Multi-Ni@Ni phyllosilicate hollow sphere for CO₂ reforming of CH₄: influence of Ni precursors on structure, sintering, and carbon resistance

Abstract

Multi-Ni@Ni phyllosilicate hollow spheres synthesized with Ni(acac)2 precursor via hydrothermal and H2 reduction method have unique pore structure and strong interaction between Ni and Ni phyllosilicate which help prevent Ni sintering and carbon deposition, yielding excellent catalytic performance for CO2 reforming of CH4 reaction.

Bimetallic Synergy Effects of Phyllosilicate‐Derived NiCu@SiO2 Catalysts for 1,4‐Butynediol Direct Hydrogenation to 1,4‐Butanediol

“…While, differently, two weak diffraction peaks that appeared at 34.1°and 60.5°attributing to the poorly-crystallized nickel phyllosilicate (Ni 3 Si 2 O 5 (OH) 4 , JCPDS 49-1859) were formed for the Ni-containing samples. [14] We believe these shell pores can help the bimetallic NiÀ Cu catalysts provide more accessible active sites for liquid-phase hydrogenation. This may result from the lack of hydroxyl groups and the interlamellar spacing after calcination, which is consistent with the previous reports.…”

“…A broad diffraction peak centered at 2θ = 22.5°is visible for all the patterns which is ascribed to the SiO 2 (JCPDS 39-1425) cores. [14] The related surface area (SA) and pore volume (Vp) of different NiCuphy@SiO 2 materials were characterized by N 2 adsorption in Figure S3 and the results are shown in Table 1. While, differently, two weak diffraction peaks that appeared at 34.1°and 60.5°attributing to the poorly-crystallized nickel phyllosilicate (Ni 3 Si 2 O 5 (OH) 4 , JCPDS 49-1859) were formed for the Ni-containing samples.…”

“…As an alteration, dispersed Ni-based supported catalysts have been reported, [9][10] however, the present Ni-based catalysts are also not ideal for BYD direct hydrogenation due to their low activity/selectivity and deactivation. In order to enhance the structural stability of Ni-based catalysts, we intended to apply a recently developed phyllosilicate-derived core-shell catalyst, [13][14] to the BYD liquid-phase hydrogenation. In order to enhance the structural stability of Ni-based catalysts, we intended to apply a recently developed phyllosilicate-derived core-shell catalyst, [13][14] to the BYD liquid-phase hydrogenation.…”

Selective steam reforming of n‐dodecane over stable subnanometric NiPt clusters encapsulated in Silicalite‐1 zeolite

“…Zeolite materials were deemed as idea supports to confine metal particles, owing to the diverse porosities, controllable synthesis process, and large surface areas . The encapsulating Ni NPs in mesoporous zeolites, thus enhancing sintering resistance, has been reported by several groups . For example, Gong et al designed a nickel phyllosilicate nanotubes catalyst for ethanol steam reforming, which showed high thermal stability of nickel nanoparticles at 650°C due to the confinement effect of phyllosilicate nanotubes, thus improving the stability and inhibiting carbon deposition .…”

“…[27][28][29][30] The encapsulating Ni NPs in mesoporous zeolites, thus enhancing sintering resistance, has been reported by several groups. 17,[31][32][33][34][35][36][37][38][39] For example, Gong et al…”