期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
双电极电解法合成高效WO_(3-x)/石墨烯析氧反应光电催化剂
1
作者 肖何 高建如 +6 位作者 赵曼 程晓茹 薛首峰 王晓霞 陈雯雯 贾建峰 武海顺 《Chinese Journal of Chemical Physics》 SCIE EI CAS CSCD 2023年第1期113-124,I0056-I0062,I0003,共20页
将非贵金属氧化物与石墨烯复合在一起可以构建高活性的析氧反应电催化剂.为了减少传统合成方法的复杂性,本文设计了一种简便的电化学合成方法制备高效的WO_(3-x)/石墨烯光电催化剂,通过双电极电解体系,将阴极的石墨剥离成石墨烯,钨丝阳... 将非贵金属氧化物与石墨烯复合在一起可以构建高活性的析氧反应电催化剂.为了减少传统合成方法的复杂性,本文设计了一种简便的电化学合成方法制备高效的WO_(3-x)/石墨烯光电催化剂,通过双电极电解体系,将阴极的石墨剥离成石墨烯,钨丝阳极在还原性电解质溶液中部分转化为富含氧空穴的WO_(3-x).在所有合成的样品中,WO_(3-x)/G-2表现出最佳的电催化析氧性能,在10 mA/cm^(2)时过电位为320 mV(无iR补偿),优于商RuO_(2)(341 mV).随着光照的引入,WO_(3-x)/G-2的活性大大增强,其过电位降低至290mV,这主要受益于光电流效应产生的额外反应路径和光生载流子(h^(+))产生的额外活性位点.表征结果表明,富含氧空穴的WO_(3-x)和石墨烯都有助于提高析氧性能.WO_(3-x)对析氧反应的活性影响由氧空穴浓度与粒径的协同作用决定.石墨烯不仅能够分散WO_(3-x)纳米颗粒,而且能提高材料整体导电性,促进电子传输.该工作为设计高效析氧反应WO_(3-x)/石墨烯光电催化复合材料提供了一种新思路和方法. 展开更多
关键词 电合成 氧化钨 石墨烯 光电催化剂 析氧反应
下载PDF
Comparison of Clinic and Ambulatory Blood Pressure in Response to Antihypertensive Drugs in Chinese Patients
2
作者 xiao-ru cheng YANG WANG +2 位作者 BO HU XUAN JIA WEI LI 《Biomedical and Environmental Sciences》 SCIE CAS CSCD 2007年第4期279-283,共5页
To compare the difference between 24-h ambulatory blood pressure (ABP) and trough clinic blood pressure (CBP) after 8 weeks of therapy. Methods The study used meta-regression analysis to summarize three randomized... To compare the difference between 24-h ambulatory blood pressure (ABP) and trough clinic blood pressure (CBP) after 8 weeks of therapy. Methods The study used meta-regression analysis to summarize three randomized, double-blind, active controlled trials in order to compare the difference between the magnitude of the reduction in 24-h average ABP and CBP Patients. Chinese patients with seated diastolic blood pressure (SDBP) 95-115 mmHg and ambulatory diastolic blood pressure (ADBP)≥85 mmHg. Results The average age of 126 patients was 47.7 + 8.3 years, ranging from 25 to 67 (95 males and 31 females). All regimens reduced 24-h ABP and CBP after 8 weeks of treatment. In the 126 patients the baseline 24-h SBP and DBP values (142.7/94.4 mmHg) were markedly lower than those for clinic values (152.6/102.6 mmHg; P〈0.0001). Similarly, the 24-h SBP and DBP values (132.7/87.7 mmHg) in week 8 were markedly lower than the clinic values (138.9/92.7 mmHg; P〈0.0001). The differences between the treatment-induced reductions in 24-h ABP and CBP were statistically significant (the difference was 3.7/3.3 mmHg for SBP/DBP, P=O.OO69/P〈O.O001). Conclusion All regimens significantly reduced seated CBP and ABP. The effect of antihypertensive treatment was greater on CBP than that on ABP, suggesting that assessment on effectiveness of an antihypertensive treatment using CBP readings only has to be carefully interpreted, and a more systematic application of ABP monitoring should be adopted. 展开更多
关键词 Ambulatory blood pressure Antihypertensive treatment Clinic blood pressure Essential Hypertension
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部