In situ growth of nickel selenide nanowire arrays on nickel foil for methanol electro-oxidation in alkaline media

Luo, Qiong; Peng, Mingying; Sun, Xuping; Asiri, Abdullah M.

doi:10.1039/c5ra12275a

Cited by 39 publications

(14 citation statements)

References 35 publications

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“…Among the several alternative materials proposed to replace noble metals as MOR catalysts, Ni offers the highest cost‐effectiveness. A plethora of Ni [12–14] and Ni‐based catalysts, including oxides/hydroxides, [15–17] metal alloys, [18–23] phosphides, [24] chalcogenides, [25] and nitrides, [26] have been developed and tested toward MOR. Surprisingly, the nickel carbide, which a priori offers suitable properties as electrocatalysts, for example, stability, electrical conductivity and element abundance, has not been tested toward MOR.…”

Section: Figurementioning

confidence: 99%

Selective Methanol‐to‐Formate Electrocatalytic Conversion on Branched Nickel Carbide

et al. 2020

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A methanol economy will be favored by the availability of low‐cost catalysts able to selectively oxidize methanol to formate. This selective oxidation would allow extraction of the largest part of the fuel energy while concurrently producing a chemical with even higher commercial value than the fuel itself. Herein, we present a highly active methanol electrooxidation catalyst based on abundant elements and with an optimized structure to simultaneously maximize interaction with the electrolyte and mobility of charge carriers. In situ infrared spectroscopy combined with nuclear magnetic resonance spectroscopy showed that branched nickel carbide particles are the first catalyst determined to have nearly 100 % electrochemical conversion of methanol to formate without generating detectable CO2 as a byproduct. Electrochemical kinetics analysis revealed the optimized reaction conditions and the electrode delivered excellent activities. This work provides a straightforward and cost‐efficient way for the conversion of organic small molecules and the first direct evidence of a selective formate reaction pathway.

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Section: Figurementioning

confidence: 99%

Selective Methanol‐to‐Formate Electrocatalytic Conversion on Branched Nickel Carbide

et al. 2020

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“…4) Scrupulously building transition‐metal oxides or hydroxides based multi‐stage nanoarray architecture on foams. Notably other than these metal oxide or hydroxide nanoarrays, transition‐metal phosphide and chalcogenide nanoarrays such as CoP nanowire arrays on carbon cloth and NiSe nanowire arrays on Ni foil have also been reported that they could efficiently catalyze the MOR. Moreover, recent work done by Li and co‐workers shows that coupling CoP with Pd to build 3 D Copepod hybrid nanosheet arrays on carbon fiber cloth could serve as an integrated electrode to catalyze the electro‐oxidation of ethanol in a basic medium with ultra‐high catalytic activity and excellent stability .…”

Section: Direct Methanol Fuel Cellsmentioning

confidence: 99%

Design and Application of Foams for Electrocatalysis

et al. 2017

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Developing low cost and efficient anode and cathode materials toward electrocatalysis are regarded as one of the most desirable yet challenging research directions, which are intimately related to the pressing energy, environmental and human health issues. Currently, 3 D foam (such as Ni foam, Cu foam, and graphene foam) based heterogeneous catalysts have been intensively explored for actively catalyzing the electrode reactions. Their inherent characteristics of stereo‐network structure, high specific area and large pore volume not only provide better mass transport of reactants to electrode surfaces, but also pave 3 D electron transport pathways. Herein, recent significant progress and rational design of foam‐based electrocatalysts are reviewed. In addition, some insights into current challenges and future directions of foams for efficient electrocatalysis are proposed and discussed.

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“…The resulting compound showed much higher electrocatalytic activity for methanol oxidation than pure Ni salen A due to an identified synergetic effect [11,12]. Peng et al developed a simple solvothermal method for in situ growth of Ni-Se nanowire arrays on Ni foil [13], then through a hydrothermal process/annealing treatment first synthesized the hierarchical nickel oxide nanosheet@nanowire arrays on nickel foam (NiO NS@NW/NF). Notably, these catalysts all exhibited high electrocatalytic activity and stability [14].…”

Section: Introductionmentioning

confidence: 99%

New Insights into the Electrocatalytic Mechanism of Methanol Oxidation on Amorphous Ni-B-Co Nanoparticles in Alkaline Media

Zhang

et al. 2019

Catalysts

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Despite an increased interest in sustainable energy conversion systems, there have been limited studies investigating the electrocatalytic reaction mechanism of methanol oxidation on Ni-based amorphous materials in alkaline media. A thorough understanding of such mechanisms would aid in the development of amorphous catalytic materials for methanol oxidation reactions. In the present work, amorphous Ni-B and Ni-B-Co nanoparticles were prepared by a simple chemical reduction, and their electrocatalytic properties were investigated by cyclic voltammetry measurements. The diffusion coefficients (D0) for Ni-B, Ni-B-Co0.02, Ni-B-Co0.05, and Ni-B-Co0.1 nanoparticles were calculated to be 1.28 × 10−9, 2.35 × 10−9, 4.48 × 10−9 and 2.67 × 10−9 cm2 s−1, respectively. The reaction order of methanol in the studied transformation was approximately 0.5 for all studied catalysts, whereas the reaction order of the hydroxide ion was nearly 1. The activation energy (Ea) values of the reaction were also calculated for the Ni-B and Ni-B-Co nanoparticle systems. Based on our kinetic studies, a mechanism for the methanol oxidation reaction was proposed which involved formation of an electrocatalytic layer on the surface of amorphous Ni–B and Ni-B-Co nanoparticles. And methanol and hydroxide ions could diffuse freely through this three-dimensional porous conductive layer.

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In situ growth of nickel selenide nanowire arrays on nickel foil for methanol electro-oxidation in alkaline media

Abstract: NiSe nanowire arrays solvothermally grown on nickel foil behave as an efficient 3D anode for electro-catalytic oxidation of methanol in alkaline media with strong durability.

Cited by 39 publications

References 35 publications

Selective Methanol‐to‐Formate Electrocatalytic Conversion on Branched Nickel Carbide

Selective Methanol‐to‐Formate Electrocatalytic Conversion on Branched Nickel Carbide

Design and Application of Foams for Electrocatalysis

New Insights into the Electrocatalytic Mechanism of Methanol Oxidation on Amorphous Ni-B-Co Nanoparticles in Alkaline Media

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