Metal hydrides are key intermediates in catalytic proton reduction and dihydrogen oxidation. There is currently much interest in appending proton relays near the metal centre to accelerate catalysis by proton-coupled electron transfer (PCET). However, the elementary PCET steps and the role of the pr...
Simple ionic structure types are adopted by many ternary hydrides of the type AaMmHa + 2m (A = Li–Cs, M = Mg–Ba, Eu, Yb), e.g., the perovskite-type structures. Examples of the latter are RbMgH3 (hexagonal perovskite (BaTiO3) type), NaMgH3 (orthorhombic perovskite (GdFeO3) type...
More encouragingly, these graphene-based catalysts show favorable HER activity in a wide range of pH values, in contrast to traditional metallic and nanostructured MoS2 electrocatalysts, which are active under either acidic or basic conditions. To design high-performance electrocatalysts for HER, Jiao ...
H2 ligands can also have far greater thermodynamic “and” kinetic acidity than hydrides, which is important in the ability of acidic H2 ligands to protonate substrates such as olefins and N2. Analogous increased acidity of C–H bonds in transient alkane complexes may be important in alkane ...
Halides, hydrides, and pseudohalides Main article: Alkali metal halideThe alkali metals are among the most electropositive elements on the periodic table and thus tend to bond ionically to the most electronegative elements on the periodic table, the halogens (fluorine, chlorine, bromine, iodine, ...
Preferably the phosphorized olefine polymer is first hydrolysed by treatment with water or steam and then neutralized. The basic compounds which may be used for neutralization are the oxides, hydroxides, carbonates, alcoholates, phenates, sulphides, hydrides and bicarbonates of magnesium, calcium, ...
– Compounds of nonmetals are molecular substances. – Most metal oxides are basic in water.(what are some examples?) – Most nonmetal oxides are acidic in water.(what are some examples?) Metalloids • Have some characteristics of metals, some of nonmetals. • For instance, silicon looks...
Accordingly, pre-activation can be induced via known alkylation reactions with organometallic compounds, such as organolithium or preferably organoaluminum hydrides or alkyls. Pre-activation permits one to use the support-activator in all instances for activation and eliminate use of expensive methylalumo...
In contrast to activated carbon as is used according to the invention, conventional support materials such as aluminum oxide, silicon dioxide or other mineral oxides often have acidic or basic groups which can reduce the activity of the component used, which is not the case for activated carbon....
Solutions or substantially stable dispersions of basic alkali metal sulfonates in an inert organic diluent are prepared by intimately contacting an acidic gaseous material such as carbon dioxide with a reaction mixture comprising a sulfonic acid, an alkali metal, an alcohol and a carboxylic acid. The...