Nitrogen doping and titanium vacancies synergistically promote CO<sub>2</sub>fixation in seawater

Qu, Di; Peng, Xianyun; Mi, Yuying; Bao, Haihong; Zhao, Shunzheng; Liu, Xijun; Luo, Jun

doi:10.1039/d0nr03775c

Cited by 30 publications

(22 citation statements)

References 32 publications

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“…The anodic reaction during discharge is the same as Equations (4)(5)(6)(7)(8). Overall reaction during discharge can be described as follows…”

Section: E θmentioning

confidence: 99%

“…Excessive fossil energy resource consumption and extreme CO 2 emission cause serious environmental problems and energy crises. [1][2][3][4][5][6][7][8][9][10][11][12][13] One of the feasible ways to address these issues is to develop renewable energy conversion and storage technologies, such as water/seawater splitting, fuel cells, metal-ion batteries, and rechargeable metal-air/CO 2 batteries. [14][15][16][17][18][19][20][21][22][23][24][25] In particular, rechargeable aqueous Zn-CO 2 batteries are gaining particular attention due to their unique feature of simultaneous fixing CO 2 and generating electrical energy, as well as the high theoretical energy density, abundant raw materials, and high safety.…”

Section: Introductionmentioning

confidence: 99%

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Atomically Dispersed Metal‐Based Catalysts for Zn–CO₂Batteries

et al. 2022

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Rechargeable aqueous Zn–CO2 batteries show great promise in meeting severe environmental problems and energy crises due to their combination of CO2 utilization and energy output, as well as advantages of high theoretical energy density, abundant raw materials, and high safety. Developing high‐efficiency and stable CO2 reduction reaction (CO2RR) electrocatalysts is of critical importance for the promotion of this technology. Atomically dispersed metal‐based catalysts (ADMCs), with extremely high atom‐utilization efficiency, tunable coordination environments, and superior intrinsic catalytic activity, are emerging as promising candidates for Zn–CO2 batteries. Herein, some recent developments in atomically dispersed metal‐based catalysts for Zn–CO2 batteries are summarized, including transition metal and non‐transition metal sites. Moreover, various synthetic strategies, characterization methods, and the relationship between active site structures and CO2RR activity/Zn–CO2 battery performance are introduced. Finally, some challenges and perspectives are also proposed for the future development of ADMCs in Zn–CO2 batteries.

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“…The anodic reaction during discharge is the same as Equations (4)(5)(6)(7)(8). Overall reaction during discharge can be described as follows…”

Section: E θmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Atomically Dispersed Metal‐Based Catalysts for Zn–CO₂Batteries

et al. 2022

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“…Ti 2 CT x [188] Termination engineering -0.1 m KHCO 3 56.1 SA-Cu-MXene [105] Heteroatom doping GCE 0.1 m KHCO 3 59.1 NTC-VTi [189] Heteroatom doping/defect engineering CP Seawater 92 and charge transfer between the two components resulted in a significant OER performance and structural stability (Figure 13B-b,c). During the reaction, there was a good balance between adsorption and desorption, thereby enhancing .…”

Section: Oxygen Evolution Reactionmentioning

confidence: 99%

Tunable Structured MXenes With Modulated Atomic Environments: A Powerful New Platform for Electrocatalytic Energy Conversion

Xiao

Zheng

et al. 2022

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Owing to their rich surface chemistry, high conductivity, tunable bandgap, and thermal stability, structured 2D transition‐metal carbides, nitrides, and carbonitrides (MXenes) with modulated atomic environments have emerged as efficient electrochemical energy conversion systems in the past decade. Herein, the most recent advances in the engineering of tunable structured MXenes as a powerful new platform for electrocatalytic energy conversion are comprehensively summarized. First, the state‐of‐the‐art synthetic and processing methods, tunable nanostructures, electronic properties, and modulation principles of engineering MXene‐derived nanoarchitectures are focused on. The current breakthroughs in the design of catalytic centers, atomic environments, and the corresponding structure–performance correlations, including termination engineering, heteroatom doping, defect engineering, heterojunctions, and alloying, are discussed. Furthermore, representative electrocatalytic applications of structured MXenes in energy conversion systems are also summarized. Finally, the challenges in and prospects for constructing MXene‐based electrocatalytic materials are also discussed. This review provides a leading‐edge understanding of the engineering of various MXene‐based electrocatalysts and offers theoretical and experimental guidance for prospective studies, thereby promoting the practical applications of tunable structured MXenes in electrocatalytic energy conversion systems.

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“…With their specific layered structure, 2D transition metal carbides and nitrides (MXenes) show high conductivity, high chemical stability, and multiple catalytic sites. Li et al calculated the catalytic activity of single-component MXenes by DFT, and the results showed that Cr 3 C 2 T x and Mo 3 C 2 T x are the best candidates for the electrochemical reduction of CO 2 to CH 4 [163] . These two materials favor the activation of CO 2 rather than H 2 O, resulting in highly efficient CO 2 electro-reduction and HER suppression.…”

Section: Other 2d Materialsmentioning

confidence: 99%

Two-dimensional materials: synthesis and applications in the electro-reduction of carbon dioxide

Yin¹,

Kang²,

Han³

2022

Chem Synth

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The emission of CO2 has become an increasingly prominent issue. Electrochemical reduction of CO2 to value-added chemicals provides a promising strategy to mitigate energy shortage and achieve carbon neutrality. Two-dimensional (2D) materials are highly attractive for the fabrication of catalysts owing to their special electronic and geometric properties as well as a multitude of edge active sites. Various 2D materials have been proposed for synthesis and use in the conversion of CO2 to versatile carbonous products. This review presents the latest progress on various 2D materials with a focus on their synthesis and applications in the electrochemical reduction of CO2. Initially, the advantages of 2D materials for CO2 electro-reduction are briefly discussed. Subsequently, common methods for the synthesis of 2D materials and the role of these materials in the electrochemical reduction of CO2 are elaborated. Finally, some perspectives for future investigations of 2D materials for CO2 electro-reduction are proposed.

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Nitrogen doping and titanium vacancies synergistically promote CO₂fixation in seawater

Abstract: N-Doped Ti3C2 MXenes with abundant titanium vacancies can be used in seawater with reasonable efficiency and good selectivity for CO2 electrolysis.

Cited by 30 publications

References 32 publications

Atomically Dispersed Metal‐Based Catalysts for Zn–CO₂Batteries

Atomically Dispersed Metal‐Based Catalysts for Zn–CO₂Batteries

Tunable Structured MXenes With Modulated Atomic Environments: A Powerful New Platform for Electrocatalytic Energy Conversion

Two-dimensional materials: synthesis and applications in the electro-reduction of carbon dioxide

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Nitrogen doping and titanium vacancies synergistically promote CO2fixation in seawater

Abstract: N-Doped Ti3C2 MXenes with abundant titanium vacancies can be used in seawater with reasonable efficiency and good selectivity for CO2 electrolysis.

Cited by 30 publications

References 32 publications

Atomically Dispersed Metal‐Based Catalysts for Zn–CO2Batteries

Atomically Dispersed Metal‐Based Catalysts for Zn–CO2Batteries

Tunable Structured MXenes With Modulated Atomic Environments: A Powerful New Platform for Electrocatalytic Energy Conversion

Two-dimensional materials: synthesis and applications in the electro-reduction of carbon dioxide

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Nitrogen doping and titanium vacancies synergistically promote CO₂fixation in seawater

Atomically Dispersed Metal‐Based Catalysts for Zn–CO₂Batteries

Atomically Dispersed Metal‐Based Catalysts for Zn–CO₂Batteries