Insight into Mn enhanced short-chain olefins selectivity in CO2 hydrogenation over Na-CuFeO2 catalyst

Polyoxometalate-HKUST-1 composite derived nanostructured Na–Cu–Mo2C catalyst for efficient reverse water gas shift reaction

“…The formation of additional basic sites in the presence of Na is consistent with previously reported works. 13,55 As a result, we can infer the following sequence of increases in CO 2 adsorption ability: Mo 2 C < Cu–Mo 2 C < Na–Cu–Mo 2 C.…”

“…The formation of additional basic sites in the presence of Na is consistent with previously reported works. 13,55 As a result, we can infer the following sequence of increases in CO 2 adsorption ability: Mo 2 C < Cu-Mo 2 C < Na-Cu-Mo 2 C. Fig. 5(a-f ) depict the TEM images of the Na-Cu-Mo 2 C catalyst for investigating detailed nanostructured information.…”

“…One potential effect of integrating alkali metals is an increased CO 2 adsorption capacity, accelerating electron transfer and improving interactions with CO 2 molecules. 13 Xu et al demonstrated that K incorporation on Cu/ β-Mo 2 C resulted in a significant increase in CO 2 conversion compared to Cu/β-Mo 2 C. 14 Similarly, Zhang et al reported that the Cs incorporation enhanced the CO 2 conversion and CO selectivity in Cu/β-Mo 2 C catalysts. 15 Recently published results suggest that MOFs (Metal-Organic Frameworks) are interesting precursors for the synthesis of nano-porous carbides as heterogeneous catalysts.…”

Ni–N synergy enhanced the synthesis of formic acid via CO2 hydrogenation under mild conditions

“…Our group consistently strives to develop value-added chemicals and fuels by CO 2 hydrogenation and has achieved milestones to produce syn-gas and light olefins utilizing transition metal-based catalyst including Co, Fe, Cu, and Mo. [34][35][36][37] In search of a suitable catalyst, we were intrigued by a lower percentage of Ni catalyst incorporation on nitrogen-doped TiO 2 for the CO 2 hydrogenation to FA with a conversion of 11.29% with a selectivity of more than 99% in aqueous medium. A turnover number (TON) of 757 for formic acid was obtained under industrially relevant conditions (T = 353 K, P = 6.0 MPa) in 20 h. Moreover, the positive impact of nitrogen doping on enhancing the yield of formic acid was extensively elaborated.…”

Comparative Study of Short-Chain Olefins Synthesis via CO2 Hydrogenation over Iron-Containing Double Metal Cyanide-Derived Catalysts

“…Alkali metals (Na or K) and a 3d transition metal (Mn, Co, Cu, or Zn) are commonly used promoters for the iron-based catalysts to achieve a high conversion of CO 2 and high short-chain olefins selectivity. − Alkali metals increase the stability of Fe 5 C 2 and prevent the hydrogenation of olefins by increasing electron density at active sites, raising olefinic content in hydrocarbons with low methane and a high O/P ratio. Furthermore, alkali metals also improve CO 2 conversion by increasing the basic sites of the catalysts .…”