Nanoporous nickel-copper-phosphorus amorphous alloy film for methanol electro-oxidation in alkaline medium

Yuan, Lin-Shan; Zheng, Yangong; Jia, Meng-Lu; Zhang, Shujin; Wang, Xiulin; Peng, Cheng

doi:10.1016/j.electacta.2014.12.055

Cited by 76 publications

(19 citation statements)

References 53 publications

(55 reference statements)

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“…The D was found to be 2.89×10 −8 cm 2 s −1 for the Ni 0.75 Cu 0.25 electrode (Supporting Information, Figure S14 c). It is important to note that this D value is far more than the reported values on the nanoporous Ni‐Cu‐P alloy (3.65×10 −10 cm 2 s −1 ) and the Ni‐B nanoparticles modified nanoporous Cu electrode (4.81×10 −9 cm 2 s −1 ) . Moreover, this D value is also 3 times and more than two orders of magnitude higher than the Ni 0.50 Cu 0.50 and Ni 0.25 Cu 0.75 electrodes (8.63×10 −9 cm 2 s −1 and 1.34×10 −10 cm 2 s −1 , respectively).…”

Section: Figurementioning

confidence: 63%

Highly Branched Metal Alloy Networks with Superior Activities for the Methanol Oxidation Reaction

et al. 2017

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Three-dimensional (3D) interconnected metal alloy nanostructures possess superior catalytic performance owing to their advantageous characteristics, including improved catalytic activity, corrosion resistance, and stability. Hierarchically structured Ni-Cu alloys composed of 3D network-like microscopic branches with nanoscopic dendritic feelers on each branch were crafted by a facile and efficient hydrogen evolution-assisted electrodeposition approach. They were subsequently exploited for methanol electrooxidation in alkaline media. Among three hierarchically structured Ni-Cu alloys with different Ni/Cu ratios (Ni Cu , Ni Cu , and Ni Cu ), the Ni Cu electrode exhibited the fastest electrochemical response and highest electrocatalytic activity toward methanol oxidation. The markedly enhanced performance of Ni Cu eletrocatalyst can be attributed to its alloyed structure with the proper Ni/Cu ratio and a large number of active sites on the surface of hierarchical structures.

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Section: Figurementioning

confidence: 63%

Highly Branched Metal Alloy Networks with Superior Activities for the Methanol Oxidation Reaction

et al. 2017

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“…At the same time, the anodic peak potentials exhibited a positive shift, whereas the cathodic peak potentials experienced a negative shift. The peak currents were proportional to the square root of the scan rates (v 1/2 ), demonstrating a diffusion-controlled process [18]. The diffusion coefficient (D o ) of the rate-limiting hydroxyl ion was obtained from the classical Randles-Sevcik equation as follows:…”

Section: Electrochemical Performancementioning

confidence: 99%

“…Therefore, over the past 10 years, Ni-B and Ni-P amorphous materials with more unsaturated atoms have been increasingly recognized as desirable catalysts in the field of methanol oxidation. Amorphous Ni-B and Ni-Cu-P alloys, for example, exhibited superior catalytic stability for methanol oxidation compared to Ni-based crystalline materials [17,18]. Also, the Ni-B films showed higher electrocatalytic activity for methanol oxidation than Pt/C electrodes [19].…”

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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“…The MOR mechanism involved two processes: (i) electrocatalyst's active sites can adsorb MeOH, and (ii) subsequently oxygen was gotten by separating the H 2 O [113] . For Mn, the possible MOR mechanism can be explained by the following reaction: [114,115]

true {normalM normaln ((), O, H)}_{2} + {normalO normalH}^{-} \to normalM normaln normalO normalO normalH + H_{2} normalO + {normale}^{-}

true {normalM normaln normalO normalO normalH + normalC normalH}_{3} normalO normalH + \frac{5}{4} O_{2} \to M n (O H)_{2} + {normalC normalO}_{2} + \frac{3}{2} H_{2} normalO

…”

Section: Classification Of Catalystsmentioning

confidence: 99%

Research Progress on Catalysts for the Electrocatalytic Oxidation of Methanol

Ding

Dong

Tang³

2020

ChemistrySelect

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The methanol oxidation reaction has high energy density and the product is non-toxic and harmless (CO 2 , H 2 O), making it become one of the targets of new fuel energy. To maximize the efficiency of the reaction, its key lies in the development of highly efficient catalysts. In this paper, we reviewed the types of methanol electrocatalytic oxidation catalysts in recent years, some new preparation methods, and the reaction mechanism of different types of catalyst systems, and discussed their structure-activity relationships, laying the foundation for the development of highly efficient new catalysts in the future. And this paper is included on the types of catalysts (Pt-based catalyst, Ni-based catalyst, and other transition metal-based catalyst) and preparation methods (Reduction method, sol-gel method, in-situ method), and discussed the catalytic mechanism which mainly starts from two aspects, one is adsorptiondesorption, the other is the bond between the catalyst, methanol, and the medium. Finally, the future challenges and opportunities of the electrocatalytic oxidation of methanol are discussed.

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Nanoporous nickel-copper-phosphorus amorphous alloy film for methanol electro-oxidation in alkaline medium

Cited by 76 publications

References 53 publications

Highly Branched Metal Alloy Networks with Superior Activities for the Methanol Oxidation Reaction

Highly Branched Metal Alloy Networks with Superior Activities for the Methanol Oxidation Reaction

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

Research Progress on Catalysts for the Electrocatalytic Oxidation of Methanol

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