Heterogeneous electrocatalysts design for nitrogen reduction reaction under ambient conditions

Publication date: Available online 23 March 2019Source: Materials TodayAuthor(s): Yuchi Wan, Jichu Xu, Ruitao LvAbstractAmmonia, as an important carbon-free energy carrier and also an important chemical for producing fertilisers, is mainly synthesized by a traditional Haber–Bosch process with high energy consumption and large amounts of greenhouse gas emissions. Recently, electrocatalytic nitrogen reduction reaction (NRR) has attracted worldwide research attentions as a promising route for achieving green and sustainable ammonia synthesis at ambient conditions. Although exciting advances have been made in the NRR field, the development of electrochemical nitrogen-to-ammonia conversion is still challenging because of the low ammonia yield and unsatisfactory Faradaic efficiency mainly deriving from the poor catalytic activity of catalysts. Herein, various catalyst design strategies for increasing the exposed active sites or altering the electronic structure aiming at improving the apparent activity or intrinsic activity are summarized in this review article. On the basis of effective design strategies, a range of recently reported NRR electrocatalysts, including noble metal-based materials, non-noble metal-based materials, single-metal-atom catalysts, and metal-free materials, are summarized, and the mechanisms of tuning the catalytic activity by applying the design strategies are emphasized based on the combination of theoretical calculations and experimental investigati...
Source: Materials Today - Category: Materials Science Source Type: research

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Authors: Mattacola CG PMID: 31014209 [PubMed - as supplied by publisher]
Source: Journal of Sport Rehabilitation - Category: Sports Medicine Tags: J Sport Rehabil Source Type: research
CONCLUSION: Prediction models regressed on persons with and without SCI under-predicted REE of competitive wheelchair rugby athletes. This outcome may be explained by the higher REE/fat-free mass (FFM) ratio of current athletes compared to less active samples. Findings from the current study will help practitioners to determine nutrient intake needs on training days of varied intensity. PMID: 31017540 [PubMed - as supplied by publisher]
Source: Journal of Spinal Cord Medicine - Category: Orthopaedics Tags: J Spinal Cord Med Source Type: research
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Source: Brain Injury - Category: Neurology Tags: Brain Inj Source Type: research
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Source: Brain Injury - Category: Neurology Tags: Brain Inj Source Type: research
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Source: Brain Injury - Category: Neurology Tags: Brain Inj Source Type: research
The objective of the study is to determine the effect of Channa striata extract toward the acceleration of tuberculosis treatment. The study used true experiment, in which the intervention of the study was Channa striata supplementation to respondent. In addition, Chi-square was used to analyze the data with SPSS version 22. The result is the proportion of respondent classified in negative category in intervention group within week 0, week 1, week 2, week 3, and week 4 being 10.7%, 35.9%, 56.3%, 70.9%, and 90.3%, respectively. Besides, the proportion of respondent classified in negative category in control group within wee...
Source: Interdisciplinary Perspectives on Infectious Diseases - Category: Infectious Diseases Tags: Interdiscip Perspect Infect Dis Source Type: research
Conclusion: Treatment of systemic loxoscelism involves aggressive supportive care including appropriate wound management, blood transfusions, intravenous fluid replacement, and appropriate antibiotic coverage. It is unclear at this time if glucocorticoids or IVIg has any beneficial impact on the treatment of severe loxoscelism. PMID: 31015839 [PubMed]
Source: Advances in Hematology - Category: Hematology Tags: Adv Hematol Source Type: research
Publication date: Available online 25 April 2019Source: Statistics &Probability LettersAuthor(s): Sam EfromovichAbstractSharp minimax nonparametric estimation is well known for functions from a Sobolev ellipsoid which is defined via Fourier coefficients of differentiable functions with specific boundary conditions. The theory is based on a renown lower bound of Pinsker (1980) and an adaptive estimator that attains it. This paper solves a long-standing problem of adaptive estimation without assuming boundary conditions.
Source: Statistics and Probability Letters - Category: Statistics Source Type: research
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Source: Current Topics in Medicinal Chemistry - Category: Chemistry Authors: Tags: Curr Top Med Chem Source Type: research
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Source: Physics Letters B - Category: Physics Source Type: research
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