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Ternary Ni-Co-Fe oxyhydroxide oxygen evolution catalysts:Intrinsic activity trends,electrical conductivity,and electronic band structure

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Nano Research 2019年第9期12卷 2288-2295页

作者： Michaela Burke Stevens lisa j. enman Ester Hamal Korkus j.remie Zaffran Christina D. M. Trang j.mes Asbury Matthew G. Kast Maytal Caspary Toroker Shannon W. Boettcher Department of Chemistry & Biochemistry and the Materials Science Institute University of OregonEugeneOR 97403USA Department of Materials Science & Engineering and The Nancy & Stephen Grand Technion Energy Program Technion Israel Institute of TechnologyHaifa 3200003Israel

Nickel-,cobalt-,and iron-based(oxy)hydroxides comprise the most-commonly studied electrocatalysts for the oxygen-evolution reaction(OER)in alkaline solution.A fundamental understanding of composition-structure-activity relationships for mixed-metal Ni-Co and Ni-Co-Fe(oxy)hydroxides is important to guide the design of advanced OER *** we use cyclic voltammetry,chronopotentiometry,inductively-coupled plasma-optical emission spectroscopy,and in situ electrical conductivity measurements to characterize the properties and activity of various compositions of Ni-Co-Fe(oxy)hydroxides prepared by cathodic *** with previous studies,we find Fe is essential for the mixed-metal(oxy)hydroxides to achieve high OER *** the rigorous absence of Fe(achieved by using specially cleaned electrolytes),the most-active Ni-Co(oxy)hydroxide composition has an OER turn-over frequency only twice that ofpure Co(oxy)hydroxide,suggesting minimal synergism between the two *** addition of Co to Ni-Fe(oxy)hydroxides shifts the onset of electrical conductivity to lower potentials,but has little effect on the intrinsic OER activity,with the most-active Ni-Co-Fe(oxy)hydroxide having an OER turn-over frequency only -1.5 times that of the Ni-Fe(oxy)*** magnitudes of the electrical conductivities are similar for all the compositions ***-functional-theory-calculated proj.cted density of states show a significant contribution of all chemical elements at the valence band edge of the mixed-metal oxyhydroxide electronic structure,demonstrating significant electronic hybridization between the *** calculations suggest the involvement of all the elements in modulating the electronic structure at putative Fe-based active sites that are probably located at edges or defects in the two-dimensional oxyhydroxide sheets.

关键词： electrocatalysis heterogeneous catalysis water electrolysis oxygen evolution density functional theory

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吉西他滨-卡铂方案后续贯性应用紫杉醇-卡铂方案作为晚期卵巢癌一线治疗方案:一项Ⅱ期研究

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世界核心医学期刊文摘（妇产科学分册） 2006年第9期2卷 52-53页

作者： Menp j.U. Gréenman S.E. j.lkanen j.T. 朱国栋 Division of Gynecologic Oncology Department of Obstetrics and Gynecology University Hospital P.O. Box 2000 FI-33521 Tampere Finland

Obj.ctive. To determine the feasibility and efficacy of sequential gemcitabine- carboplatin followed by paclitaxel- carboplatin in the first- line treatment of advanced epit-helial ovarian cancer, with the response rate as the primary endpoint. Methods. After primary laparotomy, 56 patients with FIGO Stages III- IV disease were given 4 cycles of gemcitabine 1000 mg/m2 d1,8 and carboplatin AUC5 (44 patients) or AUC6 (12 patients) d1 q3wk followed by 4 cycles of paclitaxel 175 mg/m2 d1 and carboplatin AUC5/6 q3wk. Of the tumors, 43 were serous, 6 clear cell, 4 endometrioid, and 3 anaplastic type. Thirty- seven (66.1% ) of the patients were suboptimally debulked. Results. Forty-seven patients were evaluable for response by CA- 125 criteria, and 46 (98% ) responded. Thirty patients (after gemcitabine- carboplatin) and 24 (after paclitaxel- carboplatin) were evaluable for response by CT (RECIST criteria), respectively. After the four gemcitabine- carboplatin cycles, the obj.ctive response rate was 83% (6 CR, 19 PR). Following completion of the whole sequential regimen, 7 patients showed a CR and 15 a PR, respectively, giving a response rate of 92% . The median progression- free survival was 12.8 months after a median follow- up of 19 months (range 7- 35 months)- .The median overall survival has not been reached yet. The main toxicity was neutropenia as 139/221 (62.9% ) of the gemcitabine- carboplatin cycles and 92/181 (50.8% ) of the paclitaxel- carboplatin cycles, respectively, were associated with Grades 3- 4 neutropenia. Neutropenia was reported as a serious adverse event in 5.7% of the cycles, and GCSF support was needed in 18.4% of the cycles. Only the gemcitabine- carboplatin cycles were associated with a marked thrombocytopenia (32.1% Grades 3- 4). Of the other side effects, marked allergy occurred in 14/52 (27% ) exposed to paclitaxel. A total of 14 patients discontinued the treatment prematurely: 3 due to lack of efficacy, 1 due to protocol violation, and 10 due

关键词：吉西他滨晚期卵巢癌治疗方案紫杉醇卡铂中性粒细胞减少症 Ⅱ期研究 RECIST标准

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