In Situ Exfoliation and Pt Deposition of Antimonene for Formic Acid Oxidation via a Predominant Dehydrogenation Pathway

Zhang, Yiqiong; Qiao, Man; Huang, Yu‐Cheng; Zou, Yuqin; Liu, Zhijuan; Li, Tao; Li, Yafei; Dong, Chung‐Li; Wang, Shuangyin

doi:10.34133/2020/5487237

Cited by 11 publications

(7 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The inductive behavior can be attributed to the formation of hydroxyl species on Pt sites. Generally, this hydroxyl species had the ability to oxidize and remove the adsorbed CO intermediates on the catalyst surface to promote MOR [53,54]. It can be seen that the impedance analysis result is consistent with those of CV measurements and I f /I b value.…”

Section: Articles Science China Materialssupporting

confidence: 78%

Tailoring lattice strain in ultra-fine high-entropy alloys for active and stable methanol oxidation

et al. 2021

Self Cite

View full text Add to dashboard Cite

High-entropy alloys (HEAs) have been widely studied due to their unconventional compositions and unique physicochemical properties for various applications. Herein, for the first time, we propose a surface strain strategy to tune the electrocatalytic activity of HEAs for methanol oxidation reaction (MOR). High-resolution aberration-corrected scanning transmission electron microscopy (STEM) and elemental mapping demonstrate both uniform atomic dispersion and the formation of a face-centered cubic (FCC) crystalline structure in PtFeCoNiCu HEAs. The HEAs obtained by heat treatment at 700°C (HEA-700) exhibit 0.94% compressive strain compared with that obtained at 400°C (HEA-400). As expected, the specific activity and mass activity of HEA-700 is higher than that of HEA-400 and most of the state-of-the-art catalysts. The enhanced MOR activity can be attributed to a shorter Pt-Pt bond distance in HEA-700 resulting from compressive strain. The nonprecious metal atoms in the core could generate compressive strain and down shift d-band centers via electron transfer to surface Pt layer. This work presents a new perspective for the design of high-performance HEAs electrocatalysts.

show abstract

Section: Articles Science China Materialssupporting

confidence: 78%

Tailoring lattice strain in ultra-fine high-entropy alloys for active and stable methanol oxidation

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…They either resist CO adsorption on the Pt surface and/or facilitate oxidative removal of adsorbed CO from the Pt surface. The first approach is realised by coupling Pt with other metals such as Ni [38][39][40][41], Bi [42][43][44], Sb [45], and Rh [46] through so-called ensemble and/or electronic effects. Another approach is based on the enrichment of the surface with oxygen-containing species via the so-called bifunctional mechanism by alloying Pt, e.g., with metal oxides such as NiO x [47][48][49][50], CoOx [47], Cu 2 O [51], FeOx [52], and MnO x [53,54], which are characterised by their ability to allow the electrochemical dissociation of water at potentials more negative than that of bare Pt [55,56].…”

Section: Introductionmentioning

confidence: 99%

Pt-Coated Ni Layer Supported on Ni Foam for Enhanced Electro-Oxidation of Formic Acid

Nacys,

Simkunaitė,

Balciunaite

et al. 2023

Materials

View full text Add to dashboard Cite

A Pt-coated Ni layer supported on a Ni foam catalyst (denoted PtNi/Nifoam) was investigated for the electro-oxidation of the formic acid (FAO) in acidic media. The prepared PtNi/Nifoam catalyst was studied as a function of the formic acid (FA) concentration at bare Pt and PtNi/Nifoam catalysts. The catalytic activity of the PtNi/Nifoam catalysts, studied on the basis of the ratio of the direct and indirect current peaks (jd)/(jnd) for the FAO reaction, showed values approximately 10 times higher compared to those on bare Pt, particularly at low FA concentrations, reflecting the superiority of the former catalysts for the electro-oxidation of FA to CO2. Ni foams provide a large surface area for the FAO, while synergistic effects between Pt nanoparticles and Ni-oxy species layer on Ni foams contribute significantly to the enhanced electro-oxidation of FA via the direct pathway, making it almost equal to the indirect pathway, particularly at low FA concentrations.

show abstract

“…The onset potentials of oxidation toward formic acid on Pt/BGA‐C and Pt/GA‐C catalyst are about zero volts whereas the onset potential on Pt/NGA‐C catalyst is 0.02 V. Although the formic acid oxidation through indirect path is easier than the direct path, the catalytic activity should be enhanced at the dehydrogenation path in order to improve the overall cell efficiency 53 . In direct mechanism, the lower onset potential of intermediate product (ie, COOH and OCHO pathways) will facilitate the electrooxidation of HCOOH into CO 2 54 . Because BGA‐C supported catalyst has the high current values visible in forward scan and lower onset potential which is a better support material compared to GA‐C and NGA‐C supports.…”

Section: Resultsmentioning

confidence: 99%

Carbon black‐heteroatom‐doped graphene aerogel hybrid supported platinum nanoparticles as electrocatalysts for oxidation of methanol and formic acid

Çögenli

Yurtcan

2022

Intl J of Energy Research

View full text Add to dashboard Cite

Summary Supported catalysts are generally used for electrochemical reactions in fuel cells. Due to their superior properties in these reactions, platinum nanoparticles are preferred over carbon‐structured support materials. Commercial carbon support material such as carbon black (Vulcan XC‐72) is widely used alone for the deposition of platinum particles on the surface. But this support material when used alone is easily affected from the operating conditions of methanol and formic acid oxidation resulting from chemical reaction. Graphene aerogels (GA) are the graphene‐based materials that are important discoveries in nanotechnology, recently. These materials are being investigated as support materials in fuel cell catalysts. In this study, carbon black was used together with GA and heteroatom‐doped GA, as support materials. Three different hybrid carbon (50:50) supported Pt nanoparticles, namely, Pt/GA‐C (carbon black and GA), Pt/NGA‐C (carbon black‐ and nitrogen‐doped GA), and Pt/BGA‐C (carbon black‐ and boron‐doped GA) were synthesized by using, first, the modified Hummers method, second, hydrothermal treatment for support materials, and microwave irradiation method for Pt nanoparticles formation on support materials. The hybrid supported catalysts were characterized using scanning electron microscope, energy dispersion spectroscopy, BET, X‐ray diffractometer, transmission electron microscope, Raman, X‐ray photoelectron spectroscopy, inductively coupled plasma mass spectrometry. The catalysts analysis was studied using cyclic voltammetry, impedance, and short‐term durability. The Pt/BGA‐C catalyst showed the highest catalytic activity for both formic acid and methanol oxidation.

show abstract

In Situ Exfoliation and Pt Deposition of Antimonene for Formic Acid Oxidation via a Predominant Dehydrogenation Pathway

Cited by 11 publications

References 35 publications

Tailoring lattice strain in ultra-fine high-entropy alloys for active and stable methanol oxidation

Tailoring lattice strain in ultra-fine high-entropy alloys for active and stable methanol oxidation

Pt-Coated Ni Layer Supported on Ni Foam for Enhanced Electro-Oxidation of Formic Acid

Carbon black‐heteroatom‐doped graphene aerogel hybrid supported platinum nanoparticles as electrocatalysts for oxidation of methanol and formic acid

Contact Info

Product

Resources

About