Solution combustion synthesis of ternary Ni/WC/C composites with efficient electrocatalytic oxygen reduction performance

Chen, Pengqi; Tai, Yunxiao; Fang, Qingqing; Xu, Dang; Gao, Yufei; Cheng, Jigui

doi:10.1039/d1ra06884a

Cited by 3 publications

(1 citation statement)

References 37 publications

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“…Several recent works reported material stability and surface area improvement through the synergistic effect and charger transfer role through the heterojunction/hybrid (Saravanan et al, 2014;Lachheb et al, 2017;Chen et al, 2021;Srinivasa et al, 2021). (Dhal et al, 2015) synthesized ternary Fe 2 O 3 /ZnFe 2 O 4 / ZnO NCs materials by using hydrothermal methods for the degradation of malachite green dye.…”

Section: Introductionmentioning

confidence: 99%

Synergetic and charge transfer properties of a metal oxide heterojunction: Photocatalytic activities

Abebe

2022

Front. Catal.

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Improvement in the synthesis techniques and their optimum properties to be up-to-date is the global need for industrially scalable applications. The sol–gel solution combustion synthesis (SG-SCS) approach is an easy, time-/energy-efficient, and creates regularly ordered porous materials that have significance in the ion-/mass-transport phenomenon. Furthermore, the approach also yields a decent heterojunction once optimized via the HSAB theory. Forming a heterojunction also tunes the crucial properties of the materials, thus, boosting the photocatalytic ability through charge transfer or/and synergistic roles. From the stability investigation results, the calcination temperature of 500°C is determined to be ideal. The X-ray diffraction and high-resolution transmission electron microscopy (HRTEM) techniques confirmed the nanoscale size of the NPs and NCs. The porous nature of the materials is revealed from the scanning electron microscopy micrographs and BET analysis; consistent results are also noted from selected area electron diffraction and HRTEM. The detected stacking faults on the IFFT image of HRTEM also confirmed the porous properties of the NCs. The precise elemental composition and local heterojunction within Zn/Fe(III)/Mn(III) oxides were confirmed in the HRTEM, X-ray photoelectron spectroscopy, and energy-dispersive X-ray studies. The significant charge transfer capability of the NCs more than bare ZnO was evidenced from the electrochemical analysis. The NCs were also effective on acid orange 8 (AO8) and Congo red (CR) dye degradations.

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Section: Introductionmentioning

confidence: 99%

Synergetic and charge transfer properties of a metal oxide heterojunction: Photocatalytic activities

Abebe

2022

Front. Catal.

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Transition metal carbides coupled with nitrogen-doped carbon as efficient and stable Bi-functional catalysts for oxygen reduction reaction and hydrogen evolution reaction

Tao

2022

International Journal of Hydrogen Energy

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Microstructural, surface and electrochemical properties of electrodeposited Ni-WC nanocomposites coatings

Lemya

Hachemi

Elhachmi

2022

MGC

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In this work, we study the influences of nano-sized WC particles (diameter size of ∼50 nm), concentrations on the structure, surface morphology, mechanical and electrochemical properties of Ni-WC composite coatings electrodeposited on pretreated copper substrates. The corrosion behavior of Ni-WC composite coatings was studied by the potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) methods in two corrosion media (0.1 M HCl) and (3.5% NaCl). EDS analysis affirms that WC is the incorporated particles and nickel is the blinder metal. The incorporation of WC particles in the nickel matrix forms heterogeneous deposits that contain deep and narrow pores. XRD pattern indicates good crystal structure with (110), (111), (200) and (311) preferred growth orientations. The reinforcement of Ni matrix by nan-sized WC particles refines the grains size of the coatings. Microhardness and roughness of the deposits increase with the increase of WC concentration in the electrolyte bath. Based on the lowest corrosion density and the highest charge transfer resistance value, corrosion tests show that the samples 4 g/L and 1 g/L immersed in the corrosive media of 3.5% NaCl and 0.1 M HCl are the optimum conditions, respectively.

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Solution combustion synthesis of ternary Ni/WC/C composites with efficient electrocatalytic oxygen reduction performance

Abstract: A Ni/WC/C catalyst synthesized via a rapid combustion method showed considerable efficiency in the oxygen reduction reaction. The excellent performance is attributed to a synergistic effect arising from the ternary composite and solution combustion.

Cited by 3 publications

References 37 publications

Synergetic and charge transfer properties of a metal oxide heterojunction: Photocatalytic activities

Synergetic and charge transfer properties of a metal oxide heterojunction: Photocatalytic activities

Transition metal carbides coupled with nitrogen-doped carbon as efficient and stable Bi-functional catalysts for oxygen reduction reaction and hydrogen evolution reaction

Microstructural, surface and electrochemical properties of electrodeposited Ni-WC nanocomposites coatings

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