Enhanced electrocatalytic activity of FeNi alloy quantum dot-decorated cobalt carbonate hydroxide nanosword arrays for effective overall water splitting

Zhao, Meiru; Du, Jia; Lei, Hao; Pei, Lingwei; Gong, Zhangquan; Wang, Xing; Bao, Haifeng

doi:10.1039/d1nr08035k

Cited by 16 publications

(13 citation statements)

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“…An aqueous solution of Ce(NO 3 ) 3 and NaCl was employed as the electrolyte, and the deposition was performed at 0.30 mA cm −2 for a desired duration to control the amount of Ce loading. Similarly, Zhao et al [ 97 ] used an aqueous solution of nickel acetate and iron chloride as the electrolyte to electrodeposit FeNi alloy quantum dots (QDs) on sword‐like nanoarrays of CoCH/NF. Electrodeposition was performed at 20 mA cm −2 for 200 s to obtain FeNi/CoCH/NF.…”

Section: General Synthetic Methods For Preparation Of Mtmch Electroca...mentioning

confidence: 99%

“…There are various modulation strategies for improving the OER kinetics and decreasing the overpotential of MTMCHs for alkaline OER. [ 55–57,68,72–99 ] Table 1 summarizes the different approaches undertaken to achieve excellent OER performance with the good long‐term stability of MTMCHs.…”

Section: Mtmch Electrocatalysts In Oxygen Evolution Reactionmentioning

confidence: 99%

Section: Mtmch Electrocatalysts In Oxygen Evolution Reactionmentioning

confidence: 99%

“…As a result of all these contributing factors, Cu 3 N@CoNiCHs@CF demonstrated excellent OER performance ( η 10 ≈ 155 mV) in 1.0 m KOH. In a recent study, Zhao et al [ 97 ] employed FeNi‐QD‐decorated CoCH@Ni foam nanosword arrays (Figure 10f) as an efficient OER electrocatalyst in 1.0 m KOH. The FeNi/CoCH/Ni foam exhibited a low overpotential of ≈240 mV@20 mA cm −2 and a Tafel slope (Figure 10g) of ≈44.8 mV dec −1 for OER.…”

Section: Mtmch Electrocatalysts In Oxygen Evolution Reactionmentioning

confidence: 99%

“…Figure displays a pie chart of the available reports on the electrocatalytic alkaline OER activities of transition metal carbonate hydroxides to date. [ 55–57,59,60,67–99 ] The present review commences with a general discussion of the electrochemical pathways and mechanism of OER in alkaline media. Subsequently, all the activity‐determining parameters in the OER and comprehensive studies on first‐row transition‐metal‐based multimetallic MTMCHs as OER electrocatalysts are discussed.…”

Section: Introductionmentioning

confidence: 99%

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Mixed Transition Metal Carbonate Hydroxide‐Based Nanostructured Electrocatalysts for Alkaline Oxygen Evolution: Status and Perspectives

Karmakar

Chavan

Jeong

et al. 2022

Adv Energy and Sustain Res

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To date, conventional fossil fuels have been considered the main energy source for modern civilization. [1] The nonrenewable nature and continuous depletion of fossil fuels and the increasing CO 2 emission levels necessitate the development of cost-effective renewable energy conversion/storage systems. [2][3][4][5] In this context, hydrogen, as a fuel, is considered an important alternative to many conventional energy resources owing to its several advantages, such as facile energy storage/carrier, high energy density, and zero-emission upon combustion. [6][7][8] Hydrogen has applications in heat generation, [9] refining processes in industry, [10] and provides electricity in stationary and transport/ vehicle. [11] Hydrogen can be manufactured using a variety of methods, such as hightemperature steam reforming, water electrolysis, solar water splitting-thermolysis, and biomass conversion. [12] Among these methods, steam reforming is the preferred method; it fulfills %96% of global hydrogen demand. [13,14] However, this process requires high temperatures (700-1100 °C) and fossil fuels/natural hydrocarbons, and it is accompanied by greenhouse gas (CO 2 ) emissions. [15][16][17] Among various hydrogen production technologies, water electrolysis can be considered a major contributor to the production of ultrapure hydrogen (>99.9%); moreover, water electrolysis is environmentally benign. In addition, the electrolysis of water in alkaline media is a highly cost-effective, sustainable, and industrially viable method for hydrogen production. [18] However, efficient hydrogen production through water electrolysis is limited by the high overpotential and sluggish kinetics of the anodic oxygen evolution reaction (OER) and the cathodic hydrogen evolution reaction (HER). [11] The OER involves four-electron transfer pathways under acidic and alkaline conditions. Further, OER is associated with many other energy conversion and storage processes/devices, such as solar fuel production [2] and metal-air batteries. [19] The OER is a four-electron transfer process and has a relatively higher overpotential than the HER and a complex reaction mechanism; hence, OER can be considered the rate-determining step (RDS) for hydrogen production through water electrolysis. [20] Furthermore, the OER has unusually low rate constants and high

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Section: General Synthetic Methods For Preparation Of Mtmch Electroca...mentioning

confidence: 99%

Section: Mtmch Electrocatalysts In Oxygen Evolution Reactionmentioning

confidence: 99%

Section: Mtmch Electrocatalysts In Oxygen Evolution Reactionmentioning

confidence: 99%

Section: Mtmch Electrocatalysts In Oxygen Evolution Reactionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Mixed Transition Metal Carbonate Hydroxide‐Based Nanostructured Electrocatalysts for Alkaline Oxygen Evolution: Status and Perspectives

Karmakar

Chavan

Jeong

et al. 2022

Adv Energy and Sustain Res

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Electronic‐State Modulation of Metallic Co‐Assisted Co₇Fe₃ Alloy Heterostructure for Highly Efficient and Stable Overall Water Splitting

Wang

Nie

et al. 2023

Advanced Science

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Manipulating electronic structure of alloy‐based electrocatalysts can eagerly regulate its catalytic efficiency and corrosion resistance for water splitting and fundamentally understand the catalytic mechanisms for oxygen/hydrogen evolution reactions (OER/HER). Herein, the metallic Co‐assisted Co7Fe3 alloy heterojunction (Co7Fe3/Co) embeds in a 3D honeycomb‐like graphitic carbon is purposely constructed as a bifunctional catalyst for overall water splitting. As‐marked Co7Fe3/Co‐600 displays the excellent catalytic activities in alkaline media with low overpotentials of 200 mV for OER and 68 mV for HER at 10 mA cm−2. Theoretical calculations reveal the electronic redistribution after coupling Co with Co7Fe3, which likely forms the electron‐rich state over interfaces and the electron‐delocalized state at Co7Fe3 alloy. This process changes the d‐band center position of Co7Fe3/Co and optimizes the affinity of catalyst surface to intermediates, thus promoting the intrinsic OER/HER activities. For overall water splitting, the electrolyzer only requires a cell voltage of 1.50 V to achieve 10 mA cm−2 and dramatically retains 99.1% of original activity after 100 h of continuous operation. This work proposes an insight into modulation of electronic state in alloy/metal heterojunctions and explores a new path to construct more competitive electrocatalysts for overall water splitting.

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A Review of Top‐Down Strategies for the Production of Quantum‐Sized Materials

Chen,

Zhao,

Zhou

et al. 2023

Small Science

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Nanoscience and technology have made significant achievements in the past few decades. Quantum‐sized materials, as a key component of nanomaterials, have attracted increasing interest due to their unique structures and extremely reduced sizes. Such fascinating materials have been widely applied in various fields because of their strong quantum confinement and remarkable surface/edge effects. Production methods have an important impact on the properties of quantum‐sized materials. Considering that many previous reviews have reported the synthesis of quantum‐sized materials by bottom‐up methods, this review will focus on the top‐down methods. The advantages and disadvantages of each strategy are analyzed. At the end, the perspectives and challenges toward the future development of quantum‐sized materials are discussed.

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Enhanced electrocatalytic activity of FeNi alloy quantum dot-decorated cobalt carbonate hydroxide nanosword arrays for effective overall water splitting

Abstract: Development of earth-abundant catalysts toward high-efficient overall water splitting is critical important for electrochemical hydrogen production. Here, a novel FeNi alloy quantum dots (QDs) accorded on cobalt carbonate hydroxide (CoCH)...

Cited by 16 publications

References 37 publications

Mixed Transition Metal Carbonate Hydroxide‐Based Nanostructured Electrocatalysts for Alkaline Oxygen Evolution: Status and Perspectives

Mixed Transition Metal Carbonate Hydroxide‐Based Nanostructured Electrocatalysts for Alkaline Oxygen Evolution: Status and Perspectives

Electronic‐State Modulation of Metallic Co‐Assisted Co₇Fe₃ Alloy Heterostructure for Highly Efficient and Stable Overall Water Splitting

A Review of Top‐Down Strategies for the Production of Quantum‐Sized Materials

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Enhanced electrocatalytic activity of FeNi alloy quantum dot-decorated cobalt carbonate hydroxide nanosword arrays for effective overall water splitting

Abstract: Development of earth-abundant catalysts toward high-efficient overall water splitting is critical important for electrochemical hydrogen production. Here, a novel FeNi alloy quantum dots (QDs) accorded on cobalt carbonate hydroxide (CoCH)...

Cited by 16 publications

References 37 publications

Mixed Transition Metal Carbonate Hydroxide‐Based Nanostructured Electrocatalysts for Alkaline Oxygen Evolution: Status and Perspectives

Mixed Transition Metal Carbonate Hydroxide‐Based Nanostructured Electrocatalysts for Alkaline Oxygen Evolution: Status and Perspectives

Electronic‐State Modulation of Metallic Co‐Assisted Co7Fe3 Alloy Heterostructure for Highly Efficient and Stable Overall Water Splitting

A Review of Top‐Down Strategies for the Production of Quantum‐Sized Materials

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About

Electronic‐State Modulation of Metallic Co‐Assisted Co₇Fe₃ Alloy Heterostructure for Highly Efficient and Stable Overall Water Splitting