Base-free hydrogen generation from methanol using a bi-catalytic system

Abstract

A bi-catalytic system, in which Ru-MACHO-BH and Ru(H)2(dppe)2 interact in a synergistic manner, was developed for the base-free dehydrogenation of methanol. A total TON > 4200 was obtained with only trace amounts of CO contamination (<8 ppm) in the produced gas.

Iridium–PNP Pincer Complexes for Methanol Dehydrogenation at Low Base Concentration

“…At the same time, Grützmacher and co‐workers showed the dehydrogenation of methanol by utilizing [K(dme) 2 ][RuH(trop 2 dad)] ( 1 , trop 2 dad=1,4‐bis(5H‐dibenzo[a,d]cyclohepten‐5‐yl)‐1,4‐diazabuta‐1,3‐diene) without any additives in THF (TON=540) . Later on, the first homogeneous bimetallic system based on [Ru(H)(BH 4 )(CO)(HN{CH 2 CH 2 P( i Pr) 2 } 2 )] and [Ru(H) 2 (dppe) 2 ] ( 7 ) was reported under base‐free conditions (TON=4286) . Furthermore, Milstein and co‐workers applied [Ru(H)(Cl)(CO)(NNP t Bu )] ( 6 , NNP t Bu =6‐di‐tert‐butylphosphinomethyl‐2,2′‐bipyridine) as a catalyst for this reaction and obtained a high TON (28 661) under optimized conditions .…”

Advances in Ruthenium Catalysed Hydrogen Release from C1 Storage Materials

“…A recent publication by Beller and co-workers has made a significant step towards this. This has been accomplished by using a bi-catalytic system where the synergistic benefits of the individual catalysts results in a high performance [88]. The two catalysts used, Ru-MACHO-BH and Ru(H) 2 (dppe) 2 worked by enhancing the speed of the formic acid dehydrogenation step.…”

Molybdenum carbide supported nickel–molybdenum alloys for synthesis gas production via partial oxidation of surrogate biodiesel

“…With depletion of fossil fuels, the world is slowly moving towards a hydrogen economy [1,2]. One of the major applications of hydrogen is in fuel cells, wherein the chemical energy of the fuel is directly converted into electrical energy with water as the only byproduct.…”