Being a zero-carbon source, the hydrogen economy is considered to be better than the fuel econom... more Being a zero-carbon source, the hydrogen economy is considered to be better than the fuel economy as it produces water vapours during complete combustion. Still, it suffers from two major drawbacks such as production of green hydrogen from sustainable resources, and the storage and transportation of hydrogen. The use of liquid organic hydrogen carriers (LOHC) such as alcohols, amines, etc, was found to be a better and more secure way to store and transport hydrogen. Hydrogenation and dehydrogenation reactions are the best way to load and unload hydrogen from LOHCs. Here, in this article, we calculated the amount of hydrogen gas produced during the catalytic dehydrogenative oxidation of LOHCs like alcohols using the gas burette method. The catalytic dehydrogenative oxidation of alcohols is done using a well-defined [Ru(p-cym)HMTA]Cl2 complex with a catalyst loading of 0.5 mol%. Different substrates of alcohols were explored for the estimation of hydrogen released during the reaction. A comparison was made between the released hydrogen's calculated and experimental yields.
A highly efficient, economic and environmental friendly catalyst system has been developed for th... more A highly efficient, economic and environmental friendly catalyst system has been developed for the dehydrogenation of alcohols and amines using simple RuCl 3 ÁnH 2 O and N-benzylhexamethylenetetramine. The in situ catalyst system efficiently oxidized the primary and secondary amines and secondary alcohols into nitrile, imine and ketone products, respectively in moderate to excellent yields. The developed catalyst system was also found to be efficient for the dehydrogenation of N-heterocyles. A detailed mechanism study revealed the first example of N-benzylhexamethylenetetramine (HMTA-Bz) being simultaneously acting as base, reducing agent and hydride source to generate the [Ru(II)(H) 2 ] species as the active catalyst. The mechanism studies also revealed both the alcohol and amine oxidation involves dehydrogenative pathway with the evolution of hydrogen as the only by-product. The developed catalyst system also provides possible platform for the release of hydrogen from liquid organic hydrogen carriers (LOHCs).
Being a zero-carbon source, the hydrogen economy is considered to be better than the fuel econom... more Being a zero-carbon source, the hydrogen economy is considered to be better than the fuel economy as it produces water vapours during complete combustion. Still, it suffers from two major drawbacks such as production of green hydrogen from sustainable resources, and the storage and transportation of hydrogen. The use of liquid organic hydrogen carriers (LOHC) such as alcohols, amines, etc, was found to be a better and more secure way to store and transport hydrogen. Hydrogenation and dehydrogenation reactions are the best way to load and unload hydrogen from LOHCs. Here, in this article, we calculated the amount of hydrogen gas produced during the catalytic dehydrogenative oxidation of LOHCs like alcohols using the gas burette method. The catalytic dehydrogenative oxidation of alcohols is done using a well-defined [Ru(p-cym)HMTA]Cl2 complex with a catalyst loading of 0.5 mol%. Different substrates of alcohols were explored for the estimation of hydrogen released during the reaction. A comparison was made between the released hydrogen's calculated and experimental yields.
A highly efficient, economic and environmental friendly catalyst system has been developed for th... more A highly efficient, economic and environmental friendly catalyst system has been developed for the dehydrogenation of alcohols and amines using simple RuCl 3 ÁnH 2 O and N-benzylhexamethylenetetramine. The in situ catalyst system efficiently oxidized the primary and secondary amines and secondary alcohols into nitrile, imine and ketone products, respectively in moderate to excellent yields. The developed catalyst system was also found to be efficient for the dehydrogenation of N-heterocyles. A detailed mechanism study revealed the first example of N-benzylhexamethylenetetramine (HMTA-Bz) being simultaneously acting as base, reducing agent and hydride source to generate the [Ru(II)(H) 2 ] species as the active catalyst. The mechanism studies also revealed both the alcohol and amine oxidation involves dehydrogenative pathway with the evolution of hydrogen as the only by-product. The developed catalyst system also provides possible platform for the release of hydrogen from liquid organic hydrogen carriers (LOHCs).
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