1-Naphthol induced Pt3Ag nanocorals as bifunctional cathode and anode catalysts of direct formic acid fuel cells

Jiang, Xian; Liu, Yang; Wang, Jiaxin; Wang, Yufei; Xiong, Yuexin; Liu, Qun; Li, Naixu; Zhou, Jiancheng; Fu, Gengtao; Sun, Dongmei; Tang, Yawen

doi:10.1007/s12274-018-2218-2

Cited by 45 publications

(33 citation statements)

References 68 publications

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“…While the ECSA of the largest PdAgPt-THO was only 211.48 cm 2 mg −1 , around half of that of commercial Pt (437.15 cm 2 mg −1 ), the value for PdAgPt-CSC and PdAgPt-CSHC reached 579.89 cm 2 mg −1 and 538.63 cm 2 mg −1 , indicating the superiority of CSMNCS. To investigate the electrocatalytic properties of PdAgPt HMNCs, the metal mass-normalized CV curves toward FAO are given in Figure 10 a, and part of the ECSA-normalized CV curves are shown in Figure 10 c. There were generally two apparent peaks during the forward scan, which could refer to the direct oxidation pathway (FAO pathway a) and the indirect oxidation pathway (FAO pathway b), respectively [ 13 , 14 , 19 , 39 , 56 ]. Therefore, the current ratio between peak I a and peak I b is often employed to assess the dominant FAO pathway [ 57 , 58 , 59 ].…”

Section: Resultsmentioning

confidence: 99%

“…One possible explanation is that the deformation of hollow nanostructures took place after the dissolution of Ag in the heterogeneous shell, as Ag resisted the dissolution of Pd/Pt. Moreover, Pt alloyed with Ag has been proved to exhibit higher tolerance to CO poisoning, which increases the CO resistance and thus durability of nanocatalysts [ 14 , 61 ]. After the dissolution of Ag, the electrocatalytic performance decay of PdAgPt samples was inevitable.…”

Section: Resultsmentioning

confidence: 99%

“…Precisely controlling the compositions, structures and morphologies of HMNCs can directly impact their functionalities [ 8 , 9 ]. A body of research demonstrates that electrocatalytic reactions, such as formic acid oxidation (FAO), have reflected the structural characteristics of nanomaterials, especially nanostructures based on Pt and Pd [ 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 ]. Both of the two noble metals are universal components of electrocatalysts toward FAO.…”

Section: Introductionmentioning

confidence: 99%

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PdAgPt Corner-Satellite Nanocrystals in Well-Controlled Morphologies and the Structure-Related Electrocatalytic Properties

Qian

Guo

et al. 2021

Nanomaterials

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The functions of heterogeneous metallic nanocrystals (HMNCs) can be undoubtedly tuned by controlling their morphologies and compositions. As a less-studied kind of HMNCs, corner-satellite multi-metallic nanocrystals (CSMNCs) have great research value in structure-related electrocatalytic performance. In this work, PdAgPt corner-satellite nanocrystals with well-controlled morphologies and compositions have been developed by temperature regulation of a seed-mediated growth process. Through the seed-mediated growth, the morphology of PdAgPt products evolves from Pd@Ag cubes to PdAgPt corner-satellite cubes, and eventually to truncated hollow octahedra, as a result of the expansion of {111} facets in AgPt satellites. The growth of AgPt satellites exclusively on the corners of central cubes is realized with the joint help of Ag shell and moderate bromide, and hollow structures form only at higher reaction temperatures on account of galvanic displacement promoted by the Pd core. In view of the different performances of Pd and Pt toward formic acid oxidation (FAO), this structure-sensitive reaction is chosen to measure electrocatalytic properties of PdAgPt HMNCs. It is proven that PdAgPt CSMNCs display greatly improved activity toward FAO in direct oxidation pathway. In addition, with the help of AgPt heterogeneous shells, all PdAgPt HMNCs exhibit better durability than Pd cubes and commercial Pt.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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PdAgPt Corner-Satellite Nanocrystals in Well-Controlled Morphologies and the Structure-Related Electrocatalytic Properties

Qian

Guo

et al. 2021

Nanomaterials

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“…[ 20,21 ] As a result, the morphology‐control synthesis of noble‐metal nanocrystals has become a very fascinating research topic in the past decade. [ 22–33 ] According to the surface atoms coordination degree, the face‐centered cubic ( fcc ) noble metal nanocrystals can be classified into two categories: low‐index and high‐index facets. [ 34–37 ] The shape of single‐crystalline polyhedra enclosed by various facets is generally illustrated by a stereographic triangle ( Figure a).…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in Amino‐Based Molecules Assisted Control of Noble‐Metal Electrocatalysts

et al. 2021

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Morphology‐control synthesis is an effective means to tailor surface structure of noble‐metal nanocrystals, which offers a sensitive knob for tuning their electrocatalytic properties. The functional molecules are often indispensable in the morphology‐control synthesis through preferential adsorption on specific crystal facets, or controlling certain crystal growth directions. In this review, the recent progress in morphology‐control synthesis of noble‐metal nanocrystals assisted by amino‐based functional molecules for electrocatalytic applications are focused on. Although a mass of noble‐metal nanocrystals with different morphologies have been reported, few review studies have been published related to amino‐based molecules assisted control strategy. A full understanding for the key roles of amino‐based molecules in the morphology‐control synthesis is still necessary. As a result, the explicit roles and mechanisms of various types of amino‐based molecules, including amino‐based small molecules and amino‐based polymers, in morphology‐control of noble‐metal nanocrystals are summarized and discussed in detail. Also presented in this progress are unique electrocatalytic properties of various shaped noble‐metal nanocrystals. Particularly, the optimization of electrocatalytic selectivity induced by specific amino‐based functional molecules (e.g., polyallylamine and polyethyleneimine) is highlighted. At the end, some critical prospects, and challenges in terms of amino‐based molecules‐controlled synthesis and electrocatalytic applications are proposed.

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“…Aforementioned issues have been addressed by multidirectional efforts. More specically, electronic properties of Ptbased NCs have been modied via introducing foreign atoms to generate multi-element nano-architectures including Pt-M alloys [11][12][13][14][15] (where M denotes foreign metals e.g. Pd, Pb, Ru, Sn, Ni etc.…”

Section: Introductionmentioning

confidence: 99%

Promoting formic acid oxidation performance of Pd nanoparticles via Pt and Ru atom mediated surface engineering

et al. 2020

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1-Naphthol induced Pt3Ag nanocorals as bifunctional cathode and anode catalysts of direct formic acid fuel cells

Cited by 45 publications

References 68 publications

PdAgPt Corner-Satellite Nanocrystals in Well-Controlled Morphologies and the Structure-Related Electrocatalytic Properties

PdAgPt Corner-Satellite Nanocrystals in Well-Controlled Morphologies and the Structure-Related Electrocatalytic Properties

Recent Advances in Amino‐Based Molecules Assisted Control of Noble‐Metal Electrocatalysts

Promoting formic acid oxidation performance of Pd nanoparticles via Pt and Ru atom mediated surface engineering

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