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Corrosion engineering boosting bulk Fe_(50)Mn_(30)Co_(10)Cr_(10)high-entropy alloy as high-efficient alkaline oxygen evolution reaction electrocatalyst

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Journal of Materials Science & Technology 2022年第14期109卷 267-275页

作者： Pengfei Zhou Dong Liu Yuyun Chen Mingpeng Chen Yunxiao Liu Shi Chen chi tat kwok Yuxin Tang Shuangpeng Wang Hui Pan Institute of Applied Physics and Materials Engineering University of Macao999078Macao Department of Physics and Chemistry Faculty of Science and TechnologyUniversity of Macao999078Macao Department of Electromechanical Engineering Faculty of Science and TechnologyUniversity of Macao999078Macao College of Chemical Engineering Fuzhou UniversityFuzhou 350116China

Oxygen evolution reaction(OER)is a critical process in electrocatalytic water ***,the development of low-cost,highly efficient OER electrocatalysts by a simple method that can be used for industrial application on a large scale is still a huge ***,high entropy alloy(HEA)has acquired extensive attention,which may provide answers to the current ***,we report bulk Fe_(50)Mn_(30)Co_(10)Cr_(10),which is prepared by 3D printing on a large scale,as electrocatalyst for OER with high catalytic ***,an easy approach,corrosion engineering,is adopted for the first time to build an active layer of honeycomb nanostructures on its surface,leading to ultrahigh OER performance with an overpotential of 247 mV to achieve a current density of 10 mA cm^(-2),a low Tafel slope of 63 mV dec^(-1),and excellent stability up to 60 h at 100 mA cm^(-2)in 1 M *** excellent catalytic activity mainly originates from:(1)the binder-free self-supported honeycomb nanostructures and multi-component hydroxides,which improve intrinsic catalytic activity,provide rich active sites,and reduce interfacial resistance;and(2)the diverse valence states for multiple active sites to enhance the OER *** findings show that corrosion engineering is a novel strategy to improve the bulk HEA catalytic *** expect that this work would open up a new avenue to fabricate large-scale HEA electrocatalysts by 3D printing and corrosion engineering for industrial applications.

关键词： Electrocatalysis High entropy alloy Corrosion engineering Self-supporting Oxygen evolution reaction

Microbiologically Influenced Corrosion Behavior of Fe_(40)(CoCrMnNi)_(60) and Fe_(60)(CoCrMnNi)_(40) Medium Entropy Alloys in the Presence of Pseudomonas Aeruginosa

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Acta Metallurgica Sinica(English Letters) 2023年第3期36卷 379-390页

作者： Weiwei Chang Yangyang Li Huaibei Zheng Hongchang Qian Dawei Guo Shuyuan Zhang Yuntian Lou chi tat kwok Lap Mou Tam Dawei Zhang National Materials Corrosion and Protection Data Center Institute for Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing 100083China BRI Southeast Asia Network for Corrosion and Protection(MOE) Shunde Graduate School of University of Science and Technology BeijingFoshan 528399China State Key Laboratory of Metal Material for Marine Equipment and Application Anshan 114002China Department of Electromechanical Engineering University of MacaoMacao 999078China Institute for the Development and Quality Macao 999078China

In this work,the microbiologically influenced corrosion(MIC)of Fe_(40)(CoCrMnNi)_(60) and Fe_(60)(CoCrMnNi)_(40) medium entropy alloys(MEAs)induced by Pseudomonas aeruginosa(***)was *** behaviors during 14 days of immersion in sterile and ***-inoculated culture media are *** sterile conditions,both MEAs exhibited good corrosion resistance against the culture medium *** the presence of ***,the pitting corrosion of MEAs was *** results of inductively coupled plasma‒mass spectrometry(ICP‒MS)and potentiodynamic polarization tests showed that the presence of *** promoted the selective dissolution of passive film and accelerated the corrosion of *** results of X-ray photoelectron spectroscopy(XPS)and Mott-Schottky measurements further demonstrated the degradation effect of *** on the passive *** with Fe_(60)(CoCrMnNi)_(40),Fe_(40)(CoCrMnNi)_(60) manifested better resistance to the MIC caused by ***,which may be attributed to more Cr oxides and fewer Fe oxides of the passive film.

关键词： Microbiologically influenced corrosion Medium entropy alloys Pseudomonas aeruginosa

Remarkable synergistic effect in cobalt-iron nitride/alloy nanosheets for robust electrochemical water splitting

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Journal of Energy Chemistry 2022年第2期31卷 405-414页

作者： Mingpeng Chen Di Liu Baoye Zi Yuyun Chen Dong Liu Xinyu Du Feifei Li Pengfei Zhou Ye Ke Jielei Li Kin Ho Lo chi tat kwok Weng Fai Ip Shi Chen Shuangpeng Wang Qingju Liu Hui Pan Institute of Applied Physics and Materials Engineering University of MacaoMacaoChina Yunnan Key Laboratory for Micro/Nano Materials&Technology National Center for International Research on Photoelectric and Energy MaterialsSchool of Materials and EnergyYunnan UniversityKunming 650091YunnanChina Department of Electromechanical Engineering Faculty of Science and TechnologyUniversity of MacaoMacaoChina Department of Physics and Chemistry Faculty of Science and TechnologyUniversity of MacaoMacaoChina

Design and synthesis of noble-metal-free bifunctional catalysts for efficient and robust electrochemical water splitting are of significant importance in developing clean and renewable energy sources for sustainable energy ***,a simple three-step strategy is reported to construct cobalt-iron nitride/alloy nanosheets on nickel foam(CoFe-NA/NF)as a bifunctional catalyst for both hydrogen evolution reaction(HER)and oxygen evolution reaction(OER).The electrocatalyst with optimized composition(CoFe-NA2/NF)can achieve ultralow overpotentials of 73 mV and 250 mV for HER and OER,respectively,at a current density of 10 mA cm^(-2) in 1 M ***,the electrolyzer based on this electrocatalyst is able to boost the overall water splitting with a cell voltage of 1.564 V to deliver 10 mA cm^(-2) for at least 50 h without obvious performance ***,our experiment and theoretical calculation demonstrate that the combination of cobalt-iron nitride and alloy can have low hydrogen adsorption energy and facilitate water dissociation during *** addition,the surface reconstruction introduces metal oxyhydroxides to optimize the OER *** work may pave a new pathway to design bifunctional catalysts for overall water splitting.

关键词： Bifunctional electrocatalyst Metal nitride/alloy nanocomposite Overall water splitting High performance

阳极氧化AlCoCrFeNi高熵合金用于高效碱性电解水

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Science china Materials 2023年第3期66卷 1033-1041页

作者：周鹏飞黄宝琪牛朋达陈明鹏郭志达汤育欣李瑞迪王双鹏潘晖 Institute of Applied Physics and Materials Engineering University of MacaoMacao SAR 999078China Department of Electromechanical Engineering Faculty of Science and TechnologyUniversity of MacaoMacao SAR 999078China Science and Technology on High Strength Structural Materials Laboratory State Key Laboratory of Powder MetallurgyCentral South UniversityChangsha 410083China College of Chemical Engineering Fuzhou UniversityFuzhou 350116China Department of Physics and Chemistry Faculty of Science and TechnologyUniversity of MacaoMacao SAR 999078China

碱性水电解(AWE)作为一种具有工业应用前景的绿色制氢方法,能够用来改善能源短缺和环境污染问题.然而,由于电极材料昂贵且效率低下,这种方法生产氢气的效率比较低.本文采用块状AlCoCrFeNi高熵合金作为碱性电解水的有效电极.研究发现通... 详细信息

碱性水电解(AWE)作为一种具有工业应用前景的绿色制氢方法,能够用来改善能源短缺和环境污染问题.然而,由于电极材料昂贵且效率低下,这种方法生产氢气的效率比较低.本文采用块状AlCoCrFeNi高熵合金作为碱性电解水的有效电极.研究发现通过快速阳极氧化(5 min)处理的高熵合金可以同时对析氢和析氧反应(HER和OER)具有超高的催化活性,只需要880和845 m V的过电位就可以达到-500 mA cm-2(HER)和500 mA cm-2(OER)的电流密度.特别地,该催化剂只需要3.00 V就可以达到500 mA cm-2的全解水电流密度,并且在此电流密度下表现出超过100小时的出色稳定性.我们的研究表明,阳极氧化的块体AlCoCrFeNi高熵合金作为高效催化剂在工业水电解制氢中具有广阔的应用前景,有望用于缓解环境问题和能源危机.

关键词：阳极氧化碱性电解水高熵合金电流密度碱性水电解能源危机水电解制氢制氢方法

Mechanism of metastasis by membrane type 1-matrix metalloproteinase in hepatocellular carcinoma

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World Journal of Gastroenterology 2005年第40期11卷 6269-6276页

作者： Ying-chi Ip Siu-Tim Cheung Ka-Ling Leung Sheung-tat Fan Centre for the Study of Liver Disease and Department of Surgery

AIM To investigate the precise role of membrane type 1-matrix metalloproteinase （NTI-NNP） in hepatocellular carcinoma （HCC） metastasis. METHODS- Human HCC cells Hep3B with overexpression of MTT-MMP were established by stable transfection, and compared with control cells carrying the empty vector. Cells were examined in vivo for their differences in the metastatic ability of athymic nude mice, and analyzed in vito for their differences in invasion ability by invasion chamber coated with Matrigel, adhesion towards collagen I and migration through culture chamber. Cell proliferation and apoptosis in adherent and suspension status were evaluated by MTr and flow cytometry analysis. RESULTS We found that overexpression of MT1-MMP could increase intrahepatic metastasis in nude mice with orthotopic implantation of HCC cells （incidence of 100% [MT1-MMP transfectants] vs 40% [vector control transfectants], P〈0.05）. NT1-MMP could also enhance cell invasion through Natrigel （107.7 vs 39.3 cells/field, P〈0.001）, adhesion towards matrix （0.30 vs 0.12 absorbance unit at 540 nm, P〈0.001）, cell migration （89.3 vs 39.0 cells/field, P〈0.001）, and cell proliferation （24.3 vs 40.5 h/doubling, P〈0.001）. We also observed that NTI-NNP supported cell survival （71.4% vs 23.9%, P〈0.001） with reduced apoptosis （43.7% vs51.0%, P〈0.05） in an attachment-free environment. CONCLUSION： MT1-MMP overexpression could enhance metastasis. In addition to its active role in matrix degradation during tumor invasion, MT1-MMP enhances tumor cell survival upon challenge of detachment, which is important during metastasis when cells enter the circulation.

关键词： MT1-MMPIMMP14 Liver cancer Invasion Metastasis

Inflammatory pseudotumor of the liver in association with a gastrointestinal stromal tumor: A case report

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World Journal of Gastroenterology 2004年第12期10卷 1841-1843页

作者： Oswens S.Lo Ronnie T.Poon chi Ming Lam Sheung tat Fan Centre for the Study of Liver Disease and Department of Surgery The University of Hong KongPokfulamHong KongChina

Inflammatory pseudotumor of the liver is a rare benign lesion that can mimic a malignant liver nioplasm. A case of inflammatory pseudotumor of the liver found in association with a malignant gastrointestinal stromal tumor (GIST) of the small bowel was reported. The inflammatory pseudotumor was misdiagnosed as a metastasis from the GIST by frozen section. A correct diagnosis was made only after histopathological examination of the paraffin section of the resescted specimen. This case is psrticularly interesting because of the association of the two rare pathological entities and the diagnostic dilemma that arose from the similarity of their histological appearances. To our knowledge，this association has not been reported in the literature.

关键词：炎性肿瘤肝脏胃肠基质瘤 GIST 病理组织学

Acupuncture for low back pain:a clinical practice guideline from the Hong Kong taskforce of standardized acupuncture practice

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Journal of Traditional chinese Medicine 2022年第1期42卷 140-147页

作者： CHEN Haiyong YEUNG Wing-Fai YANG Mingxiao MU Jinglan ZIEA tat-chi NG Bacon Fung-Leung LAO Lixing School of chinese Medicine University of Hong KongHong Kong SARChina School of Nursing Hong Kong Polytechnic UniversityHong Kong SARChina Bendheim Integrative Medicine Center Memorial Sloan Kettering Cancer Center1429 First AvenueNew York 10021USA Department of Anesthesiology Nanjing Drum Tower HospitalNanjing University Medical SchoolNanjing210008China chinese Medicine Department Hong Kong Hospital AuthorityHong Kong SARChina Virginia University of Integrative Medicine FairfaxVA 22031USA

OBJECTIVE:To develop a clinical practice guideline to guide the treatment of low back pain by ***:An integrative approach of systematic review of literature,clinical evidence classification,expert opinion surveying,and consensus establishing via a Delphi program was utilized during the developing *** evidence-based practice standards and the personalized features of acupuncture were taken into ***:Based on clinical evidence and expert opinions,we developed a clinical practice guideline for the treatment of low back pain with *** recommendations have a wide coverage spanning from Western Medicine diagnosis and Traditional chinese Medicine syndrome differentiation,to acupuncture treatment procedures,as well as post treatment care for rehabilitation and *** recommendations for acupuncture practice included treatment principles,therapeutic regimens,and operational *** levels of evidence and strength of recommendation were rated for each procedure of ***:A clinical practice guideline for acupuncture treating low back pain was developed based on contemporary clinical evidence and experts'consensus to provide best currently agreeable practice guideline for domestic and international stakeholders.

关键词： acupuncture low back pain diagnosis syndrome differentiation rehabilitation practice guideline

Adeno-associated virus-mediated heme oxygenase-1 gene transfer suppresses the progression of micronodular cirrhosis in rats

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World Journal of Gastroenterology 2006年第13期12卷 2016-2023页

作者： Tung-Yu Tsui chi-Keung Lau Jian Ma Gabriel Glockzin Aiman Obed Hans J Schlitt Sheung-tat Fan Centre for the Study of Liver Disease and Department of Surgery the University of Hong Kong Pokfulam Hong Kong Department of Surgery University of Regensburg Medical Centre Regensburg Germany

AIM： To test the hypothesis that enhancement of the activity of heine oxygenase can interfere with processes of fibrogenesis associated with recurrent liver injury, we investigated the therapeutic potential of over-expression of heine oxygense-1 in a CCl4-induced micronodular cirrhosis model. METHODS： Recombinant adeno-associated viruses carrying rat HO-1 or GFP gene were generated, 1×10^12 vg of adeno-associated viruses were administered through portal injection at the time of the induction of liver fibrosis. RESULTS： Conditioning the rat liver with over-expression of HO-1 by rAAV/HO-1 significantly increased the HO enzymatic activities in a stable manner. The development of micronodular cirrhosis was significantly inhibited in rAAV/HO-1-transduced animals as compared to controls. Portal hypertension was markedly diminished in rAAV/HO-1-transduced animals as compared to controls, whereas there are no significant changes in systolic blood pressure. This finding was accompanied with improved liver biochemistry, less infiltrating macrophages and less activated hepatic stellate cells （HSCs） in rAAV/ HO-1-transduced livers. CONCLUSIONS： Enhancement of HO activity in the livers suppresses the development of cirrhosis.

关键词： Cirrhosis Portal hypertension Heme oxygenase Gene therapy Adeno-associated virus

Estimating liver weight of adults by body weight and gender

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World Journal of Gastroenterology 2006年第14期12卷 2217-2222页

作者： See ching Chan chi Leung Liu Chung Mau Lo Banny K Lam Evelyn W Lee Yik Wong Sheung tat Fan Centre for the Study of Liver Disease Department of Surgery The University of Hong Kong Pokfulam Hong Kong China Centre for the Study of Liver Disease Department of Radiology The University of Hong Kong Pokfulam Hong Kong China

AIM： To estimate the standard liver weight for assessing adequacies of graft size in live donor liver transplantation and remnant liver in major hepatectomy for cancer. METHODS： In this study, anthropometric data of body weight and body height were tested for a correlation with liver weight in 159 live liver donors who underwent donor right hepatectomy including the middle hepatic vein. Liver weights were calculated from the right lobe graft weight obtained at the back table, divided by the proportion of the right lobe on the computed tomography. RESULTS： The subjects, all chinese, had a mean age of 35.8 ± 10.5 years, and a female to male ratio of 118：41. The mean volume of the right lobe was 710.14 ±131.46 mL and occupied 64.55%±4.47% of the whole liver on computed tomography. Right lobe weighed 598.90±117.39 g and the estimated liver weight was 927.54 ± 168.78 g. When body weight and body height were subjected to multiple stepwise linear regression analysis, body height was found to be insignificant. Females of the same body weight had a slightly lower liver weight. A formula based on body weight and gender was derived： Estimated standard liver weight （g）=218＋BW （kg）× 12.3＋gender×51 （R^2 = 0.48）（female=0, male= 1）. Based on the anthropometric data of these 159 subjects, liver weights were calculated using previously published formulae derived from studies on Caucasian, .lapanese, Korean, and chinese. All formulae overestimated liver weights compared to this formula. The Japanese formula overestimated the estimated standard liver weight （ESLW） for adults less than 60 ***： A formula applicable to chinese males and females is available. A formula for individual races appears necessary.

关键词： Estimated standard liver weight Liver tranplantation