Metal-support interactions in heterogeneous catalytic hydrogen production of formic acid

Bimetallic palladium nickel nanoparticles loaded on ammonia-alkalized multi-walled carbon nanotubes for efficient dehydrogenation of formic acid

“…Beyond that, in loaded catalysts, the heterogeneous metal bond formed between the surface metal and the substrate can accelerate the transfer of electrons between the two and increase the activity of the metal sites, according to Tedsree et al 50 and Sun et al 17 In other words, charge transfer, which is typical of metal–support interactions, can modulate the electronic structure of the metal sites and change the energy barrier for C–H bond breaking in the formic acid decomposition intermediate (HCOO*), thus improving the decomposition of formic acid. 15…”

“…[10][11][12][13][14] However, in general, the homogeneous catalytic system shows poor catalytic stability, easy deactivation, not easy to be separated and recovered, and inconvenient to be used in industrial production on a large scale. 15,16 To overcome these drawbacks, multiphase-loaded catalysts have been developed in large numbers. The catalytic performance of loaded catalysts can be mainly regulated by the catalyst support, active metal, and metal nanoparticles concerning the support.…”

Hydrogen production, transportation, utilization, and storage: Recent advances towards sustainable energy

“…Formic acid (HCOOH) is the simplest member of the carboxylic group produced chemically from the hydrolysis of cellulosic biomass precursors and hydrolysis of methyl formate [86]. It is a very important hydrogen carrier with a potential for large-scale hydrogen production due to its high H2 density, low toxicity, high flash point, biodegradability, and low technical difficulty [87]. A high yield of hydrogen from formic acid (FA) decomposition is attained via two distinct pathways namely: dehydration (decarbonylation) and dehydrogenation (decarboxylation) [88] as represented by the Eqs.…”

“…Homogeneous and heterogeneous catalysts have over the last decade been developed for FA decomposition towards H2 production. Active metals from the transition series such as Rh, Ru, and Ir, and metallic complexes with phosphine-related compounds and nitrogen-related compounds act as ligands [87].…”

Enhanced Metal–Support Interfacial Interaction of Pd@FeNi-CoO Composites for Efficient Nitrate Reduction to Ammonia

“…Activated *H is often considered to be the key to increased capacity and reduced energy consumption. − Palladium (Pd)-based catalysts with high hydrogen evolution reaction (HER) activity typically exhibit low overpotential and significant NO 3 RR activity. − Transition metals (such as Fe, Co, and Ni) are inexpensive and their d-orbitals are in an unfilled state, making them susceptible to electron transfer. Their introduction can not only reduce the amount of Pd to achieve cost savings but also regulate the electron structure between different elements to promote the catalytic performance of NO 3 RR. − Besides, constructing a metal–support interface can form an enhanced metal–support interaction, which can improve the catalytic activity and significantly enhance the catalytic stability. − Therefore, there is still much room for progress in designing Pd-based catalysts with enhanced metal–support interfacial interaction for efficient and stable NO 3 RR.…”