A facile one-step preparation of a Pd–Co bimetallic hollow nanosphere electrocatalyst for ethanol oxidation

Bai, Zhengyu; Xu, Ping; Chao, Shujun; Yan, Huiying; Cui, Qian; Niu, Lu; Yang, Lin; Qiao, Jinli

doi:10.1039/c3cy00234a

Cited by 24 publications

(16 citation statements)

References 30 publications

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“…Therefore, a proper mass ratio between Pd and Co can provide more efficient catalytic activity. What is more, the yolk-shell structure nanocatalyst Pd-M@HCS (M = Co, Ni, Cu) with bimetal nanoparticles as its core and porous carbon as its shell layer can also be applied to electrocatalysis [22,23].…”

Section: Discussionmentioning

confidence: 99%

Synthesis of Pd-M@HCS(M = Co, Ni, Cu) Bimetallic Catalysts and Their Catalytic Performance for Direct Synthesis of H2O2

et al. 2020

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Hydrogen peroxide (H2O2), as a clean and green oxidant, is widely used in many fields. The direct synthesis of H2O2 (DSHP) from H2 and O2 has attracted most research interest because it relates to a facile, environmentally friendly, and economic process. Yolk–shell Pd-M@HCS (hollow carbon sphere) (M = Co, Ni, Cu) nanocatalysts, in which the bimetal nanoparticle is the core and porous carbon works as the shell layer, are reported in this work. It was found that catalytic activities were enhanced because of the introduced M metals. Additionally, the different mass ratios of Pd to Co (mPd/mCo) were further investigated to improve the catalytic performance for the DSHP. When mPd/mCo was 4.4, the prepared Pd-Co@HCS-(4.4) catalyst, with an average Pd nanoparticle size of 7.30 nm, provided the highest H2O2 selectivity of 87% and H2O2 productivity of 1996 mmolgPd−1·h−1, which were increased by 24% and 253%, respectively, compared to Pd@HCS.

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Section: Discussionmentioning

confidence: 99%

Synthesis of Pd-M@HCS(M = Co, Ni, Cu) Bimetallic Catalysts and Their Catalytic Performance for Direct Synthesis of H2O2

et al. 2020

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“…Direct ethanol fuel cells are one of the most promising technologies because of their low toxicity, high energy, and the ease of storage and refueling of the ethanol fuels. [6][7][8][9] Au is an interesting alternative electrocatalyst. [3][4][5] However, the large-scale commercialization of direct ethanol fuel cells has been hindered by the sluggish reaction dynamics, high costs and limited supply of Pt.…”

Section: Introductionmentioning

confidence: 99%

“…A number of recent studies have therefore focused on non-Pt electrocatalysts. [6][7][8][9] Au is an interesting alternative electrocatalyst. Traditionally, Au has been considered to be chemically inert, although recent studies have shown that Au nanoparticles have a high catalytic activity.…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional Au_0.5/reduced graphene oxide/Au_0.5/reduced graphene oxide/carbon fiber electrode and its high catalytic performance toward ethanol electrooxidation in alkaline media

Wang,

Zhai

et al. 2015

J. Mater. Chem. A

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A three-dimensional Au nanoparticle/reduced graphene oxide (RGO)/carbon fiber (CF) hybrid electrode (denoted as Au 0.5 /RGO/Au 0.5 /RGO/CF) was fabricated via a layer-by-layer method. The as-formed composite was characterized by Raman spectrometry, X-ray diffraction, scanning electron microscopy and X-ray photoelectron spectrometry. Two RGO sheets and two Au nanoparticle sheets were assembled in alternate layers on the CFs. The catalytic performance of the as-prepared electrode was evaluated via cyclic voltammetry and chronopotentiometry. The as-synthesized three-dimensional Au 0.5 / RGO/Au 0.5 /RGO/CF electrode showed highly efficient electrocatalytic activity toward ethanol oxidation in alkaline medium and the Au nanoparticles were not affected by the graphene layers. The synergistic interaction between the RGO sheets and Au nanoparticles enhanced the catalytic activity of the electrode. The excellent electronic conductivity of the RGO sheets benefited electron transfer and the removal of the intermediate species by oxidation during the ethanol electrooxidation reaction, which improved the catalytic activity. As a result of the effects of these multiple factors, the Au 0.5 /RGO/Au 0.5 / RGO/CF electrode displayed a good catalytic performance. Fig. 5 (A) Cyclic voltammograms and (B) chronoamperograms of the Au 0.25 /RGO/Au 0.75 /RGO/CF, Au 0.5 /RGO/Au 0.5 /RGO/CF and Au 0.75 / RGO/Au 0.25 /RGO/CF electrodes in 1.0 M C 2 H 5 OH/1.0 M KOH solution. J. Mater. Chem. A This journal is

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“…Compared with pure Pt/C, the Raman shis showed two special peaks at 350 cm À1 and 2850 cm À1 , which belong to the chemical bond of -O-Co and -OH, respectively. 42 The XPS spectra show that the four elements Co, O, C and Pt all exist in the prepared catalysts. On the (111) facet of the Pt layer, as shown in Fig.…”

Section: Characterization Of Pt-ocoohmentioning

confidence: 93%

“…Fig. 2b illustrates that the two distinct twin peaks at 1279 cm À1 -1484 cm À1 , assigned to the in-plane bending vibration peaks of Co-OH, 42 were characteristic to the sample of Pt-OCoOH. However, no obvious peak within the non-ngerprint peak range of 1200-4000 cm À1 was observed for pure Pt catalyst.…”

Section: Characterization Of Pt-ocoohmentioning

confidence: 99%

The mechanism of Co oxyhydroxide nano-islands deposited on a Pt surface to promote the oxygen reduction reaction at the cathode of fuel cells

Yang

Guo

et al. 2020

RSC Adv.

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A facile one-step preparation of a Pd–Co bimetallic hollow nanosphere electrocatalyst for ethanol oxidation

Cited by 24 publications

References 30 publications

Synthesis of Pd-M@HCS(M = Co, Ni, Cu) Bimetallic Catalysts and Their Catalytic Performance for Direct Synthesis of H2O2

Synthesis of Pd-M@HCS(M = Co, Ni, Cu) Bimetallic Catalysts and Their Catalytic Performance for Direct Synthesis of H2O2

Three-dimensional Au_0.5/reduced graphene oxide/Au_0.5/reduced graphene oxide/carbon fiber electrode and its high catalytic performance toward ethanol electrooxidation in alkaline media

The mechanism of Co oxyhydroxide nano-islands deposited on a Pt surface to promote the oxygen reduction reaction at the cathode of fuel cells

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A facile one-step preparation of a Pd–Co bimetallic hollow nanosphere electrocatalyst for ethanol oxidation

Cited by 24 publications

References 30 publications

Synthesis of Pd-M@HCS(M = Co, Ni, Cu) Bimetallic Catalysts and Their Catalytic Performance for Direct Synthesis of H2O2

Synthesis of Pd-M@HCS(M = Co, Ni, Cu) Bimetallic Catalysts and Their Catalytic Performance for Direct Synthesis of H2O2

Three-dimensional Au0.5/reduced graphene oxide/Au0.5/reduced graphene oxide/carbon fiber electrode and its high catalytic performance toward ethanol electrooxidation in alkaline media

The mechanism of Co oxyhydroxide nano-islands deposited on a Pt surface to promote the oxygen reduction reaction at the cathode of fuel cells

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Three-dimensional Au_0.5/reduced graphene oxide/Au_0.5/reduced graphene oxide/carbon fiber electrode and its high catalytic performance toward ethanol electrooxidation in alkaline media