Non-precious Co3O4-TiO2/Ti cathode based electrocatalytic nitrate reduction: Preparation, performance and mechanism

Gao, Jianan; Jiang, Bo; Ni, Congcong; Qi, Yuanfeng; Zhang, Y. Q.; Oturan, Nihal; Oturan, Mehmet A.

doi:10.1016/j.apcatb.2019.05.016

Cited by 299 publications

(141 citation statements)

References 48 publications

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“…During the electrochemical reduction process of NO 3 − in neutral solution, as illustrated by equations (2) and (3), the surface‐adsorbed hydrogen atom (H (ads) ) generated from water molecule (H 2 O) can be captured by the fabricated catalyst . Two H (ads) atoms can produce a H 2 molecule (equation (3)) via the Tafel and/or Heyrovsky reaction processes, thus facilitating the NO 3 − reduction due to a strong reduction atmosphere provided by H (ads) and H 2 . Then, the subsequent reduction processes can be achieved by means of equations (4)–(9), so nitrate will finally convert to NH 4 + by the stepwise atomic H (ads) addition .…”

Section: Resultsmentioning

confidence: 99%

Fabrication of Porous Configurated Ni₂P/Ni Foam Catalyst and its Boosted Properties for pH‐universal Hydrogen Evolution Reaction and Efficient Nitrate Reduction

et al. 2020

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Nickel phosphide (Ni 2 P) has been widely explored toward hydrogen evolution reaction (HER) for desirable durability and high performance. Tuning the electronic structures and morphologies of Ni 2 P plays a pivotal role in the improvement of HER performance. In this work, three Ni 2 P catalysts were fabricated by different strategies and their HER properties were compared. It was found that the bicontinuous porous structured Ni 2 P on Ni foam (Ni 2 P /NFÀ EHP) prepared using coupled electroless nickel-phosphorus (NiÀ P) plating, hydrothermal synthesis and low temperature phosphorization techniques, exhibits the best catalytic activity and a wide pH adaptability. The overpotential at 10 mA cm À 2 and Tafel slope are 78 mV and 33 mV dec À 1 in 0.5 M H 2 SO 4 , those in 1 M PBS are 125 mV and 93 mV dec À 1 , and 101 mV and 76 mV dec À 1 in 1 M KOH. Additionally, the Ni 2 P/NFÀ EHP-catalyzed HER process is also applicable for nitrate reduction with a remarkable removal efficiency of 92.6 %. This catalyst also exhibits a desirable durability both in HER and nitrate reduction. This work offers an efficient strategy to exploit compatible pH-universal HER catalysts, explores the engineering application of HER process in nitrate reduction.

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Section: Resultsmentioning

confidence: 99%

Fabrication of Porous Configurated Ni₂P/Ni Foam Catalyst and its Boosted Properties for pH‐universal Hydrogen Evolution Reaction and Efficient Nitrate Reduction

et al. 2020

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“…Zhang et al also attained a nearly 100% N 2 selectivity on the Co 3 O 4 -TiO 2 /Ti cathode. [86] This material's high selectivity is induced by hydrochloride generated on the anode, which facilitates the formation of N 2 in solution. [87] The doping of P could lead to the enhancements of H* adsorption in Co 3+ , suppressing the H 2 evolution that is counterproductive to N 2 formation.…”

Section: Catalyst Materialsmentioning

confidence: 99%

“…With the presence of hydroxidochlorine, the conversion of ammonium into N 2 is possible (Reaction (43)). By pairing electrochlorination with electrochemical nitrate reduction, high selectivity toward N 2 evolution has been reported in the electrochemical reduction of nitrate [ 86 ]

\begin{matrix} {NH}_{3} + 6 {OH}^{-} \to N_{2} + 3 H_{2} O + 6 e^{-} \end{matrix}

\begin{matrix} 2 {NH}_{4}^{+} + 3 HClO \to N_{2} + 3 H_{2} O + 3 {Cl}^{-} + 5 H^{+} \end{matrix}

…”

Section: Electrolytic Cell Set Up For Electrochemical Nitrate Reductionmentioning

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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“…Nanozymes vary in structure and composition, and include metal oxides, [37][38][39][40][41][42][43][44][45][46][47][48][49][50][51][52] metals, 17,[53][54][55][56][57][58][59][60][61][62][63][64][65][66][67][68][69][70][71] and carbon-based nanomaterials. [72][73][74][75][76][77][78] However, most of the catalytic reactions mediated by nanozymes 46 employ the following four kinds of enzymic reactions: oxidase (OXD), peroxidase (POD), catalase (CAT) and superoxide dismutase (SOD) (Table 1).…”

Section: Classification and Catalytic Mechanisms Of Nanozymementioning

confidence: 99%

Applications of nanozymes in the environment

Meng

Pan

et al. 2020

Environ. Sci.: Nano

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Non-precious Co3O4-TiO2/Ti cathode based electrocatalytic nitrate reduction: Preparation, performance and mechanism

Cited by 299 publications

References 48 publications

Fabrication of Porous Configurated Ni₂P/Ni Foam Catalyst and its Boosted Properties for pH‐universal Hydrogen Evolution Reaction and Efficient Nitrate Reduction

Fabrication of Porous Configurated Ni₂P/Ni Foam Catalyst and its Boosted Properties for pH‐universal Hydrogen Evolution Reaction and Efficient Nitrate Reduction

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

Applications of nanozymes in the environment

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Non-precious Co3O4-TiO2/Ti cathode based electrocatalytic nitrate reduction: Preparation, performance and mechanism

Cited by 299 publications

References 48 publications

Fabrication of Porous Configurated Ni2P/Ni Foam Catalyst and its Boosted Properties for pH‐universal Hydrogen Evolution Reaction and Efficient Nitrate Reduction

Fabrication of Porous Configurated Ni2P/Ni Foam Catalyst and its Boosted Properties for pH‐universal Hydrogen Evolution Reaction and Efficient Nitrate Reduction

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

Applications of nanozymes in the environment

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Resources

About

Fabrication of Porous Configurated Ni₂P/Ni Foam Catalyst and its Boosted Properties for pH‐universal Hydrogen Evolution Reaction and Efficient Nitrate Reduction

Fabrication of Porous Configurated Ni₂P/Ni Foam Catalyst and its Boosted Properties for pH‐universal Hydrogen Evolution Reaction and Efficient Nitrate Reduction