Plasmon-enhanced photo(electro)chemical nitrogen fixation under ambient conditions using visible light responsive hybrid hollow Au-Ag2O nanocages

Chen

Chemical Engineering Journal

et al. 2020

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“…As revealed by 1 H-NMR spectra (Fig. 6b), the 1 H-NMR signal of reaction solution in the 14 [70,71]. These results confirmed that the NH 3 was indeed originates from N 2 .…”

Section: Resultssupporting

confidence: 63%

Defective titanium dioxide nanobamboo arrays architecture for photocatalytic nitrogen fixation up to 780 nm

Chen

Chemical Engineering Journal

et al. 2020

“…[1][2][3][4] Fixing N 2 is the necessaryr eaction for globale cosystem cycle, and the corresponding productiono fN H 3 is in urgent demandw ith wide applications in the agricultural industry,t he pharmaceutical industry,a nd energy storage. [5][6][7][8] In fact, population growth and social development are positivelyc orrelated with NH 3 output.A tp resent, N 2 fixation by naturald initrogenase is far below the standard required owing to sharply increased demands. [9,10] NH 3 is synthesized by the Haber-Bosch approach in very harsh conditions involving of high purity N 2 and H 2 ,w hichi sa ccompanied with the disadvantages of low productivity, release of ag reat deal of greenhouse gases,a nd massive energy consumption.…”

Section: Introductionmentioning

confidence: 99%

Keggin‐Type Polyoxometalate‐Based ZIF‐67 for Enhanced Photocatalytic Nitrogen Fixation

Wang

et al. 2020

ChemSusChem

The photocatalytic reduction of N2 to NH3 is considered a promising strategy to alleviate human need for accessible nitrogen and environmental pollution, for which developing a photocatalyst is an effective method to complete the transformation of this process. We firstly design a series of highly efficient and stable polyoxometalates (POMs)‐based zeolitic imidazolate framework‐67 (ZIF‐67) photocatalysts for N2 reduction. ZIF‐67 can effectively fix N2 owing to its porosity. Integration of POMs cluster contributes enormous advantages in terms of broadening the absorption spectrum to improve sunlight utilization, enhance the stability of the materials, effectively inhibit the recombination of photo‐generated electron–hole pairs, and reduce charge‐transfer impedance. POMs can absorb light to convert into reduced POMs, which have stronger reducing ability to provide ample electrons to reduce N2. The reduced POMs can recover their oxidation state through contact with an oxidant, which forms a self‐recoverable and recyclable photocatalytic fixing N2 system. The photocatalytic activity enhances with the increasing number V substitutions in the POMs. Satisfactorily, ZIF‐67@K11[PMo4V8O40] (PMo4V8) displays the most significant photocatalytic N2 activity with a NH3 yield of 149.0 μmol L−1 h−1, which is improved by 83.5 % (ZIF‐67) and 78.9 % (PMo4V8). The introduction of POMs provides new insights for the design of high‐performance photocatalyst nanomaterials to reduce N2.

Adv Energy and Sustain Res

“…Nazemi et al explored Ag 2 O semiconductor in combination with Au which was prepared from porous bimetallic Au-Ag nanocages using galvanic displacement technique and then oxygenated to yield Au-Ag 2 O hybrid structures ( Figure 3D). [54,55] The catalyst was coated onto an ITO substrate and was illuminated with a broadband light source (AM 1.5G) of 100 mW cm À2 intensity. Among all the different catalysts tested, Ag 2 O-Au had the highest NH 3 yield of 61.3 mg m À2 ( Figure 3E) and an average production rate of 28.2 mg m À2 h À1 .…”

Section: Plasmonic-semiconductor Hybrid Structuresmentioning

confidence: 99%

Photocatalytic Plasmon‐Enhanced Nitrogen Reduction to Ammonia

Monyoncho

Dasog

2021

Nitrogen reduction to ammonia under ambient conditions is an emerging area of research sparked by the increasing concerns over climate change which is driving the efforts to find alternatives to energy‐intensive Haber–Bosch process. Ammonia is a critical component in the manufacturing of fertilizers and is required to support the global food supply. It can also be used as a fuel source to generate electricity. Many strategies have been used to drive nitrogen reduction under milder conditions including incorporation of plasmonic nanomaterials. The ability of plasmonic nanomaterials to strongly interact with light, resulting in near‐field enhancement, hot charge‐carrier generation and injection, increase in local temperature, has made them attractive candidates for catalysis. This review provides a comprehensive survey of recent developments in photocatalytic, plasmon‐enhanced nitrogen conversion to ammonia and the proposed mechanisms for the increased catalytic activity. A brief outlook on the current challenges and future directions is also provided.