Catalytic applications of hydrotalcite-like materials and their derived forms

Abstract

Hydrotalcite-like (HT-like) materials have been studied extensively in the last three decades. Although these materials initially perceived as potential anion exchangers, unrelenting efforts have also been attempted to use them as catalytic materials or as catalytic supports. There are varied ways by which one can use them for catalysis viz.; 1. Use them in as-synthesized form 2. Use them after calcining where the structural integrity of layered lattice is lost 3. Use the interlayer as functional spaces with moieties of catalytic interest 4. Use them after destruction or delamination and restructuring and 5. Use them as support or matrix. In this review, we are reporting the catalytic applications of HT-like materials and their derived forms carried out in our research group for the last 15 years in these various ways, covering reactions such as nitrous oxide decomposition, selective oxidation of organic compounds of industrial relevance and base-catalyzed isomerization of chemicals of perfumery interest. Although this review primarily focuses on our work, wherever applicable, related or relevant works from other groups are also presented to bestow comprehensiveness.

Graphene-oxide-supported CuAl and CoAl layered double hydroxides as enhanced catalysts for carbon-carbon coupling via Ullmann reaction

“…LDH-based materials display great potential as heterogeneous catalyst due to their versatility given by the possibility of incorporation of various catalytically-active transition metal species (e.g., Cu, Co, Fe, Ni, V, Rh), the strong alkaline nature and an easy separation of the products [1][2][3]. In particular, LDHs have been intensively investigated in recent years as catalysts and catalyst supports [4,5] in many aspects, such as organic synthesis, (photo) degradation of organic wastes, greenhouse gas control emission and H2 production [6][7][8][9][10][11][12][13].…”

Phosphate uptake behavior of ZnAlZr ternary layered double hydroxides through surface precipitation

“…During the last three decades, extensive research has been done on the synthesis and applications of hydrotalcitelike materials. Recently the LDHs are received incisive attention in catalysis [16,17], pharmaceuticals [18,19], polymer blends [20,21], adsorbents [22,23] and ion-exchangers [24,25]. Hydrotalcite-like materials were found to be selective adsorbents for the removal of phosphate from sea water [26,27].…”

Surface Characterization of Ni-Mg-Al and Co-Mg-Al Hydrotalcites by Inverse Gas Chromatography

“…[1,2]. Metal hydroxide with divalent and trivalent metal ions, with adjustable degeneration, can form hydrotalcite with catalytic activity by introducing with transition metal ions, such as Cu 2+ , Ni 2+ , Co 2+ , etc.…”