The controllable synthesis of substitutional and interstitial nitrogen-doped manganese dioxide: the effects of doping sites on enhancing the catalytic activity

He, Taohong; Zeng, Xiao-Shan; Rong, Shaopeng

doi:10.1039/d0ta01346c

Cited by 75 publications

(40 citation statements)

References 46 publications

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“…Over the past few years, a variety of cation‐doped MnO 2 has been synthesized and used in environmental purification. However, reports on anionic doping are very limited (N, [ 178,179 ] B, [ 180 ] and Se [ 177 ] doping only). This might due to the difficulty in realizing anion doping.…”

Section: Discussionmentioning

confidence: 99%

Section: Modification Of Mno2 Single Species Nanomaterialsmentioning

confidence: 99%

“…In addition to metal cation doping, nonmetal heteroanion (N, [ 178,179 ] B, [ 180 ] and Se [ 177 ] ) doping has also been reported, which can be used to replace the oxygen atoms in MnO 2 to adjust its intrinsic properties (crystal structure or electronic structure), consequently improving its catalytic activity. Generally speaking, nonmetal hetero‐anion doping may lead to the filling of oxygen vacancies, the expansion of interstitial sites, and the substitution of some oxygen anions.…”

Section: Modification Of Mno2 Single Species Nanomaterialsmentioning

confidence: 99%

“…From the current research, the nonthermal plasma method is considered an effective strategy to achieve nitrogen doping. [ 179 ] With the help of free electrons produced by plasma discharge, N 2 is collided into a large number of highly active N radical monomers, which are then accelerated by an electric field. The accelerated N radical monomers reach the surface of MnO 2 and react with it to realize doping.…”

Section: Modification Of Mno2 Single Species Nanomaterialsmentioning

confidence: 99%

“…Rong et al. [ 179 ] fabricated the N‐atom doping of MnO 2 by plasma technology (Figure 11f) and achieved substitutional site N‐atom doping and interstitial sites N‐atom doping by controlling the plasma processing time. They studied the influence of N‐doping sites on the intrinsic characteristics (atomic structure, valence state, and electronic structure) and the catalytic performance of MnO 2 .…”

Section: Modification Of Mno2 Single Species Nanomaterialsmentioning

confidence: 99%

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MnO₂‐Based Materials for Environmental Applications

et al. 2021

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Manganese dioxide (MnO2) is a promising photo–thermo–electric‐responsive semiconductor material for environmental applications, owing to its various favorable properties. However, the unsatisfactory environmental purification efficiency of this material has limited its further applications. Fortunately, in the last few years, significant efforts have been undertaken for improving the environmental purification efficiency of this material and understanding its underlying mechanism. Here, the aim is to summarize the recent experimental and computational research progress in the modification of MnO2 single species by morphology control, structure construction, facet engineering, and element doping. Moreover, the design and fabrication of MnO2‐based composites via the construction of homojunctions and MnO2/semiconductor/conductor binary/ternary heterojunctions is discussed. Their applications in environmental purification systems, either as an adsorbent material for removing heavy metals, dyes, and microwave (MW) pollution, or as a thermal catalyst, photocatalyst, and electrocatalyst for the degradation of pollutants (water and gas, organic and inorganic) are also highlighted. Finally, the research gaps are summarized and a perspective on the challenges and the direction of future research in nanostructured MnO2‐based materials in the field of environmental applications is presented. Therefore, basic guidance for rational design and fabrication of high‐efficiency MnO2‐based materials for comprehensive environmental applications is provided.

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Section: Discussionmentioning

confidence: 99%

Section: Modification Of Mno2 Single Species Nanomaterialsmentioning

confidence: 99%

Section: Modification Of Mno2 Single Species Nanomaterialsmentioning

confidence: 99%

Section: Modification Of Mno2 Single Species Nanomaterialsmentioning

confidence: 99%

Section: Modification Of Mno2 Single Species Nanomaterialsmentioning

confidence: 99%

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MnO₂‐Based Materials for Environmental Applications

et al. 2021

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A Universal Voltage Design for Triggering Manganese Dioxide Defects Construction to Significantly Boost the Pseudocapacitance

Yan

Zhu

Hao

et al. 2021

Adv Funct Materials

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Electrochemical activation can be appropriate for constructing tunable/controllable defects within the interior of electrode materials. However, the activation mechanisms under different applied electric fields urgently need to be systematically explored. Herein, the electrochemically activated manganese dioxide (MnO 2 ) samples are prepared via applying a positive/negative electric field, and two different activation mechanisms are revealed through a series of characterization methods. During the activation process, it is fascinating to discover that MnO 2 mainly generates the O vacancies under positive voltage, whereas the electrolyte cations are embedded in the interlayer under negative voltage. The generated O vacancies and intercalated ions not only act as active sites or participate in the charge-transport process, but also enhance the transmission capability of carriers. In contrast, the specific capacitances of optimized MnO 2 samples are 2.9 and 2.8 times than that of pure-MnO 2 after electrochemical activation under positive and negative voltage, respectively. In addition, the activated samples exhibit excellent cycle stability and resistance to electrochemical corrosion, which can well-maintain the 3D network structure composed of nanosheets after 5000 cycles. This strategy opens up a promising approach for exploring efficient and corrosion-resistant electrode materials.

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Oxygen Vacancies‐Rich Metal Oxide for Electrocatalytic Nitrogen Cycle

Wei,

Chen,

et al. 2023

Advanced Energy Materials

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The development of industry and agriculture has been accompanied by an artificially imbalanced nitrogen cycle, which threatens human health and ecological environments. Electrocatalytic systems have emerged as a sustainable way of converting nitrogen‐containing molecules into high value‐added chemicals. However, the construction of high‐performance electrocatalysts remains challenging. The development of oxygen vacancy engineering strategy has promoted more research efforts to explore the structure‐activity relationship between catalytic activity and oxygen vacancies. This review systematically summarizes the recent development of oxygen vacancies‐rich metal oxides for electro‐catalyzing nitrogen cycling systems, involving electrocatalytic nitrate reduction reaction, nitric oxide reduction reaction, nitrogen reduction reaction, C─N coupling, urea oxidation reaction, and nitrogen oxidation reaction. First, the construction methods and characterization methods of oxygen vacancies are summarized. Then, the effect of oxygen vacancy on electrocatalytic activity of metal oxides is discussed in terms of regulating the electronic structures of electrocatalysts, improving the electroconductivity of catalysts, lowing the energy barrier, and strengthening adsorption and activation of intermediate species. Finally, future directions for oxygen vacancy engineering and electrocatalytic nitrogen cycle are anticipated.

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The controllable synthesis of substitutional and interstitial nitrogen-doped manganese dioxide: the effects of doping sites on enhancing the catalytic activity

Abstract: N atoms were selectively doped at substitutional or interstitial sites in the MnO2 lattice using N2 plasma. This research provides a site-selective N-doping method and a deep insight into the different effects of doping sites.

Cited by 75 publications

References 46 publications

MnO₂‐Based Materials for Environmental Applications

MnO₂‐Based Materials for Environmental Applications

A Universal Voltage Design for Triggering Manganese Dioxide Defects Construction to Significantly Boost the Pseudocapacitance

Oxygen Vacancies‐Rich Metal Oxide for Electrocatalytic Nitrogen Cycle

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The controllable synthesis of substitutional and interstitial nitrogen-doped manganese dioxide: the effects of doping sites on enhancing the catalytic activity

Abstract: N atoms were selectively doped at substitutional or interstitial sites in the MnO2 lattice using N2 plasma. This research provides a site-selective N-doping method and a deep insight into the different effects of doping sites.

Cited by 75 publications

References 46 publications

MnO2‐Based Materials for Environmental Applications

MnO2‐Based Materials for Environmental Applications

A Universal Voltage Design for Triggering Manganese Dioxide Defects Construction to Significantly Boost the Pseudocapacitance

Oxygen Vacancies‐Rich Metal Oxide for Electrocatalytic Nitrogen Cycle

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MnO₂‐Based Materials for Environmental Applications

MnO₂‐Based Materials for Environmental Applications