Ni 3Fe provided the highest TOF CH4 out of all bimetallic catalysts and the monometallic Ni one. Linear correlation was observed between the d-density of states at the Fermi level (N EF) and TOF CH4 based on DFT calculations.

U. Daiminger, W. Lind, Adsorption Processes for Natural Gas Treatment (Engelhard Corp, USA, 2004), p. 14 Adding Ru in 10% Ni/CeO 2-ZrO 2 increased the CO 2 methanation performance. When ruthenium acetylacetonate was used instead of ruthenium chloride as the precursor salt, the metal dispersion and catalytic activity were enhanced due to the templating effect of the precursor salt molecule.Among all metals, Fe is by far the most studied element in bimetallic Ni-based catalysts for CO 2 methanation, since it is quite cheap and highly available and it exhibits a high solubility into the Ni lattice, favouring the formation of NiFe alloys [ 25]. It has been suggested, based on computational screening and catalytic experiments, that alumina supported and Ni-rich NiFe catalysts can improve the rate of CO 2 conversion, with the optimal Ni/(Ni + Fe) ratio being around 0.7–0.9 [ 40, 41]. Many more works have focused on NiFe alloys prepared with different methods and supported on various metal oxides [ 42]. Generally, the Ni/Fe ratio in the alloy and the reducibility of the metal-oxide support appear to be the most critical parameters that determine whether Fe will promote or suppress the catalyst’s CO 2 methanation activity. This view has been adapted to work with screen readers and braille display, and is keyboard operated. KO C H, FAN C, CHIANG P N, et al. P-nitrophenol, phenol and aniline sorption by organo-clays[J]. Journal of Hazadrous Materials, 2007, 149(2): 275-282. doi: 10.1016/j.jhazmat.2007.03.075

Cu addition improved Ni dispersion and reducibility and NiCu alloys were formed. Cu introduction also decreased CO 2 conversion and CH 4 selectivity, favouring instead the production of CO via the reverse water–gas shift (RWGS) reaction. Audio, A / V and Navigation Head Unit, Low Voltage DC Converter (Audio / Amplifier), A / C Control Module, Electro Chrome Mirror, Lower Panel Center Switch, Driver IMS Control Module, Left / Right Rear Seat Heater, Front air Ventilation control module, front seat heater control module Fenton技术，EF)被认为是一种高效且环保的降解方法 [ 5]，其可直接在阴极还原O 2生成H 2O 2 [ 6]，避免了H 2O 2的运输和储存 [ 7]，而后加入Fe 2+催化生成的H 2O 2进一步分解为·OH，有机物(R)最终被·OH氧化降解 [ 8]。Li et al. [ 32] synthesized an effective CO 2 methanation catalyst composed of NiPd alloys supported on an SBA-15 mesoporous siliceous support. There was a strong synergetic effect between the two metals, as evidenced by H 2-TPR, and this synergy led to the bimetallic NiPd catalysts exhibiting enhanced CO 2 conversion compared to the monometallic Pd and Ni catalysts. The content of Ni and Pd in the alloy was also varied and it was shown that the Ni 0.75Pd 0.25 alloy with a Ni/Pd molar ratio of three led to the best results. This novel synthesis method, using an intermediate silica carrier to disperse Ru, yielded fine Ru nanoparticles supported on Ni grains. The 1.5% Ru/Ni catalyst had an oxide passivation layer and a very high low-temperature catalytic activity.