Preparation of cobalt silicide on graphene as Pt electrocatalyst supports for highly efficient and stable methanol oxidation in acidic media

Zhang, Mingmei; Yan, Zaoxue; Li, Yan; Jing, Junjie; Xie, Jimin

doi:10.1016/j.electacta.2015.01.221

Cited by 26 publications

(11 citation statements)

References 41 publications

(45 reference statements)

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“…As seen from band from 290 nm to 300 nm can be attributed to the n [23,24], consistent with the findings reported by Gupta et al [25] and Luo et al [26]. Raman spectroscopy is a powerful nondestructive technique and is a very useful optical approach to distinguish the ordered and disordered structure of carbonaceous materials [27,28]. The Raman spectrum of graphene oxide is shown in Fig.…”

Section: Characterizations Of Gosupporting

confidence: 88%

Graphene oxide exhibits differential mechanistic action towards Gram-positive and Gram-negative bacteria

Pulingam

Thong

Ali

et al. 2019

Colloids and Surfaces B: Biointerfaces

113

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Section: Characterizations Of Gosupporting

confidence: 88%

Graphene oxide exhibits differential mechanistic action towards Gram-positive and Gram-negative bacteria

Pulingam

Thong

Ali

et al. 2019

Colloids and Surfaces B: Biointerfaces

113

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“…It has been successfully used to synthesize topological MSi materials, which have soared lately in the condensed matter physics field. [ 24–29 ] We were not only able to fabricate the previously reported RuSi more readily but also successfully synthesized the TiSi electrocatalyst for the first time. Moreover, we extensively explored 8 MSi as HER catalysis.…”

Section: Introductionmentioning

confidence: 98%

Discovery and Facile Synthesis of a New Silicon Based Family as Efficient Hydrogen Evolution Reaction Catalysts: A Computational and Experimental Investigation of Metal Monosilicides

Wang

Zhang

et al. 2021

Small

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A new family of transition‐metal monosilicides (MSi, M = Ti, Mn, Fe, Ru, Ni, Pd, Co, and Rh) electrocatalysts with superior electrocatalytic performance of hydrogen evolution is reported, based on the computational and experimental results. It is proposed that these MSi can be synthesized within several minutes by adopting the arc‐melting method. The previously reported RuSi is not only fabricated more readily but eventually explored 8 MSi that can be good hydrogen evolution reaction catalysts. Silicides then can be another promising electrocatalysts family as carbides, wherein carbon has the same electronic configuration as silicon. All explored silicides electrodes exhibited low overpotentials (34–54 mV at 10 mA cm−2) with Tafel slopes from 23.6 to 32.3 mV dec−1, which are comparable to that of the commercial 20 wt% Pt/C (37 mV, 26.1 mV dec−1). First‐principles calculations demonstrated that the superior performance can be attributed to the high catalytic reactivity per site that can even function at high hydrogen coverages (≈100%) on multiple low surface energy facets. The work sheds light on a new class of electrocatalysts for hydrogen evolution, with earth‐abundant and inexpensive silicon‐based compounds.

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“…Due to the presence of gallium, oxides, and carbon on the catalyst surface, calculating the electrochemical active surface area (EASA) is a difficult task. However, it was estimated for each electrocatalyst by integrating the hydrogen desorption region (positive current) of the respective voltammograms in an acid medium in the range potential from 0.05 to 0.35 V versus RHE, obtaining the charge density into the process considering that 0.21 mC cm −2 represents the charge required to oxidize a monolayer of hydrogen on bright Pt [ 40 ] as presented in Table 3 . The contribution of capacitive current due to the double layer capacitance does not have to be subtracted because it is not possible to make such subtraction without making a big mistake.…”

Section: Resultsmentioning

confidence: 99%

Electrochemical and Morphological Investigations of Ga Addition to Pt Electrocatalyst Supported on Carbon

Paganoto¹,

Santos

Evangelista³

et al. 2017

The Scientific World Journal

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This paper is consisted in the synthesis of platinum-based electrocatalysts supported on carbon (Vulcan XC-72) and investigation of the addition of gallium in their physicochemical and electrochemical properties toward ethanol oxidation reaction (EOR). PtGa/C electrocatalysts were prepared through thermal decomposition of polymeric precursor method at a temperature of 350°C. Six different compositions were homemade: Pt50Ga50/C, Pt60Ga40/C, Pt70Ga30/C, Pt80Ga20/C, Pt90Ga10/C, and Pt100/C. These electrocatalysts were electrochemically characterized by cyclic voltammetry (CV), chronoamperometry (CA), chronopotentiometry (CP), and electrochemical impedance spectroscopy (EIS) in the presence and absence of ethanol 1.0 mol L−1. Thermogravimetric analysis (TGA), energy dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), and transmission electron microscopy (TEM) were also carried out for a physicochemical characterization of those materials. XRD results showed the main peaks of face-centered cubic Pt. The particle sizes obtained from XRD and TEM analysis range from 7.2 nm to 12.9 nm. The CV results indicate behavior typical of Pt-based electrocatalysts in acid medium. The CV, EIS, and CA data reveal that the addition of up to 31% of gallium to the Pt highly improves catalytic activity on EOR response when compared to Pt100/C.

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Preparation of cobalt silicide on graphene as Pt electrocatalyst supports for highly efficient and stable methanol oxidation in acidic media

Cited by 26 publications

References 41 publications

Graphene oxide exhibits differential mechanistic action towards Gram-positive and Gram-negative bacteria

Graphene oxide exhibits differential mechanistic action towards Gram-positive and Gram-negative bacteria

Discovery and Facile Synthesis of a New Silicon Based Family as Efficient Hydrogen Evolution Reaction Catalysts: A Computational and Experimental Investigation of Metal Monosilicides

Electrochemical and Morphological Investigations of Ga Addition to Pt Electrocatalyst Supported on Carbon

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