrogen, it needs to be reacted with oxygen and the resulting energy captured and used by an electric generator. The simplest form of this reaction is combustion: 2H2(g) +O2(g) →2H2O(l) +energy (3) where oxygen and hydrogen combine to produce water and r...
which the oxygen in the air is catalytically reacted with hydrogen gas concurrently generated and added to the air flow for at least a predetermined length of time after which the generation and addition of hydrogen gas is terminated when the hydrogen/oxygen reaction falls below a given level. ...
(such as that attached to the oxygen inethanol, C2H5OH, and those attached to the nitrogen in acetamide, CH3CONH2) can beconvertedtomethane(measured in a gas buret) by reaction with the methylGrignard reagent, CH3MgI. Hydridic hydrogen atoms (as in NaBH4, LiH, etc.) can be converted ...
bring an optimized apparent hydrogen binding energy and thus lead to the high hydrogen oxidation reaction performance of NiCuCr. These results suggest that the apparent hydrogen binding energy determines the hydrogen oxidation reaction performance and that its tuning is beneficial toward high electrocataly...
for oxygen vacancy generation, with transition-metal doping, for hole creation. A key example of this is BaCoxFe0.8−xZr0.1Y0.1O3−δ, which has shown tunability with dopant concentration for the oxygen reduction reaction in protonic ceramic fuel cells.17In cases where multiple charged mo...
These double perovskite oxide materials exhibit bifunctional catalytic activity for the oxygen evolution reaction (OER) and oxygen reduction reaction (ORR). The phase formation and structure of the prepared oxides have been determined by powder X-ray diffraction, SEM analysis. Presence of various ...
A novel surface engineering approach for the synthesis of Ni–Mn–P@Co–S nanosheets as an advanced electrocatalyst for hydrogen evolution reaction Ehsan Allahyari, ... Ali Davoodi 4 April 2025 Read latest issue More from International Journal of Hydrogen Energy ...
Oxygen reduction reaction in ionic liquids: fundamentals and applications in energy and sensors. ACS Sustain. Chem. Eng. 5, 3698–3715 (2017). Article CAS Google Scholar Higgins, E. M. et al. pKas of the conjugate acids of N-heterocyclic carbenes in water. Chem. Commun. 47, 1559–...
The train uses a combination of hydrogen fuel cells and supercapacitors to replace the original catenary power supply scheme. The energy is generated by the electrochemical reaction of hydrogen and oxygen in the hydrogen fuel cells. Freed from the shackles of catenary operating conditions, the train...