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铁钴普鲁士蓝类似物中性条件下硝酸根电化学加氢制氨的活性来源研究 被引量:1
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作者 叶盛华 杨秀元 +9 位作者 黄振城 陈志达 陈文达 黄涛 区芷君 熊伟 李永亮 任祥忠 刘剑洪 张黔玲 《Science China Materials》 SCIE EI CAS CSCD 2023年第9期3573-3581,共9页
在温和的大气条件下通过电化学硝酸根还原反应(nitrate reduction reaction, NO_(3)^(-)RR)制氨是合成氨的可行方法,也是一种很有前途的储氢策略.本研究首次将生长在碳纤维布上的铁钴普鲁士蓝类似物层状立方阵列用作NO_(3)^(-)RR的电催... 在温和的大气条件下通过电化学硝酸根还原反应(nitrate reduction reaction, NO_(3)^(-)RR)制氨是合成氨的可行方法,也是一种很有前途的储氢策略.本研究首次将生长在碳纤维布上的铁钴普鲁士蓝类似物层状立方阵列用作NO_(3)^(-)RR的电催化剂,并且在中性的磷酸盐缓冲溶液中获得了令人满意的氨产率(1788.4μg h^(-1)cm^(-2))和法拉第效率(81.01%).电化学结果和原位拉曼光谱表明,氰基对提高催化活性至关重要.通过前沿轨道理论对催化剂的催化活性进行了解释:氰基可以提高催化剂最高占据态(即最高占据分子轨道)的能量,促进电子从催化剂的最高占据态跃迁至硝酸根离子的最低未占据分子轨道,并实现吸附中间体吉布斯自由能的优化,从而加速NO_(3)^(-)RR. 展开更多
关键词 分子轨道 硝酸根 吉布斯自由能 可行方法 前沿轨道 磷酸盐缓冲溶液 原位拉曼光谱 电催化剂
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Concentration of circulating microparticles:a new biomarker of acute heart failure after cardiac surgery with cardiopulmonary bypass 被引量:5
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作者 Yuquan Li Haoxiang Yuan +8 位作者 Caiyun Chen Chao Chen Jian Ma Yating Chen Yan Li Yupeng Jian Donghong Liu zhijun ou Jingsong ou 《Science China(Life Sciences)》 SCIE CAS CSCD 2021年第1期107-116,共10页
Acute heart failure(AHF)is a severe complication after cardiac surgery with cardiopulmonary bypass(CPB).Although some AHF biomarkers have been used in clinic,they have limitations when applied in the prediction and di... Acute heart failure(AHF)is a severe complication after cardiac surgery with cardiopulmonary bypass(CPB).Although some AHF biomarkers have been used in clinic,they have limitations when applied in the prediction and diagnosis of AHF after cardiac surgery with CPB,and there are still no effective and specific biomarkers.We and other researchers have shown that circulating microparticles(MPs)increased in a variety of cardiovascular diseases.However,whether the concentration of circulating MPs could be a new biomarker for AHF after cardiac surgery remains unknown.Here,90 patients undergoing cardiac surgery with CPB and 45 healthy subjects were enrolled.Patients were assigned into AHF(n=14)or non-AHF(n=76)group according to the diagnosis criteria of AHF.The concentrations of circulating MPs were determined before,as well as 12 h and 3 days after operation with nanoparticle tracking analysis technique.MPs concentrations in patients before surgery were significantly higher than those of healthy subjects.Plasma levels of MPs were significantly elevated at 12 h after surgery in patients with AHF,but not in those without AHF,and the circulating MPs concentrations at 12 h after surgery were higher in AHF group compared with non-AHF group.Logistic regression analysis indicated that MPs concentration at postoperative 12 h was an independent risk factor for AHF.The area under receiver operating characteristic curve for MPs concentration at postoperative 12 h was 0.87 and the best cut-off value is 5.20×10~8 particles mL~(–1)with a sensitivity of 93%and a specificity of 70%.These data suggested that the concentration of circulating MPs might be a new biomarker for the occurrence of AHF after cardiac surgery with CPB. 展开更多
关键词 MICROPARTICLES CONCENTRATION acute heart failure cardiopulmonary bypass BIOMARKER
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