Multiphase nanosheet-nanowire cerium oxide and nickel-cobalt phosphide for highly-efficient electrocatalytic overall water splitting

Wen, Shuting; Huang, Jun; Li, Tongtong; Chen, Wei; Chen, Guangliang; Zhang, Qing; Zhang, Xianhui; Qian, Qinyu; Ostrikov, Kostya

doi:10.1016/j.apcatb.2022.121678

Cited by 84 publications

(29 citation statements)

References 77 publications

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Section: Mechanism Of Electrocatalytic Nramentioning

confidence: 99%

“…The mechanism of electrocatalytic nitrate reduction can be demonstrated by the results of the in situ electrochemical characterization and the DFT calculation. These methods are widely used in the study of the mechanism of most catalytic reactions including carbon dioxide reduction, 46 electrocatalytic water splitting, 47 and electrocatalytic N 2 fixation. 48 For the electrocatalytic nitrate reduction process of ammonia synthesis, the nitrogen in the ammonia must come from the nitrate; otherwise, the reaction is meaningless.…”

Section: ■ Introductionmentioning

confidence: 99%

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Recent Advances in Electrocatalytic Nitrate Reduction to Ammonia: Mechanism Insight and Catalyst Design

Cao

Yuan

Meng

et al. 2023

ACS Sustainable Chem. Eng.

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Excessive discharge of nitrate pollutants has caused an imbalance in the nitrogen cycle, which has threatened human health and ecosystems. Clean electrocatalytic nitrate reduction technology can convert nitrate into high value-added ammonia to control water pollution, truly realizing “turning waste into treasure”. This review highlights the latest mechanisms proposed by combining in situ characterization and discusses the various intermediates produced during the reaction process and the key steps that determine the reaction rate. Meanwhile, four common catalyst synthesis strategies are systematically summarized. These strategies have exhibited preeminent results in terms of conductivity and active sites and inhibition of side effects. Finally, the challenges and difficulty of electrocatalytic nitrate reduction into ammonia (NRA) in the process of development and the main development direction in the future are discussed. The engineering strategies for increasing the electrocatalytic stability and performance are also discussed. This review aims to provide guidance for efficient electrocatalytic nitrate conversion and promotes the advancement of sustainable nitrogen chemistry.

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Section: Mechanism Of Electrocatalytic Nramentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Recent Advances in Electrocatalytic Nitrate Reduction to Ammonia: Mechanism Insight and Catalyst Design

Cao

Yuan

Meng

et al. 2023

ACS Sustainable Chem. Eng.

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“…Besides, the current density at 1.65 V is the highest (54 mA cm À 2 ) for Co 3 NÀ Mo 0.2 /NF j j 2 @FeOOH sample at 1.5 V. f) OER performance comparison between Co 3 N@FeOOH/NF and newly developed catalyst. [42][43][44][45][46][47][48][49] ChemSusChem…”

Section: Chemsuschemmentioning

confidence: 99%

“…Figure 5. a) IR-corrected OER curves, b) Tafel plots, c) comparison diagram of overpotential at 50 mA cm À 2 and current density at 1.5 V, d) complex-plane plots for Co 3 N/NF, Co 3 NÀ Mo 0.2 /NF, Co 3 N@FeOOH/NF, and Co 3 NÀ Mo 0.2 @FeOOH/NF samples. e) Chronoamperometric response of Co 3 NÀ Mo 0.2 @FeOOH sample at 1.5 V. f) OER performance comparison between Co 3 N@FeOOH/NF and newly developed catalyst [42][43][44][45][46][47][48][49]. …”

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confidence: 99%

Rational Design of Molybdenum‐Doped Cobalt Nitride Nanowire Arrays for Robust Overall Water Splitting

et al. 2023

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Rational design of efficient electrocatalysts is highly imperative but still a challenge for overall water splitting. Herein, we construct self-supported Co 3 N nanowire arrays with different Mo doping contents by hydrothermal and nitridation processes that serve as robust electrocatalysts for overall water splitting. The optimal Co 3 NÀ Mo 0.2 /Ni foam (NF) electrode delivers a low overpotential of 97 mV at a current density of 50 mA cm À 2 as well as a highly stable hydrogen evolution reaction (HER). Density functional theory (DFT) calculations prove that Mo doping can effectively modulate the electronic structure and surface adsorption energies of H 2 O and hydrogen intermediates on Co 3 N, leading to improved reaction kinetics with high catalytic activity. Further modification with FeOOH species on the surface of Co 3 NÀ Mo 0.2 /NF improves the oxygen evolution reaction (OER) performance benefiting from the synergistic effect of dual CoÀ Fe catalytic centers. As a result, the Co 3 NÀ Mo 0.2 @FeOOH/NF catalysts display outstanding OER catalytic performance with a low overpotential of 250 mV at 50 1 mA cm À 2 .The constructed Co 3 NÀ Mo 0.2 /NF j j Co 3 NÀ Mo 0.2 @FeOOH/NF water electrolyzer exhibits a small voltage of 1.48 V to achieve a high current density of 50 mA cm À 2 at 80 °C, which is superior to most of the reported electrocatalysts. This work provides a new approach to developing robust electrode materials for electrocatalytic water splitting.

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“…So, replacing these precious materials with transition metals like Ni, Co, Cu, and Fe, which are abundant on earth for HER and OER, is essential. Transition metal hydroxides, oxides, phosphides, sulfides, and selenides are better electrocatalysts studied to improve activity and durability for hydrogen energy production. − …”

Section: Introductionmentioning

confidence: 99%

Fe-Doped NiCo₂Se₄ Nanorod Arrays as Electrocatalysts for Overall Electrochemical Water Splitting

Rathore

Ghosh

Chowdhury

et al. 2023

ACS Appl. Nano Mater.

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The development of efficient, affordable, and earth-abundant bifunctional electrocatalysts is vital for the water-splitting reaction. In this article, we have fabricated NiCo 2 Se 4 and Fe-doped NiCo 2 Se 4 through a simple hydrothermal route on the surface of carbon cloth with nanorod morphology. The developed electrocatalyst was thoroughly investigated by various techniques like PXRD, XPS, FESEM, ICP-AES, and TEM analysis. The optimized Fe 0.2 NiCo 1.8 Se 4 has worked finest for hydrogen and oxygen evolution in an alkaline medium; it entails a potential of 148 mV and 1.656 V vs RHE to obtain 50 and 100 mA/cm 2 current densities for HER and OER, respectively. The Tafel slope values for HER and OER are 85.7 and 56.3 mV/dec, respectively. This catalyst is stable under an alkaline medium for 48 h. The best HER and OER activity recommends the catalyst as a bifunctional in an alkaline medium, and the developed cell consisting of a doped sample requires 1.51 V to generate a 10 mA/cm 2 current density with 24 h of stability. The Fe 0.2 NiCo 1.8 Se 4 catalyst has a good Faradaic efficiency of 89.9% for overall water splitting. The nanorod morphology has a specific role in enhancing the electron transportation and conductivity of Fe 0.2 NiCo 1.8 Se 4 . The doping with Fe in NiCo 2 Se 4 enhances the active sites and increases its electrocatalytic performance. The SCN − poisoning effect on metal ions in Fe 0.2 NiCo 1.8 Se 4 suggests that Fe, Co, and Ni metals have a prominent impact on the overall electrocatalytic activity. Additionally, DFT investigation indicates that after Fe doping in a NiCo 2 Se 4 zero band gap, minimum Gibbs free energy, maximum hydrogen, and oxygen coverage calculations are accountable for the higher conductivity of the system. This research provides a simple approach for synthesizing a Fe-doped ternary NiCo 2 Se 4 nanorod array on the surface of carbon cloth, which is highly active and stable for water splitting in an alkaline medium.

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Multiphase nanosheet-nanowire cerium oxide and nickel-cobalt phosphide for highly-efficient electrocatalytic overall water splitting

Cited by 84 publications

References 77 publications

Recent Advances in Electrocatalytic Nitrate Reduction to Ammonia: Mechanism Insight and Catalyst Design

Recent Advances in Electrocatalytic Nitrate Reduction to Ammonia: Mechanism Insight and Catalyst Design

Rational Design of Molybdenum‐Doped Cobalt Nitride Nanowire Arrays for Robust Overall Water Splitting

Fe-Doped NiCo₂Se₄ Nanorod Arrays as Electrocatalysts for Overall Electrochemical Water Splitting

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Multiphase nanosheet-nanowire cerium oxide and nickel-cobalt phosphide for highly-efficient electrocatalytic overall water splitting

Cited by 84 publications

References 77 publications

Recent Advances in Electrocatalytic Nitrate Reduction to Ammonia: Mechanism Insight and Catalyst Design

Recent Advances in Electrocatalytic Nitrate Reduction to Ammonia: Mechanism Insight and Catalyst Design

Rational Design of Molybdenum‐Doped Cobalt Nitride Nanowire Arrays for Robust Overall Water Splitting

Fe-Doped NiCo2Se4 Nanorod Arrays as Electrocatalysts for Overall Electrochemical Water Splitting

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Fe-Doped NiCo₂Se₄ Nanorod Arrays as Electrocatalysts for Overall Electrochemical Water Splitting