Surface Sulfurization of NiCo-Layered Double Hydroxide Nanosheets Enable Superior and Durable Oxygen Evolution Electrocatalysis

Xiang, Kun; Guo, Jia; Xu, Jia; Qu, Tingting; Zhang, Yu; Chen, Shanyong; Hao, Panpan; Li, Muhong; Xie, Mingjiang; Ding, Weiping

doi:10.1021/acsaem.8b00723

Cited by 86 publications

(45 citation statements)

References 61 publications

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“…As shown in Figure S7a of the Supporting Information, the potential of the as‐obtained electrode only increases by 7 mV during 20 h operation, indicating promising stability. The improved antierosion ability of metal hydroxysulfide layer in alkaline electrolyte delivers the remarkable durability . It is well‐accepted that the appearance of anodic oxidation peak of cyclic voltammetry (CV) curves in the negative sweep corresponds to the adsorbed CO molecules which are formed during the direct methanol oxidation.…”

Section: Resultsmentioning

confidence: 99%

“…One method is to search for efficient electrocatalysts to promote the OER reaction. Although a series of ingenious materials have been constructed to accelerate anodic oxidation, exorbitant overpotentials are still required to achieve the desired current density (≥10 mA cm −2 ) . Furthermore, the product of the anode is valueless O 2 , which results in a waste of electrical energy.…”

Section: Introductionmentioning

confidence: 99%

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Boosting H₂ Generation Coupled with Selective Oxidation of Methanol into Value‐Added Chemical over Cobalt Hydroxide@Hydroxysulfide Nanosheets Electrocatalysts

Xiang

Deng

et al. 2020

Adv Funct Materials

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The sluggish kinetics of oxygen evolution reaction (OER) is the main bottleneck for the electrocatalytic water splitting to produce hydrogen (H2), and the by‐product is worthless O2. Therefore, designing a thermodynamically favorable oxidation reaction to replace OER and coupling with value‐added product generation on the anode is of significance for boosting H2 generation under low electrolysis voltage. Herein, cobalt hydroxide@hydroxysulfide nanosheets on carbon paper (Co(OH)2@HOS/CP) are synthesized as bifunctional electrocatalysts to facilitate H2 production and convert methanol to valuable formate simultaneously. Benefiting from the influences/changes on the composition, surface properties, electronic structure, and chemistry of Co(OH)2, the as‐obtained electrodes exhibit very high selectivity for methanol to value‐added formate oxidation (MFO) and boost electrocatalytic performance with low overpotential of 155 mV for MFO and 148 mV for hydrogen evolution reaction at a current density of 10 mA cm−2. Furthermore, the integrated two‐electrode electrolyzer drives 10 mA cm−2 at a cell voltage of 1.497 V with united 100% Faradaic efficiency for anodic and cathodic reaction and continuous 20 h of operation without obvious decay. The electrocatalytic hydrogen production with the assistance of alternative oxidation by the robust electrocatalyst can be further used to realize the upgrading of other organic molecules with less energy consumption.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Boosting H₂ Generation Coupled with Selective Oxidation of Methanol into Value‐Added Chemical over Cobalt Hydroxide@Hydroxysulfide Nanosheets Electrocatalysts

Xiang

Deng

et al. 2020

Adv Funct Materials

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221

145

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“…In addition, the easy fabrication and low cost of the electrocatalysts are also significant for future practical applications in green and sustainable energy systems. [ 18 ]…”

Section: D Mofs For Oermentioning

confidence: 99%

Two‐Dimensional Metal–Organic Frameworks‐Based Electrocatalysts for Oxygen Evolution and Oxygen Reduction Reactions

Zhang

et al. 2020

Adv Energy and Sustain Res

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Due to unique intrinsic properties and flexible structure modulations, 2D metal–organic frameworks (MOFs)‐based materials have become the most promising candidates in the electrocatalysts of energy‐conversion systems such as oxygen evolution reaction (OER) and oxygen reduction reaction (ORR). Herein, the background of fundamental 2D MOFs is first introduced and 2D MOF‐based electrocatalysts are classified based on OER and ORR. Meanwhile, the recent advances in the 2D MOF‐based OER and ORR electrocatalysts are emphasized and discussed including the subtle synthesis strategy, novel structures, unique morphologies, superior electrocatalytic performances, and the underlying reaction mechanism. Finally, the challenges and future perspectives for the developments and research of 2D MOFs‐based OER and ORR electrocatalysts are proposed.

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“…Generally, their OER electrocatalytic activity can be efficiently optimized by electronic engineering, including cation regulation (Co 3+ , Ni 2+ , Fe 3+ , Mn 4+ , Mo 6+ , etc.) and anion regulation (S 2− , P 3− , N 3− , S 2− /OH − , etc. ), to alter the adsorption behavior and intrinsic activity.…”

mentioning

confidence: 99%

A Nanosized CoNi Hydroxide@Hydroxysulfide Core–Shell Heterostructure for Enhanced Oxygen Evolution

et al. 2018

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date, precious metal oxides, such as IrO 2 and RuO 2 , still hold the benchmarking activity for electrocatalytic OER, [5,6] but the practical application is greatly inhibited by their high cost, low abundance, and insufficient stability. Therefore, it is highly desirable to develop greatly effective and robust OER catalysts based on earth-abundant elements. [7] Emerging as a versatile family of outstanding alternatives, transition metal compounds have recently drawn particular attention due to their high-performance, cost-efficient, structure-tunable, and environmentbenign features. Generally, their OER electrocatalytic activity can be efficiently optimized by electronic engineering, including cation regulation (Co 3+ , [8] Ni 2+ , [9,10] Fe 3+ , [11] Mn 4+ , [12] Mo 6+ , [13] etc.) and anion regulation (S 2− , [14] P 3− , [15] N 3− , [16] S 2− /OH − , [17][18][19] etc.), to alter the adsorption behavior and intrinsic activity. Besides, interface engineering with favorable nanostructures (nanosized hybrid, [9,20] core-shell, [6,21,22] freestanding, [23] etc.) is also of great benefit to the electrocatalysis performance by improving the conductivity, facilitating the charge transfer, and generating strong couple effects.Specifically, the recent attention on core-shell heterostructures invokes emerging feasibilities to thoroughly demonstrate the full potential of transition metal compounds in OER electrocatalysis. By coupling two components with different compositions and crystallinities, the constructed core-shell heterostructure is expected to achieve synergistic effects with electronic and interface engineering simultaneously, such as CoO x /CoP, [24] MoS 2 /Ni 3 S 2 , [25] Ni 2 P/NiO x , [26] NiPS 3 @NiOOH, [27] CoFe 2 O 4 @CoFeBi, [28] and so on. The heterogeneous shell and interface are able to modulate the electronic structure, [27] endow highly active surface, [25] decrease interfacial contact resistance, [29] and boost charge transfer, [30] thereby leading to greatly enhanced electrocatalytic performance. It is obvious that the features of the shell, including composition, thickness, porosity, and crystallinity, will play a vital role in regulating the resultant reactivity. Nevertheless, these core-shell heterostructures are mainly fabricated under harsh conditions or uncontrollably formed in situ during electrocatalysis, [31] which lack capability to precisely control their characters. Therefore, smart design and versatile techniques are urgently required for the controllable construction of advanced core-shell heterostructures, A cost-effective and highly efficient oxygen evolution reaction (OER) electrocatalyst will be significant for the future energy scenario. The emergence of the core-shell heterostructure has invoked new feasibilities to inspire the full potential of non-precious-metal candidates. The shells always have a large thickness, affording robust mechanical properties under harsh reaction conditions, which limits the full exposure of active sites with highly intrinsic reactivity and extri...

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Surface Sulfurization of NiCo-Layered Double Hydroxide Nanosheets Enable Superior and Durable Oxygen Evolution Electrocatalysis

Cited by 86 publications

References 61 publications

Boosting H₂ Generation Coupled with Selective Oxidation of Methanol into Value‐Added Chemical over Cobalt Hydroxide@Hydroxysulfide Nanosheets Electrocatalysts

Boosting H₂ Generation Coupled with Selective Oxidation of Methanol into Value‐Added Chemical over Cobalt Hydroxide@Hydroxysulfide Nanosheets Electrocatalysts

Two‐Dimensional Metal–Organic Frameworks‐Based Electrocatalysts for Oxygen Evolution and Oxygen Reduction Reactions

A Nanosized CoNi Hydroxide@Hydroxysulfide Core–Shell Heterostructure for Enhanced Oxygen Evolution

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Surface Sulfurization of NiCo-Layered Double Hydroxide Nanosheets Enable Superior and Durable Oxygen Evolution Electrocatalysis

Cited by 86 publications

References 61 publications

Boosting H2 Generation Coupled with Selective Oxidation of Methanol into Value‐Added Chemical over Cobalt Hydroxide@Hydroxysulfide Nanosheets Electrocatalysts

Boosting H2 Generation Coupled with Selective Oxidation of Methanol into Value‐Added Chemical over Cobalt Hydroxide@Hydroxysulfide Nanosheets Electrocatalysts

Two‐Dimensional Metal–Organic Frameworks‐Based Electrocatalysts for Oxygen Evolution and Oxygen Reduction Reactions

A Nanosized CoNi Hydroxide@Hydroxysulfide Core–Shell Heterostructure for Enhanced Oxygen Evolution

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Boosting H₂ Generation Coupled with Selective Oxidation of Methanol into Value‐Added Chemical over Cobalt Hydroxide@Hydroxysulfide Nanosheets Electrocatalysts

Boosting H₂ Generation Coupled with Selective Oxidation of Methanol into Value‐Added Chemical over Cobalt Hydroxide@Hydroxysulfide Nanosheets Electrocatalysts