Synthesis of Pt-Ni (trace)/GNs composite and its bi-functional electrocatalytic properties for MOR and ORR

Liu, Ying; Li, Zhongshui; Xu, Shuhong; Xie, Yixin; Ye, Yixiang; Zou, Xiaohuan; Lin, Shen

doi:10.1016/j.jcis.2019.07.052

Cited by 33 publications

(12 citation statements)

References 59 publications

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“…For example, Li et al reported Cu-Ni@Pt-Cu core@shell NPs as efficient MOR catalysts with a high mass activity (MA) of 0.99 A mg Pt −1 [ 11 ]. Alternatively, Pt-Ni supported on graphene also displayed good MOR activity in previous reports [ 10 , 13 ]. Another effective approach is to introduce a second oxyphilic metal, such as Ru, In and Sn, to adsorb hydroxyl species and to oxidate the adsorbed CO, which is referred to as a bifunctional effect [ 14 , 15 , 16 , 17 , 18 ].…”

Section: Introductionmentioning

confidence: 61%

Hierarchical Pt-In Nanowires for Efficient Methanol Oxidation Electrocatalysis

Zou

Song

2023

Molecules

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Direct methanol fuel cells (DMFC) have attracted increasing research interest recently; however, their output performance is severely hindered by the sluggish kinetics of the methanol oxidation reaction (MOR) at the anode. Herein, unique hierarchical Pt-In NWs with uneven surface and abundant high-index facets are developed as efficient MOR electrocatalysts in acidic electrolytes. The developed hierarchical Pt89In11 NWs exhibit high MOR mass activity and specific activity of 1.42 A mgPt−1 and 6.2 mA cm−2, which are 5.2 and 14.4 times those of Pt/C, respectively, outperforming most of the reported MORs. In chronoamperometry tests, the hierarchical Pt89In11 NWs demonstrate a longer half-life time than Pt/C, suggesting the better CO tolerance of Pt89In11 NWs. After stability, the MOR activity can be recovered by cycling. XPS, CV measurement and CO stripping voltammetry measurements demonstrate that the outstanding catalytic activity may be attributed to the facile removal of CO due to the presence of In site-adsorbing hydroxyl species.

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Section: Introductionmentioning

confidence: 61%

Hierarchical Pt-In Nanowires for Efficient Methanol Oxidation Electrocatalysis

Zou

Song

2023

Molecules

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“…Actually, it is difficult to find a catalytic single material capable of promoting both ORR and MOR, without deactivation of the ORR activity in the presence of methanol. It is worth outlining that many papers have described materials having both good ORR and MOR activities, for instance [13][14][15][16][17][18][19][20] to quote a few. But none of these have demonstrated methanol tolerance during the ORR process, by really performing ORR study in the presence of methanol.…”

Section: Introductionmentioning

confidence: 99%

Chemical Surface Grafting of Pt Nanocatalysts for Reconciling Methanol Tolerance with Methanol Oxidation Activity

Lenne

Mattiuzzi²,

Jabin

et al. 2023

ChemSusChem

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A conceptual challenge toward more versatile direct methanol fuel cells (DMFCs) is the design of a single material electrocatalyst with high activity and durability for both oxygen reduction reaction (ORR) and methanol oxidation reaction (MOR). This requires to conciliate methanol tolerance not to hinder ORR at the cathode with a good MOR activity at the anode. This is especially incompatible with Pt materials. We tackled this challenge by deriving a supramolecular concept where surface-grafted molecular ligands regulate the Pt-catalyst reactivity. ORR and MOR activities of newly reported Ptcalix[4]arenes nanocatalysts (Pt CF 3 NPs/C) are compared to commercial benchmark PtNPs/C. Pt CF 3 NPs/C exhibit a remarkable methanol tolerance without losing the MOR reactivity along with outstanding durability and chemical stability. Beyond designing single-catalyst material, operable in DMFC cathodic and anodic compartments, the results highlight a promising strategy for tuning interfacial properties.

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“…Ni can adsorb the hydroxyl group to form NiOH, which reacts with Pt−CO to remove CO intermediates. Thus, the CO resistance of the catalyst was improved [34–38] . Meanwhile, catalyst carriers have numerous functions, which included making metal nanoparticles more uniformly dispersed, providing pathways for electron conduction in catalysts, facilitating the realization of other elemental doping, and interacting with metal elements to improve catalyst performance.…”

Section: Introductionmentioning

confidence: 99%

Ni‐Pt Bimetallic Alloy Nanoparticles Dispersed Uniformly on Carbon Nanotubes for Efficient Electrooxidation Methanol

Wang,

Yan,

Xiang

et al. 2023

ChemistrySelect

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In this paper, Ni−Pt bimetallic alloy nanoparticles were loaded on carbon nanotubes to construct Ni−Pt nanoparticles/carbon nanotubes (Ni−Pt NPs/CNTs) composites as excellent catalytic materials for methanol electrooxidation reaction (MOR). X‐ray diffraction (XRD), X‐ray photoelectron spectroscopy (XPS), and special aberration corrected transmission electron microscope (STEM) were employed to investigate the morphology of the material. It was confirmed that the Ni−Pt alloy nanoparticles dispersed uniformly on the surface of carbon nanotubes. The activity and stability of Ni−Pt NPs/CNTs composites were measured by chronoamperometry (CA), linear sweep voltammetry (LSV) and cyclic voltammetry (CV). The catalytic performance was explored by adjusting the ratio of Ni to Pt. The Ni1Pt2 NPs/CNTs composite showed excellent performance for MOR. Its mass activity for MOR was 1255 mA ⋅ mg−1Pt, which was 2.76, 2.56 times as that of commercial Pt/C, Pt black catalyst, respectively. Moreover, the resistance to CO toxicity of Ni1Pt2 NPs/CNTs composite was better than commercial Pt/C and Pt black catalyst.

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Synthesis of Pt-Ni (trace)/GNs composite and its bi-functional electrocatalytic properties for MOR and ORR

Cited by 33 publications

References 59 publications

Hierarchical Pt-In Nanowires for Efficient Methanol Oxidation Electrocatalysis

Hierarchical Pt-In Nanowires for Efficient Methanol Oxidation Electrocatalysis

Chemical Surface Grafting of Pt Nanocatalysts for Reconciling Methanol Tolerance with Methanol Oxidation Activity

Ni‐Pt Bimetallic Alloy Nanoparticles Dispersed Uniformly on Carbon Nanotubes for Efficient Electrooxidation Methanol

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