Cu Modified Pt Nanoflowers with Preferential (100) Surfaces for Selective Electroreduction of Nitrate

Chen, Ting; Li, Yuxuan; Li, Luyan; Zhao, Yanjie; Shi, Shaobo; Jiang, Rongyan; Ma, Houyi

doi:10.3390/catal9060536

Cited by 18 publications

(8 citation statements)

References 38 publications

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“…This indicates that Cu atoms enhance electrocatalytic NO 3 RR activity. The enhanced NO 3 RR activities by introducing Cu into Co is well-agreed with literatures, in which Cu acts as a promoter to improve initial reduction pathway of NO 3 – to NO 2 – …”

Section: Results and Discussionsupporting

confidence: 89%

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Cobalt–Copper Nanoparticles on Three-Dimensional Substrate for Efficient Ammonia Synthesis via Electrocatalytic Nitrate Reduction

Jeon

Chen

et al. 2022

J. Phys. Chem. C

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Ammonia (NH 3 ) is a valuable chemical for fertilizer production and for use as an effective hydrogen carrier. Electrocatalytic nitrate reduction has recently received great attention as an alternative for NH 3 synthesis due to its kinetically favorable reaction. However, this promising strategy suffers from low Faradaic efficiency (FE) at large current density (>100 mA cm −2 ) and low nitrate concentrations because of the competing hydrogen evolution reaction. Herein, we report a catalyst consisting of earth-abundant cobalt−copper (Co 1−x Cu x ) nanoparticles supported on a three-dimensional substrate for efficient and selective NH 3 synthesis via electrocatalytic nitrate reduction. Typically, the optimized Co 0.5 Cu 0.5 catalyst performs at a high NH 3 Faradaic efficiency (FE) of over 95% at −0.03 V with NH 3 partial current density of ∼176 mA cm −2 at 50 mM nitrate, which is 7.3-and 1.7-fold higher than that of pure Co and Cu counterparts. Importantly, replacing Co with Cu enables the tuning of onset potential on Co catalyst maintaining high selectivity toward NH 3 . A stability test over 12 cycles confirmed the longterm operation of this catalyst. This work offers a facile strategy for tuning the catalyst's elemental composition to attain a desired electrocatalytic activity.

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Section: Results and Discussionsupporting

confidence: 89%

“…This indicates that introducing Cu atoms enhances the initial NO 3 RR step (NO 3 – + H 2 O + 2e – → NO 2 – + 2OH – ). Because the NO 2 – formation is also considered as a rate-limiting step in NO 3 RR to NH 3 (or N 2 ), replacing Co with Cu could reduce the NO 3 RR overpotential.…”

Section: Results and Discussionmentioning

confidence: 99%

Cobalt–Copper Nanoparticles on Three-Dimensional Substrate for Efficient Ammonia Synthesis via Electrocatalytic Nitrate Reduction

Jeon

Chen

et al. 2022

J. Phys. Chem. C

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“…Chen et al prepared Cu-modified Pt nanoflowers with preferential (100) surfaces by potentiostatic deposition on C cloth (Cu/Pt NFs/CC) for selective nitrate reduction. 151 The obtained Cu/Pt NFs/CC with 8.7% Cu coverage exhibited a nitrate removal of 77.5% and N 2 selectivity of 72.9%. Additionally, Mumtarin et al recently reported the applicability of an oxide deficit (OD) Pt-Cu catalyst as a nitrate sensor by electrodeposition method.…”

Section: Screening Of Nitrate Reduction Electrocatalysts In Aqueous S...mentioning

confidence: 88%

Electrocatalytic reduction of nitrate – a step towards a sustainable nitrogen cycle

et al. 2022

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“…In the implementation of the construction of cathode, porous substrates, such as Ni foam, [85,87,[135][136][137][138] Cu foam, [31,139] and carbon fiber products [140,141] can generate high surface area for the hosting of active sites. Moreover, the tunable porosity in these substrates strongly influences both the process performance and product distribution.…”

Section: Dimensional Stability Of Cathodementioning

confidence: 99%

Restoring the Nitrogen Cycle by Electrochemical Reduction of Nitrate: Progress and Prospects

et al. 2020

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The increasing amount of anthropogenic nitrogen has resulted in alarming levels of nitrate in bodies of water and caused a cascade of damage to the environment and human health. Electrochemical nitrate reduction is an efficient strategy ancillary to biological nitrogen cycle management, which utilizes electrons as green reductants and rebalances the N 2 cycle. In this review, the fundamental principles and implementation of electrochemical nitrate reduction are described to lay the foundation for the eventual large-scale application in the remediation of nitrate-laden wastewaters. Factors that influence the activity and selectivity of electrochemical nitrate reduction are also discussed. Moreover, electrolytic cell design and construction are discussed via a rational choice of critical components and assembly. Finally, a roadmap for the development of highly selective nitrate reduction catalysts is proposed. This review attempts to provide a practical strategy for electrochemical nitrogen cycle management and aims to stimulate future research for final implementation.

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Cu Modified Pt Nanoflowers with Preferential (100) Surfaces for Selective Electroreduction of Nitrate

Cited by 18 publications

References 38 publications

Cobalt–Copper Nanoparticles on Three-Dimensional Substrate for Efficient Ammonia Synthesis via Electrocatalytic Nitrate Reduction

Cobalt–Copper Nanoparticles on Three-Dimensional Substrate for Efficient Ammonia Synthesis via Electrocatalytic Nitrate Reduction

Electrocatalytic reduction of nitrate – a step towards a sustainable nitrogen cycle

Restoring the Nitrogen Cycle by Electrochemical Reduction of Nitrate: Progress and Prospects

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