Study on the performance of X‐ray machines used in K‐fluorescent devices

Li, Mengshi; Lu, Xiaoxue; Wu, Jinjie; Guo, Siming

doi:10.1049/joe.2018.9104

Cited by 8 publications

(6 citation statements)

References 6 publications

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“…In the Bi L 3 ‐edge extended X‐ray absorption fine structure (EXAFS, Figure 2d) spectra, Bi 1 Pd exhibits the strong peak at 2.57 Å assigned to PdBi bond, which differs from the peak positions of BiBi (2.73 Å) and BiO (1.56 Å) bonds, signifying the atomically dispersed Bi atoms. [ 40–42 ] This result can also be ascertained by the EXAFS fitting analysis (Figure S3 and Table S1, Supporting Information), disclosing the negligible existence of BiBi bonds. The atomic isolation of Bi atoms can be further confirmed by the wavelet transform (WT, Figure 2e) contour plots, showing the dominant intensity of Pd‐Bi at 7.9 k −1 , whereas those BiBi and BiO intensity maxima are at 3.7 and 8.6 Å, respectively.…”

Section: Resultssupporting

confidence: 58%

Single‐Atom Bi Alloyed Pd Metallene for Nitrate Electroreduction to Ammonia

Chen

et al. 2023

Adv Funct Materials

179

100

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Electrochemical reduction of nitrate to ammonia (NO 3 RR) holds a great promise for attaining both NH 3 electrosynthesis and wastewater purification. Herein, single-atom Bi alloyed Pd metallene (Bi 1 Pd) is reported as a highly effective NO 3 RR catalyst, showing a near 100% NH 3 -Faradaic efficiency with the corresponding NH 3 yield of 33.8 mg h −1 cm −2 at −0.6 V versus RHE, surpassing those of almost all ever reported NO 3 RR catalysts. In-depth theoretical and operando spectroscopic investigations unveil that single-atom Bi electronically couples with its neighboring Pd atoms to synergistically activate NO 3 − and destabilize *NO on Bi 1 Pd, leading to the reduced energy barrier of the potential-determining step (*NO→*NOH) and enhanced protonation energetics of NO 3 − -to-NH 3 pathway.

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Section: Resultssupporting

confidence: 58%

Single‐Atom Bi Alloyed Pd Metallene for Nitrate Electroreduction to Ammonia

Chen

et al. 2023

Adv Funct Materials

179

100

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“…The controlled colorimetric tests (Figure S13, Supporting Information) and 14 NO 3 − / 15 NO 3 − isotopic labeling experiments (Figure 3c; Figure S14, Supporting Information) prove that the generated NH 3 originates from the NO 3 RR. [ 48–50 ]…”

Section: Resultsmentioning

confidence: 99%

Lewis Acid Fe‐V Pairs Promote Nitrate Electroreduction to Ammonia

Zhang

Shen

et al. 2023

Adv Funct Materials

115

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Electrochemical reduction of nitrate to ammonia (NO 3 RR) has been recognized as an appealing approach to realize both sustainable NH 3 production and waste nitrate removal. Herein, from the perspective of Lewis acid-base interaction, a single-atom Fe-doped V 2 O 5 (Fe-V 2 O 5 ) catalyst enriched is designed with Lewis acid sites, which present the maximum NH 3 -Faradaic efficiency of 97.1% with the corresponding NH 3 yield of 12.5 mg h −1 cm −2 at -0.7 V versus RHE. Mechanistic studies based on theoretical calculations and operando spectroscopic characterizations identify the creation of Lewis acid Fe-V pairs on Fe-V 2 O 5 , which can synergetically activate the NO 3 − , promote the hydrogenation energetics, and restrain the hydrogen evolution, leading to the enhanced NO 3 RR activity and selectivity.

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“…The NO 3 RR performance of FeB 2 normalized by electrochemically active surface area (ECSA, Figure S16) follows the similar trend (Figure S17), signifying the high intrinsic NO 3 RR activity of FeB 2 . In addition, the semi‐metallic nature of FeB 2 (Figure S18) enables the accelerated electron transfer to boost the catalytic NO 3 RR kinetics (Figure S19) [51–56] …”

Section: Figurementioning

confidence: 99%

Tandem Electrocatalytic Nitrate Reduction to Ammonia on MBenes

et al. 2023

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We demonstrate the great feasibility of MBenes as a new class of tandem catalysts for electrocatalytic nitrate reduction to ammonia (NO 3 RR). As a proof of concept, FeB 2 is first employed as a model MBene catalyst for the NO 3 RR, showing a maximum NH 3 -Faradaic efficiency of 96.8 % with a corresponding NH 3 yield of 25.5 mg h À 1 cm À 2 at À 0.6 V vs. RHE. Mechanistic studies reveal that the exceptional NO 3 RR activity of FeB 2 arises from the tandem catalysis mechanism, that is, B sites activate NO 3 À to form intermediates, while Fe sites dissociate H 2 O and increase *H supply on B sites to promote the intermediate hydrogenation and enhance the NO 3 À -to-NH 3 conversion.

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Study on the performance of X‐ray machines used in K‐fluorescent devices

Cited by 8 publications

References 6 publications

Single‐Atom Bi Alloyed Pd Metallene for Nitrate Electroreduction to Ammonia

Single‐Atom Bi Alloyed Pd Metallene for Nitrate Electroreduction to Ammonia

Lewis Acid Fe‐V Pairs Promote Nitrate Electroreduction to Ammonia

Tandem Electrocatalytic Nitrate Reduction to Ammonia on MBenes

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