TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Process: The LOHC is contacted with the homogeneous redox catalyst in an aqueous hydrochloric acid solution. In the process, subsequent to the reduction of the LOHC, reduced LOHC is electrohydrogenated in the presence of the redox catalyst using protons generated by electrooxidation of water at a cathode of the direct organic fuel cell/flow battery. In the process, the transition metal is nickel and subsequent to the reduction of the LOHC, the LOHC is dehydrogenated to release energy from the direct organic fuel cell/flow battery. The LOCH is dehydrogenated in the presence of nanoparticles of nickel oxide in solution or as a solid at an anode of the direct organic fuel cell/flow battery. The dehydrogenated LOHC is subsequently electrohydrogenated in the presence of the redox catalyst using protons generated by electrooxidation of water at a cathode of the direct organic fuel cell/flow battery. The LOHC is a partially or fully hydrogenated, nitrogen-containing aromatic heterocycle. Preferred Components: In the ligand complex: the group 10 transition metal is nickel, palladium, platinum or darmstadtium; and there are two coordinating groups, each of which is a halogen, preferably bromine. The pincer ligand complex (A1) is of formula (I), preferably (N,N'E,N,N'E)-N,N'-(1,1'-(pyridine-2,6-diyl)bis(ethan-1-yl-1-ylidene))bis(2,6-dimethylaniline)-nickel dibromide complex, (N,N'E,N,N'E)-N,N'-(1,1'-(pyridine-2,6-diyl)bis(ethan-1-yl-1-ylidene))bis(2,6-diisopropylaniline)-nickel dibromide complex, 2,6-di(1,8-naphthyridin-2-yl)pyridine-nickel dibromide complex, 2,6-di(1,6-naphthyridin-2-yl)pyridine-nickel dibromide complex, 2-(pyrido(2,3-b)pyrazin-6-yl)-6-(pyrido(3,2-b)pyrazin-6-yl)pyridine-nickel dibromide complex or 2,6-di(quinolin-2-yl)pyridine-nickel dibromide complex of formula (III).    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The partially or fully hydrogenated, nitrogen-containing aromatic heterocycle comprises decalin, 2-aminopyridine, 4-methylpyrimidine, dipyrimidine methane, dimethyltetrazine, dipyrimidine, diazacarbazole, alkylcarbazole, 4-aminopyridine, dipyrazinemethane, tripyrazinemethane, tripyrazineamine, dipyrazine, tetrazacarbazole, isoquinoline, di(2-pyridyl)amine, quinazoline, perhydro-N-ethylcarbazole, tetrahydroisoquinoline, perhydro-dibenzofuran, perhydro-indole, N-methyl perhydro-indole, 4,4'-bipiperidine, 4-amino-methylpyrimidine and/or aminomethylcyclohexane. In the composition, the heterocycle is 1,2,3,4-tetrahydroquinaldine, 2,3-dimethyltetrahydroquinoxaline (both preferred), decalin, 2-aminopyridine, 4-methylpyrimidine, dipyrimidinemethane, dimethyltetrazine, dipyrimidine, diazacarbazole, alkylcarbazole, 4-aminopyridine, dipyrazinemethane, tripyrazinemethane, tripyrazineamine, dipyrazine, tetrazacarbazole, isoquinoline, di(2-pyridyl)amine, quinazoline, perhydro-N-ethylcarbazole, tetrahydroisoquinoline, perhydro-dibenzofuran, perhydro-indole, N-methyl perhydro-indole, 4,4'-bipiperidine, 4-amino-methylpyrimidine and/or aminomethylcyclohexane.x = 1-3. EXAMPLE - No suitable example given.