keyword
https://read.qxmd.com/read/38112494/insight-into-controllable-metal-support-interactions-in-metal-metal-electrocatalysts-for-efficient-energy-saving-hydrogen-production
#21
JOURNAL ARTICLE
Yang Liu, Hao Li, Xinghui Liu, Yixuan Wang, Lingling Wang, Taehun Yang, Amol R Jadhav, Jinqiang Zhang, Yang Wang, Mingbo Wu, Jin Yong Lee, Min Gyu Kim, Hyoyoung Lee
Controllable metal-support interaction (MSI) modulations have long been studied for improving the performance of catalysts supported on metal oxides. However, the corresponding in-depth study for metal1 -metal2 (M1 -M2 ) composited configurations is rarely achieved due to the lack of reliable models and manipulation mechanisms of MSI modifications. We modeled ruthenium on copper support (Ru-Cu) metal catalysts with negligible interfacial contact potential (e0.06 V) and investigated MSI-dependent hydrogen evolution reaction (HER) catalysis kinetics induced by an electronic hydroxyl (HO-) modifier...
December 19, 2023: ACS Nano
https://read.qxmd.com/read/38072807/overcoming-low-c-2-yield-in-acidic-co-2-electroreduction-modulating-local-hydrophobicity-for-enhanced-performance
#22
JOURNAL ARTICLE
Zhe Yao, Rui Lin
Operating electrochemical CO2 reduction reaction (CO2 RR) in acidic media has garnered considerable attention due to its sustainable electrolyte cycling and stable performance. Nevertheless, the severe parasitic hydrogen evolution reaction (HER) and decayed multi-carbon species (C2+ ) yield still hampers efficient CO2 RR in acid. Here, this work investigates the influence of local hydrophobicity on the acidic CO2 RR. By employing direct electrodeposition, the hydrophobicity of the catalyst layer can be finely tuned over a wide range without additive...
December 10, 2023: Small
https://read.qxmd.com/read/38061845/multiple-micronutrient-deficiencies-as-a-long-term-complication-of-bariatric-surgery
#23
JOURNAL ARTICLE
Devika Dixit, Vanessa I Rodriguez, Ashton A Naumann, Amir Y Kamel
Micronutrient deficiencies may develop as a long-term complication of bariatric surgery due to alteration of gut anatomy and disruption of normal gut absorption. Inadequate repletion of essential vitamin and mineral deficiencies can lead to multisystem dysfunction. We present a case of a woman in her 50s, with a history of Roux-en-Y gastric bypass over 10 years ago, who presented with generalised weakness and a diffuse desquamating rash. A punch biopsy performed was compatible with nutritional deficiency. Labs revealed low levels of micronutrients A, B1 , B6 , C, E, zinc and copper...
December 7, 2023: BMJ Case Reports
https://read.qxmd.com/read/38058556/analyzing-synthesis-routes-for-bacupo-4-implications-for-hydrogen-evolution-and-supercapattery-performance
#24
JOURNAL ARTICLE
Sarfraz Ali, Haseebul Hassan, Muhammad Waqas Iqbal, Amir Muhammad Afzal, Mohammed A Amin, A Alhadrami, Nawal D Alqarni, Ehtisham Umar
In recent years, energy storage and conversion tools have evolved significantly in response to rising energy demands. Owing to their large surface area, superior electric and chemical stabilities, and thermal conductivities, barium copper phosphate (BaCuPO4 ) materials are promising electrode materials for electrochemical energy storage systems. In this study, the synthesis of nanostructures (NSs) using hydrothermal and chemical precipitation methods and exploring the electrochemical characteristics of BaCuPO4 in asymmetric supercapacitors provides a comparative investigation...
November 30, 2023: RSC Advances
https://read.qxmd.com/read/38050399/abnormal-uterine-bleeding-due-to-uterine-arteriovenous-malformation-in-an-early-adolescent-with-intrauterine-contraceptive-device-in-situ
#25
JOURNAL ARTICLE
Ilka Tan, Luke Toh
We report a case of uterine arteriovenous malformation in an early adolescent who presented with heavy vaginal bleeding 2 months after termination of pregnancy with copper intrauterine contraceptive device (IUCD) insertion. The patient was admitted and had medical treatment, including blood transfusion and subsequently transcatheter embolisation of the arteriovenous malformation to control her bleeding. The IUCD was left in situ. Her symptoms completely resolved by 4 months post-procedure.
December 1, 2023: BMJ Case Reports
https://read.qxmd.com/read/37909229/spark-plasma-sintered-catalytic-nickel-copper-alloy-and-carbon-nanotube-electrodes-for-the-hydrogen-evolution-reaction
#26
JOURNAL ARTICLE
Jean-Félix Boué, Cédric Espinet, Simon Amigues, David Mesguich, David Cornu, Yaovi Holade, Julien Cambedouzou, Christophe Laurent
We report the proof-of-concept of spark plasma sintered (SPS) consolidated mesoporous composite catalytic electrodes based on nickel-copper alloys and carbon nanotubes for the electrocatalytic hydrogen evolution reaction (HER) in alkaline media. The optimized electrode (203 m2 g-1 , 5 wt% Ni75 Cu25 ) operated at -0.1 A cm-2 (current of -0.15 A) for 24 h with a stable overpotential of about 0.3 V. This newly described freestanding SPS approach allows the rational control of specific surface area, metal loading, and electrocatalytic performance, thus opening a new route to catalytic electrodes with controllable physical and catalytic properties...
November 1, 2023: Chemical Communications: Chem Comm
https://read.qxmd.com/read/37895776/from-e-waste-to-hydrogen-evolution-harnessing-recycled-precious-metals-for-catalytic-efficiency-in-hydrogen-evolution-reactions
#27
JOURNAL ARTICLE
Stefan Mitrović, Snežana Brković, Sanja Živković, Nikola Zdolšek, Mina Seović, Jelena Georgijević, Ivana Perović
Against the background of escalating global electronic waste (e-waste) and its rich reservoir of elements, this research addresses the exploitation of precious metals from discarded CPUs for potential applications in hydrogen production. The study systematically explores the influence of varied CPU sample preparation techniques on the formation of an electrode's catalytic layer and the kinetics of the hydrogen evolution reaction (HER) in alkaline media. Four distinct e-waste samples, each subjected to different preparation protocols, were employed as sources in electrodeposition baths...
October 21, 2023: Materials
https://read.qxmd.com/read/37874123/tailoring-electrochemical-co2-reduction-on-copper-by-reactive-ionic-liquid-and-native-hydrogen-bond-donors
#28
JOURNAL ARTICLE
Oguz Kagan Coskun, Saudagar Dongare, Brian Doherty, Aidan Klemm, Mark Tuckerman, Burcu Gurkan
Electrochemical CO2 reduction (CO2RR) on copper (Cu) shows promise for higher-value products beyond CO. However, challenges such as the limited CO2 solubility, high overpotentials, and the competing hydrogen evolution reaction (HER) in aqueous electrolytes hinder the practical realization. We propose a functionalized ionic liquid (IL) which generates ion-CO2 adducts and a hydrogen bond donor (HBD) upon CO2 absorption to modulate CO2RR on Cu in a non-aqueous electrolyte. As revealed by transient voltammetry, electrochemical impedance spectroscopy (EIS), and in-situ surface-enhanced Raman spectroscopy (SERS) complemented with image charge augmented quantum-mechanical/molecular mechanics (IC-QM/MM) computations, a unique microenvironment is constructed...
October 24, 2023: Angewandte Chemie
https://read.qxmd.com/read/37857549/transition-metals-based-water-splitting-electrocatalysts-on-copper-based-substrates-the-integral-role-of-morphological-properties
#29
REVIEW
Shankary Selvanathan, Pei Meng Woi, Vidhya Selvanathan, Mohammad Rezaul Karim, Kamaruzzaman Sopian, Md Akhtaruzzaman
Electrocatalytic water splitting is a promising alternative to produce high purity hydrogen gas as the green substitute for renewable energy. Thus, development of electrocatalysts for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) are vital to improve the efficiency of the water splitting process particularly based on transition metals which has been explored extensively to replace the highly active electrocatalytic activity of the iridium and ruthenium metals-based electrocatalysts...
October 19, 2023: Chemical Record: An Official Publication of the Chemical Society of Japan ... [et Al.]
https://read.qxmd.com/read/37807252/a-116-wernicke-s-encephalopathy-in-the-setting-of-cacosmia-secondary-to-covid-19
#30
JOURNAL ARTICLE
Kirk Szczepkowski, Maya Pinjala, Hana Kuwabara
OBJECTIVE: Olfactory and gustatory dysfunction are common symptoms in COVID-19, with some individuals developing persistent parosmia/cacosmia despite resolution of acute infection. There have been few case reports of Wernicke's encephalopathy (WE) resulting from complications of COVID-19, including malnutrition due to significant emesis and parosmia/cacosmia. This case presents a neuropsychological profile of a patient with WE following COVID-19. METHOD: Patient is a 40-year-old female who acquired COVID-19 in early 2021 that did not require significant intervention...
October 8, 2023: Archives of Clinical Neuropsychology: the Official Journal of the National Academy of Neuropsychologists
https://read.qxmd.com/read/37805367/ramen-noodle-neuropathy-an-atypical-case-of-partial-paralysis-from-malnutrition
#31
REVIEW
Adam Lalley, Sabrina Bawa, Elie Harmouche
INTRODUCTION: Due to a COVID-related job loss resulting in financial and food insecurity, a 28-year-old woman initiated a diet consisting solely of one cup of ramen noodles daily for twenty-two months, leading to 27 kg of weight loss. Ramen noodles are low in calories and lack key nutrients, including potassium, chloride, and vitamin B12. CASE DESCRIPTION: The patient presented to the emergency department with acute, worsening weakness and paresthesias in her left wrist and hand...
January 2024: American Journal of Emergency Medicine
https://read.qxmd.com/read/37795987/roles-of-heterojunction-and-cu-vacancies-in-the-au-cu-2-x-se-for-the-enhancement-of-electrochemical-nitrogen-reduction-performance
#32
JOURNAL ARTICLE
Yujin Jeong, Gnanaprakasam Janani, Dohun Kim, Tae-Yong An, Subramani Surendran, Hyunjung Lee, Dae Jun Moon, Joon Young Kim, Mi-Kyung Han, Uk Sim
The utilization of hydrogen (H2 ) as a fuel source is hindered by the limited infrastructure and storage requirements. In contrast, ammonia (NH3 ) offers a promising solution as a hydrogen carrier due to its high energy density, liquid storage capacity, low cost, and sustainable manufacturing. NH3 has garnered significant attention as a key component in the development of next-generation refueling stations, aligning with the goal of a carbon-free economy. The electrochemical nitrogen reduction reaction (ENRR) enables the production of NH3 from nitrogen (N2 ) under ambient conditions...
October 5, 2023: ACS Applied Materials & Interfaces
https://read.qxmd.com/read/37781897/electrocatalytic-hydrogen-evolution-by-a-dinuclear-copper-complex-and-mechanistic-elucidation-through-dft-studies
#33
JOURNAL ARTICLE
Manaswini Raj, Koushik Makhal, Dev Raj, Aman Mishra, Bhabani S Mallik, Sumanta Kumar Padhi
A novel dinuclear copper complex, [CuII2(L1)2] (L1 = 2-{[2-(8-hydroxyquinolin-2-yl)-1 H -benzimidazol-1-yl]methyl}quinolin-8-ol) was synthesised and characterised through various spectroscopic techniques. This dinuclear complex (as an electrocatalyst) was employed to examine the catalytic ability towards an electrochemical hydrogen evolution reaction (HER). Redox studies in 95/5 (v/v) DMF/H2 O with the addition of 30-equivalent AcOH (acid source) led to higher catalytic activities for the HER. The evolved H2 , as the resultant product, was detected and confirmed from gas chromatography to afford a faradaic efficiency of 93% at an applied potential of -1...
October 2, 2023: Dalton Transactions: An International Journal of Inorganic Chemistry
https://read.qxmd.com/read/37736439/zinc-induced-copper-deficiency-as-a-rare-cause-of-neurological-deficit-and-anemia
#34
Nithin Gupta, Martin F Carmichael
Upper respiratory infections (URIs) are common and carry a large economic burden due to missed work and school. This has prompted an increased interest in over-the-counter zinc supplementation to enhance immunity and reduce illness duration. Zinc's antiviral and anti-inflammatory effects have led to its inclusion in popular URI medications and a surge in supplement sales, particularly among the elderly. However, zinc over-supplementation in this population can lead to hypocupremia, causing various presentations such as anemia, paresthesia, and gait disturbances...
August 2023: Curēus
https://read.qxmd.com/read/37678018/leaching-behavior-of-copper-tailings-solidified-stabilized-using-hydantoin-epoxy-resin-and-red-clay
#35
JOURNAL ARTICLE
Kaofei Zhu, Yong He, Deshan Feng, Wenqiang Jiang, Keneng Zhang
Tailings produced by mining engineering and metal smelting industries have become a major challenge to the ecological environment and human health. Environmental compatibility, mechanical stability, and economic feasibility have restricted the treatment and reuse of tailings. A novel solidification/stabilization technology using hydantoin epoxy resin (HER) and red clay for copper tailing treatment was developed, and the leaching behaviors of solidified/stabilized copper tailings were investigated in this paper...
September 5, 2023: Journal of Environmental Management
https://read.qxmd.com/read/37667462/in-situ-grown-cu-dendrites-plasmonically-enhance-electrocatalytic-hydrogen-evolution-on-facet-engineered-cu-2-o
#36
JOURNAL ARTICLE
Hao Zhang, Jiefeng Diao, Yonghui Liu, Han Zhao, Bryan K Y Ng, Zhiyuan Ding, Zhenyu Guo, Huanxin Li, Jun Jia, Chang Yu, Fang Xie, Graeme Henkelman, Maria-Magdalena Titirici, John Robertson, Peter Nellist, Chunying Duan, Yuzheng Guo, D Jason Riley, Jieshan Qiu
Electrocatalytic hydrogen evolution reaction (HER) is widely regarded as one of the most efficient and sustainable strategies for hydrogen production. Up to now, most electrocatalysis research related to HER mainly focuses on stand-alone electrocatalysis and fails to pay attention to the integration of other driving forces such as light. Herein, Cu2 O nanostructures with different exposed crystal facets were synthesized by wet chemical methods for electrocatalytic HER, and it was found that the octahedral Cu2 O nanostructures with exposed crystal planes of (111) (O-Cu2 O) had the best hydrogen evolution performance...
September 4, 2023: Advanced Materials
https://read.qxmd.com/read/37664308/an-unusual-delayed-presentation-of-a-migrated-intrauterine-contraceptive-device-into-the-rectosigmoid-colon
#37
Wuen Lynn Toh, Whui Whui Lim, Wei Keat Andy Tan, Shau Khng Jason Lim
The current literature suggests that serious complications after intrauterine contraceptive device (IUCD) insertion are rare. We present a rare case of a migrated IUCD into the rectosigmoid colon. A 33-year-old woman (parity one) presented to the emergency department with a three-day history of flank pain, upper urinary tract infection symptoms, and a low-grade fever. Differentials initially included renal colic or pyelonephritis. However, subsequent computed tomography of the kidneys, ureters, and bladder (CT-KUB) and magnetic resonance imaging of the pelvis (MRI-pelvis) showed a migrated IUCD posterior to the uterine body, with both ends closely abutting onto the adjacent proximal rectum...
August 2023: Curēus
https://read.qxmd.com/read/37657184/resonance-raman-spectra-of-blue-copper-proteins-variable-temperature-spectra-of-thermus-thermophilus-hb27-laccase
#38
JOURNAL ARTICLE
Janice Kang, Jieun Shin, Harry B Gray, Jay R Winkler
The resonance Raman (rR) spectra of the oxidized type 1 copper active site (CuT1 ) in Thermus thermophilus HB27 laccase (Tth-lac) has been determined in the 20 to 80 °C temperature range using 633-nm excitation. The positions and relative intensities of rR peaks are virtually independent of temperature, indicating that CuT1 ligation is robust over the investigated range. The intensity-weighted average of Tth-lac Cu-SCys vibrations (<ν(Cu-SCys )>) = 423 cm-1 ) is higher than those of most cupredoxins but is comparable to those of other multicopper oxidases (MCOs)...
August 24, 2023: Journal of Inorganic Biochemistry
https://read.qxmd.com/read/37635736/partial-unilateral-lentiginosis-successfully-treated-with-the-combination-of-511-nm-and-578-nm-copper-bromide-laser-in-an-indonesian-woman
#39
Reti Hindritiani, Muhamad Radyn Haryadi Widjaya, Diah Puspitosari, Trustia Rizqandaru, Kartika Ruchiatan
Partial unilateral lentiginosis (PUL) is a pigmentation disorder characterized by multiple lentigines restricted to the normal skin in a unilateral and segmental pattern. Various lasers have been used for the treatment of this pigmented disorders, one of which is the copper bromide (CuBr) laser, which emits a dual-wavelength beam at 511 nm and 578 nm. A 35-year-old woman presented with multiple brown macules with a sharp demarcation from the midline of the forehead to the right cheek in a dermatomal distribution...
2023: Clinical, Cosmetic and Investigational Dermatology
https://read.qxmd.com/read/37622007/photoelectrocatalytic-hydrogen-evolution-reaction-stimulated-by-the-surface-plasmon-resonance-effect-of-copper-and-silver-surrounded-with-mos-2
#40
JOURNAL ARTICLE
Yuanyuan Tian, Chengnan Qi, Ruihua Zhou, Dan Li, Tao Han
Developing plasmonic metal-based photocatalysts can improve the photoelectrocatalytic hydrogen evolution reaction (HER) and overcome the limitations of semiconductor-based photocatalysts. A MoS2 @Ag-Cu foam composite electrode was fabricated on a copper foam and employed for photoelectrocatalytic HER. The optical behavior and photoelectrocatalytic HER test results indicate that the surface plasmon resonance effect of copper and silver is the primary source of light absorption. Additionally, molybdenum sulfide was employed as a hot-electron trap to capture the energetic electrons generated from copper and silver, thereby promoting the hydrogen evolution reaction...
August 21, 2023: RSC Advances
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