Incorporation of silicon atoms into nickel nanoparticles boosts the catalytic activity for (de)hydrogenation reactions.

Formic acid dehydrogenation (FAD) is considered as a promising process in the context of hydrogen storage.

Complexes Ru(H)(Cl)(CO)(HN{CH2CH2P(iPr)2}2) 7 and Ru(H)(Cl)(CO)(CH3N{CH2CH2P(iPr)2}2) 8 were compared for the selective dehydrogenation (DH) of formic acid (FA) at different pH values. Remarkably, highest activities were observed in acidic environment (pH 4.5). Under all investigated conditions, the N‐methylated complex 8 showed improved performance compared to 7. These observations can be mechanistically explained with protonation of 4H/3Me being the key step in formic acid DH for both complexes.

Nickel catalyst for hydrogen storage in N-heterocycles: a heterogeneous nickel catalyst promotes both hydrogenation and subsequent dehydrogenation of quinoline derivatives.

An ovel state-of-the-art bicatalytic system for hydrogen generation from aqueous methanol at low temperature and base concentration is described. Applying two molecularly defined ruthenium complexes A and B3 for methanold ehydrogenation at the same time under the same conditions, as ynergistic effect is observed. This behavior is explained by the increaseo ft he dehydrogenation of formic acid, which is formed as an intermediate, by the second catalyst B3.

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The Cover Feature shows how N‐Me Ru pincer complex “outweighs” its N‐H analogue in the hydrogen generation reaction from formic acid. In their Full Paper, A. Agapova et al. compared the reactivity of two ruthenium PNP catalysts for the dehydrogenation of formic acid at different pH values. Under all investigated conditions, the N‐methylated complex showed improved performance compared to non‐methylated one, and the highest TOF was observed in acidic environment. More information can be found in the Full Paper by A. Agapova et al. on page 1911 in Issue 7, 2019 (DOI: 10.1002/cctc.201801897).

Ruthenium pincer complexes for hydrogen generation: The extended concept of tandem and cascade catalysis for the organic transformations has been explored in this paper. Methanol aqueous‐phase reforming (APR) process was used as a real‐life application example for the multicatalytic cascade reactions. A novel state‐of‐the‐art bicatalytic system applying two molecularly defined ruthenium complexes for hydrogen generation from methanol at low temperature and base concentration is described in this Concept by M. Beller et al. on page 9345 ff.