Efficient Dual-Site Carbon Monoxide Electro-Catalysts via Interfacial Nano-Engineering

Abstract

Durable, highly efficient, and economic sound electrocatalysts for CO electrooxidation (COE) are the emerging key for wide variety of energy solutions, especially fuel cells and rechargeable metal−air batteries. Herein, we report the novel system of nickel−aluminum double layered hydroxide (NiAl-LDH) nanoplates on carbon nanotubes (CNTs) network. The formulation of such complexes system was to be induced through the assistance of gold nanoparticles in order to form dual-metal active sites so as to create a extended Au/NiO two phase zone. Bis (trifluoromethylsulfonyl)imide (NTf2) anion of ionic liquid electrolyte was selected to enhance the CO/O2 adsorption and to facilitate electro-catalyzed oxidation of Ni (OH)2 to NiOOH by increasing the electrophilicity of catalytic interface. The resulting neutral catalytic system exhibited ultra-high electrocatalytic activity and stability for CO electrooxidation than commercial and other reported precious metal catalysts. The turnover frequency (TOF) of the LDH-Au/CNTs COE catalyst was much higher than the previous reported other similar electrocatalysts, even close to the activity of solid-gas chemical catalysts at high temperature. Moreover, in the long-term durability testing, the negligible variation of current density remains exsisting after 1000 electrochemistry cycles.

NiFeCr Hydroxide Holey Nanosheet as Advanced Electrocatalyst for Water Oxidation

“…15 This is quite different from the previously reported Ni-based OER catalyst, where high oxidation valence and the shift to higher binding energy are usually observed. 16 However, the lower oxidation valence state of the Ni sites (<+3) has been reported to be more favorable for oxygen evolution reaction. 17,18 Herein, although the absolute intensity of peak Ni 2p3/2 decreased, the relative intensity ratio of the Ni 2p3/2 peak to the Ni 2p3/2 satellite peak before (0.749) and after etching (0.741) is still close to each other.…”

Microstructure of injection moulding machine mould clamping mechanism: design and motion simulation

“…E 1 = 2.09 × 10 5 N/mm 2 , E 2 = 1.62 × 10 5 N/mm 2 , S 1 = 2080 mm 2 , S 2 = 5257.08 mm 2 , n 1 = 4, and n 2 =2 For each parameter, (21), (22), and (23) were implemented in MATLAB, yielding the following solutions: ΔL 1 = 0.034 mm, ΔL 2 = 0.06 mm, g 0 = 3.95, and the compression deformation length L 1 ′ = 158-0.034 = 157.96 mm mould in place before the elbow and large rod, L 2 ′ = 205-0.06 = 204.94 mm.…”

“…Such rationalisation in complex mechanical motions can be synthesised by various building blocks. In addition, new materials, such as carbon materials [15], polymers [16][17][18], nanomaterials, and nanocomposites [19][20][21][22], play more and more important role in our lives, so it is significant to develop injection moulding machines with better performance and could be applied to new materials. In order to realise the intelligent machining and processing, the fundamental understanding of laws of mechanics/ physics take on greater significance in the moulds development process.…”

Self‐regulation in chemical and bio‐engineering materials for intelligent systems

“…Various methods have been used to regulate characteristics of materials in both the chemical and chemical engineering industries in recent years [1][2][3][4][5][6], which regulate the hydrophobic [7][8][9][10], antibiotic [11][12][13][14][15], radical polymerisation [16][17][18][19][20], electrical conductivity [21][22][23], thermal conductivity [23,24], and mechanochemical properties [25][26][27][28][29][30][31] within porous, biological, polymer, and photoelectric materials. The materials, which have the ability to regulate above characteristics, could be allowed to be utilised in many different and innovative applications [32][33][34]. Moreover, these applications will have very positive impacts and change their respective industries [35][36][37][38].…”