Ag nanoparticles modified crumpled borophene supported Co3O4 catalyst showing superior oxygen evolution reaction (OER) performance

Saad, Ali; Liu, Dongqing; Wu, Yuchen; Song, Zhaoqi; Liu, Ying; Najam, Tayyaba; Zong, Kai; Tsiakaras, Panagiotis; Cai, Xingke

doi:10.1016/j.apcatb.2021.120529

Cited by 153 publications

(59 citation statements)

References 56 publications

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“…7f, g and S49). The volume-time curve for H 2 and O 2 is obtained by water drainage method at 0, 10,15,20,25,30,35,40,45, and 50 min measured at 30.0 mA. The volume-time curve for H 2 and O 2 is about 2:1, and they are close to the theoretical values, indicating the nearly 100% Faradic efficiency.…”

Section: Ws Catalytic Performancementioning

confidence: 62%

“…Electrochemical water splitting (WS) is considered as a green and convenient method for producing hydrogen (H 2 ) [1][2][3][4]. However, the practical water electrolysis is limited by the sluggish kinetics at cathode (hydrogen evolution reaction, HER) and anode (oxygen evolution reaction, OER) [5][6][7][8][9][10][11]. For industrial WS catalyst, these requirements must be met: (1) stable and high active sites at large current density [12]; (2) continuous intensive gas evolution [13,14]; (3) fast electron transfer [15,16]; (4) low-cost and accessibility [17,18].…”

Section: H O Cmentioning

confidence: 99%

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Three-Phase Heterojunction NiMo-Based Nano-Needle for Water Splitting at Industrial Alkaline Condition

et al. 2021

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Constructing heterojunction is an effective strategy to develop high-performance non-precious-metal-based catalysts for electrochemical water splitting (WS). Herein, we design and prepare an N-doped-carbon-encapsulated Ni/MoO2 nano-needle with three-phase heterojunction (Ni/MoO2@CN) for accelerating the WS under industrial alkaline condition. Density functional theory calculations reveal that the electrons are redistributed at the three-phase heterojunction interface, which optimizes the adsorption energy of H- and O-containing intermediates to obtain the best ΔGH* for hydrogen evolution reaction (HER) and decrease the ΔG value of rate-determining step for oxygen evolution reaction (OER), thus enhancing the HER/OER catalytic activity. Electrochemical results confirm that Ni/MoO2@CN exhibits good activity for HER (ƞ-10 = 33 mV, ƞ-1000 = 267 mV) and OER (ƞ10 = 250 mV, ƞ1000 = 420 mV). It shows a low potential of 1.86 V at 1000 mA cm−2 for WS in 6.0 M KOH solution at 60 °C and can steadily operate for 330 h. This good HER/OER performance can be attributed to the three-phase heterojunction with high intrinsic activity and the self-supporting nano-needle with more active sites, faster mass diffusion, and bubbles release. This work provides a unique idea for designing high efficiency catalytic materials for WS.

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Section: Ws Catalytic Performancementioning

confidence: 62%

Section: H O Cmentioning

confidence: 99%

Three-Phase Heterojunction NiMo-Based Nano-Needle for Water Splitting at Industrial Alkaline Condition

et al. 2021

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“…[17] Zhao and his co-workers fabricated Ag-doped CoSe 2 materials through a simple cation exchange method and exhibited a significant improvement in the OER activity when utilized as OER electrocatalysts. [18] Ali Saad et al [19] reported borophene decorated with Ag nanoparticles as a support, which showed greatly enhanced OER performance for Co 3 O 4 catalysts. They reported that Ag nanoparticles could increase the electrical conductivity of the support which facilitates electrons-transfer from CoIII atoms to form catalytically active CoIV sites.…”

Section: Introductionmentioning

confidence: 99%

Hollow Co‐Based Layered Double Hydroxide Decorated with Ag Nanoparticles for the Oxygen Evolution Reaction

Gan

Guo

Li³

et al. 2022

ChemElectroChem

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Developing cost-effective and efficient oxygen evolution reaction (OER) catalysts is very important for electrochemical water splitting devices. Herein, hollow Co-based layered double hydroxide (LDH) decorated with Ag nanoparticles (Ag@HÀ Co-À LDH) was constructed using ion etching of zeolitic imidazolate frameworks-67 (ZIF-67), followed by simple stirring with Ag salts. Hollow double layered structure could expose rich active centers and improve electron transfer and mass transport. Meanwhile, the introduction of Ag species greatly increases the electrical conductivity and enhances cobalt species to form highly catalytically active Co 4 + . Therefore, the as-obtained Ag@HÀ CoÀ LDH exhibits a distinguished OER activity with a low overpotential of 298 mV to provide an oxygen evolution current density of 10 mA cm À 2 , which is superior to that of CoÀ LDH and even commercial RuO 2 .

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“…The chemical composition of the material is HB, where the hydrogen/boron atomic ratio is 1/1. Previous experiments have shown that hydrogen boride sheets have a high H 2 content (8.5 wt %) [2], unique electronic properties [3,4], solid acid catalytic properties [5,6], photoinduced hydrogen release capability [7], and a unique ability to reduce metal ions to form nanocomposites [8][9][10]. In addition, theoretical models and computer simulations demonstrate that borophane is a promising candidate for applications such as anode material, alcohol gas sensors, current limiters, and photodetectors [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

“…At present, studies on the synthesis of hydrogen boride have been carried out only for a powder sample obtained from finely dispersed MgB 2 [2][3][4][5][6][7][8][9][10]. However, hydrogen boride thin films deposited on substrates would offer better opportunities for the in-depth analysis of the physical properties and investigation of possible applications of this material.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Hydrogen Boride Thin Film by Ion Exchange in MgB2

et al. 2021

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In this study, hydrogen boride films are fabricated by ion-exchange treatment on magnesium diboride (MgB2) films under ambient temperature and pressure. We prepared oriented MgB2 films on strontium titanate (SrTiO3) substrates using pulsed laser deposition (PLD). Subsequently, these films were treated with ion exchangers in acetonitrile solution. TOF-SIMS analysis evidenced that hydrogen species were introduced into the MgB2 films by using two types of ion exchangers: proton exchange resin and formic acid. According to the HAXPES analysis, negatively charged boron species were preserved in the films after the ion-exchange treatment. In addition, the FT-IR analysis suggested that B-H bonds were formed in the MgB2 films following the ion-exchange treatment. The ion-exchange treatment using formic acid was more efficient compared to the resin treatment; with respect to the amount of hydrogen species introduced into the MgB2 films. These ion-exchanged films exhibited photoinduced hydrogen release as observed in a powder sample. Based on the present study, we expect to be able to control the morphology and hydrogen content of hydrogen boride thin films by optimising the ion-exchange treatment process, which will be useful for further studies and device applications.

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Ag nanoparticles modified crumpled borophene supported Co3O4 catalyst showing superior oxygen evolution reaction (OER) performance

Cited by 153 publications

References 56 publications

Three-Phase Heterojunction NiMo-Based Nano-Needle for Water Splitting at Industrial Alkaline Condition

Three-Phase Heterojunction NiMo-Based Nano-Needle for Water Splitting at Industrial Alkaline Condition

Hollow Co‐Based Layered Double Hydroxide Decorated with Ag Nanoparticles for the Oxygen Evolution Reaction

Fabrication of Hydrogen Boride Thin Film by Ion Exchange in MgB2

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