BnOH into BnCHO with H2 evolution

Maybe, if you break this down to layman terms,
people could join a conversation about it.

I think he's talking about using sun light to create hydrogen, but I'm no chemist. Some people think hydrogen is a cheap and easy way to make energy. Just put water and electricity together. But most hydrogen is made by using fossil fuel and it really is not very efficient. Some people think of hydrogen as being very dangerous because of the hydrogen bomb (H bomb) or the Hindenburg explosion. The Hindenburg was flying during a lightning storm and when it was grounded the charge went thru the structure. The doping compound used to keep the fabric air tight was very flammable so they are not sure how much the hydrogen was really to blame. Any fuel is very explosive, that is what makes it a good fuel. Just like gasoline vapors can explode if ignited. But if properly contained, and the cost of producing hydrogen can be managed then it could be a very good fuel source in the future.

I remember reading a trade paper which stated hydrogen fuel cells were not practical for use in public transportation markets. Something about weight and dangerous conditions which could occur during an accident.

When I was working as a retail (customer-based) mechanic I never saw FCEV systems in the shops. I did see internal combustion supported electric cars tho. During that time, all-electric vehicles were few and far apart and their maintenance was usually handled by the customer's dealer.

There is a system which captures the energy from each wheel during braking which is then stored in batteries.
I always wondered why they didn't put generators at each wheel as an electrical supplement? It would generate a charge for the batteries whenever the wheels rotated. It would decrease the need for so many charging periods.
I wonder if anything like that has since been developed?

How Fuel Cells Work

The most common type of fuel cell for vehicle applications is the polymer electrolyte membrane (PEM) fuel cell. In a PEM fuel cell, an electrolyte membrane is sandwiched between a positive electrode (cathode) and a negative electrode (anode). Hydrogen is introduced to the anode, and oxygen (from air) is introduced to the cathode. The hydrogen molecules break apart into protons and electrons due to an electrochemical reaction in the fuel cell catalyst. Protons then travel through the membrane to the cathode.

The electrons are forced to travel through an external circuit to perform work (providing power to the electric car) then recombine with the protons on the cathode side, where the protons, electrons, and oxygen molecules combine to form water.

They have hydrogen cars already on the market. However there are only 45 filling stations in the US in which 43 are in California. So currently it is not practical for most people to own one. Other countries are doing a better job at offering filling stations. I recently seen a hydrogen car for sale, it was similar to a Prius and affordable, but with out a way to fill it I would have no use for it. They are also doing commercial vehicles that would have access to their own filling stations, but like anything it takes awhile to develop things and make them main stream.

Yes.

Personally, I prefer my deuterium. But I've always said, once you add a little tritium, it becomes a delightful, in so many ways.

Imagine a world where we can live and breathe clean air around our towns and cities, where zero emissions cars and buses travel almost silently along our streets, where electricity is produced from readily stored renewable energy delivered to our homes and hot water and central heating are delivered by a 100% green fuel instead of natural gas.

This world is just around the corner...

But H2 Evaluation also Reaction..
I am not that correct expert to define it.