期刊文献+
共找到35,364篇文章
< 1 2 250 >
每页显示 20 50 100
氢气洗涤塔运行中存在的问题及改进措施 预览
1
作者 梁寅祥 刘伟 《氯碱工业》 CAS 2019年第7期16-17,共2页
介绍了氢气处理工艺流程。针对原氢气处理工艺过程中过滤器常堵塞的问题,从2方面改进了氢气洗涤塔工艺:①控制源头,改变水质;②对喷淋嘴进行钝化处理。改造后,解决了氢气洗涤塔在运行中出现的结垢、喷嘴堵塞、洗涤不充分等问题,同时降... 介绍了氢气处理工艺流程。针对原氢气处理工艺过程中过滤器常堵塞的问题,从2方面改进了氢气洗涤塔工艺:①控制源头,改变水质;②对喷淋嘴进行钝化处理。改造后,解决了氢气洗涤塔在运行中出现的结垢、喷嘴堵塞、洗涤不充分等问题,同时降低了检维修费用,提高了生产系统的稳定性。 展开更多
关键词 氢气 氢气处理 氢气洗涤塔 冷却器
在线阅读 下载PDF
Newly developed two-dimensional materials for efficient photocatalytic hydrogen evolution
2
作者 Xueying Zhan Fengmei Wang +2 位作者 Zhongzhou Cheng Zhenxing Wang Jun He 《科学通报:英文版》 SCIE EI CSCD 2019年第14期958-960,共3页
Due to the increasing environmental and energy issues, hydrogen, as a clean and non-carbon energy source, has received more and more attention in the past decades. Photocatalysis has been known as a promising approach... Due to the increasing environmental and energy issues, hydrogen, as a clean and non-carbon energy source, has received more and more attention in the past decades. Photocatalysis has been known as a promising approach for hydrogen generation and a key measure in solving serious environmental problems. Different from traditional catalysts, such as ZnO and TiO2, two-dimensional (2D) materials display unique advantages to hydrogen production due to their large specific surface area, high charge migration rate, tunable electronic structure and ultra-lightweight [1]. Especially, 2D materials show short migration distance for the generated electrons and holes, leading to the reduction of electron-hole recombination, which is one of the key factors affecting photocatalytic efficiency [2-4]. 展开更多
关键词 NEWLY DEVELOPED TWO-DIMENSIONAL MATERIALS PHOTOCATALYTIC HYDROGEN evolution HYDROGEN generation
新能源制氢技术发展现状及前景分析 预览
3
作者 黄格省 阎捷 +2 位作者 师晓玉 卢红 鲜楠莹 《石化技术与应用》 CAS 2019年第5期289-296,共8页
介绍了化学链制氢、生物质制氢、利用弃风/弃光电解水制氢、太阳能光催化分解水制氢等新型清洁能源制氢技术的研究与应用现状,对各种制氢技术的产业发展前景进行了分析。在氢燃料电池汽车产业发展过程中,化石原料制氢(包括工业副产氢气... 介绍了化学链制氢、生物质制氢、利用弃风/弃光电解水制氢、太阳能光催化分解水制氢等新型清洁能源制氢技术的研究与应用现状,对各种制氢技术的产业发展前景进行了分析。在氢燃料电池汽车产业发展过程中,化石原料制氢(包括工业副产氢气及化合物热分解制氢)仍将是制氢技术中的主流工艺路线,而生物质制氢、“绿电”电解水制氢、太阳能光催化分解水制氢等新能源制氢是化石原料制氢的重要补充,未来的氢气生产将呈现化石原料路线和可再生原料路线优势互补、多元化并存发展的格局。为推动新型清洁制氢技术的快速发展,建议我国政府应从国家层面持续做好顶层设计,对新能源制氢产业化项目给予产业政策扶持;国内科研院所应加强与企业的技术研发合作,加大开发绿色、低碳、低成本制氢技术,推动制氢技术进步和氢燃料电池汽车产业快速成长。 展开更多
关键词 氢气 化学链 生物质 电解水 风能 太阳能 燃料电池 发展前景
在线阅读 下载PDF
电解水制氢MoS2催化剂研究与氢能技术展望 预览 被引量:1
4
作者 王培灿 雷青 +1 位作者 刘帅 王保国 《化工进展》 EI CAS CSCD 北大核心 2019年第1期278-290,共13页
氢气具有质量轻、热值高、燃烧产物清洁等优点,被认为是理想的能源载体。氢气既能作为燃料电池的燃料,又能作为储能介质调节风能、太阳能发电系统的随机性、间歇性,正在成为未来能源的重要组成部分。为了促进电解水制氢技术与装备发展,... 氢气具有质量轻、热值高、燃烧产物清洁等优点,被认为是理想的能源载体。氢气既能作为燃料电池的燃料,又能作为储能介质调节风能、太阳能发电系统的随机性、间歇性,正在成为未来能源的重要组成部分。为了促进电解水制氢技术与装备发展,研究高效电催化剂十分重要。本文围绕“粉末型”与“自支撑型”电催化剂结构特征,讨论基于二硫化钼(MoS2)的析氢电催化剂的研究现状,阐述了催化活性位点调控策略与提高导电性两条技术途径,并以析氢过电位和塔菲尔曲线斜率为依据,比较不同方法制备的二硫化钼电催化剂的催化活性。表明提高二硫化钼晶相稳定性、调节其电子结构和优化催化电极结构等方法,将进一步提高基于二硫化钼的析氢催化电极性能。 展开更多
关键词 电催化剂 二硫化钼 电解水 制氢
在线阅读 免费下载
Improved hydrogen storage properties of LiBH4 confined with activated charcoal by ball milling
5
作者 He Zhou Xin-Hua Wang +2 位作者 Hai-Zhen Liu Shi-Chao Gao Mi Yan 《稀有金属:英文版》 SCIE EI CAS CSCD 2019年第4期321-326,共6页
In order to enhance the hydrogen storage properties of LiBH4,activated charcoal (AC) was used as the scaffold to confine LiBH4 in this paper.Ball milling was used to prepare LiBH4/AC composites.Experimental results sh... In order to enhance the hydrogen storage properties of LiBH4,activated charcoal (AC) was used as the scaffold to confine LiBH4 in this paper.Ball milling was used to prepare LiBH4/AC composites.Experimental results show that dehydrogenation properties of ball-milled LiBH4/AC (LiBH4/AC-BM) are greatly improved compared with that of pristine LiBH4,ball-milled LiBH4 (LiBH4-BM) and hand-milled LiBH4/AC (LiBH4/AC-HM).The onset dehydrogenation temperature of LiBH4 for LiBH4/AC-BM is around 160 ℃,which is 170 ℃ lower than that of pristine LiBH4.At around 400 ℃,LiBH4/AC-BM finishes the dehydrogenation with a hydrogen capacity of 13.6 wt%,which is approximately the theoretical dehydrogenation capacity of pure LiBH4 (13.8 wt%),while the dehydrogenation processes for LiBH4-BM and LiBH4/AC-BM do not finish even when they were heated to 600 ℃.The isothermal dehydriding measurements show that it takes only 15 min for LiBH4/AC-BM to reach a dehydrogenation capacity of 10.1 wt% at 350 ℃,whereas the pristine LiBH4 and the LiBH4/AC-HM release hydrogen less than 1 wt% under the same conditions.The dehydrogenation process and the effect of AC were discussed. 展开更多
关键词 HYDROGEN STORAGE properties HYDROGEN STORAGE materials LITHIUM BOROHYDRIDE Activated charcoal
氯碱企业副产氢气用于氢燃料电池现状及前景分析 预览
6
作者 李宁 赵国良 +2 位作者 王志元 商付滨 曹长青 《中国氯碱》 CAS 2019年第8期1-3,共3页
以氯碱企业对氢气的利用现状为切入点,深入研究氢气与氢燃料电池的技术特点并分析其未来发展与应用前景。
关键词 氯碱企业 氢气 氢燃料电池 现状及前景
在线阅读 下载PDF
降低1000 MW超超临界二次再热机组发电机漏氢量 预览
7
作者 李敏 《电力系统装备》 2019年第14期92-93,共2页
本文对某电厂1000MW二次再热机组发电机漏氢量偏大、补氢频繁的情况进行了分析,并对发电机本体以及相关密封油、氢气、定冷水系统进行排查分析,发现密封油温度设置不合理对发电机漏氢有较大影响。针对此问题,提出相应的解决方法,采取措... 本文对某电厂1000MW二次再热机组发电机漏氢量偏大、补氢频繁的情况进行了分析,并对发电机本体以及相关密封油、氢气、定冷水系统进行排查分析,发现密封油温度设置不合理对发电机漏氢有较大影响。针对此问题,提出相应的解决方法,采取措施后漏氢情况明显得到改善。 展开更多
关键词 发电机 氢气 漏氢 密封油
在线阅读 下载PDF
NiPt nanoparticles supported on CeO2 nanospheres for efficient catalytic hydrogen generation from alkaline solution of hydrazine
8
作者 Yana Men Jun Su +3 位作者 Xiangli Wang Ping Cai Gongzhen Cheng Wei Luo 《中国化学快报:英文版》 SCIE CAS CSCD 2019年第3期634-637,共4页
Searching for highly efficient catalysts toward dehydrogenation of hydrazine for chemical hydrogen storage is highly desirable for the development of hydrogen economy. Herein, we report a simple in situ co-reduction s... Searching for highly efficient catalysts toward dehydrogenation of hydrazine for chemical hydrogen storage is highly desirable for the development of hydrogen economy. Herein, we report a simple in situ co-reduction synthesis of NiPt nanoparticles supported on CeO2 nanospheres and their superior catalytic performance for hydrogen generation from alkaline solution of hydrazine at room temperature. Thanks to the strong electronic interaction arising from synergistic effect at atomic lever and support-metal interaction between NiPt and CeO2.The obtained Ni5Pt5-CeO2 catalyst exhibits 100% hydrogen selectivity and superior catalytic performance for hydrogen generation from alkaline solution of hydrazine at room temperature, with a TOF value of 416 h 1. 展开更多
关键词 HYDROGEN storage HYDRAZINE HYDROGEN evolution CEO2 NANOSPHERES Support-metal in teraction
光催化分解水制备氢气和过氧化氢 预览
9
作者 王利超 曹爽 +3 位作者 郭凯 吴志娇 马智 朴玲钰 《催化学报》 SCIE EI CAS CSCD 北大核心 2019年第3期470-475,共6页
过氧化氢不仅是一种广泛应用于化学合成、消毒、废水处理及纸浆漂白等领域的高价值化学品,还是一种具有潜力的能源载体.此外,过氧化氢燃料电池因其结构简单而受到广泛关注.蒽醌法是工业生产过氧化氢的传统方法,但是这种方法不仅能耗高,... 过氧化氢不仅是一种广泛应用于化学合成、消毒、废水处理及纸浆漂白等领域的高价值化学品,还是一种具有潜力的能源载体.此外,过氧化氢燃料电池因其结构简单而受到广泛关注.蒽醌法是工业生产过氧化氢的传统方法,但是这种方法不仅能耗高,而且生产过程会造成严重的环境问题.因此,通过环保并且低成本的工艺直接合成过氧化氢具有重要研究意义.以太阳能为动力的光催化法生产过氧化氢被认为是最有前景的方法之一.目前,光催化已在制氢、二氧化碳还原和水处理等诸多领域取得了重要进展.但是,利用光催化分解水制备过氧化氢的研究还非常少.尽管通过光催化还原氧气可以制备过氧化氢,但是通过分解水同时制备高价值过氧化氢和氢气更具有吸引力.在本项工作中,我们利用Pt/TiO2(锐钛矿)光催化剂在没有牺牲剂的条件下实现了高效产氢和过氧化氢,氢气和过氧化氢的生成速率分别达到7410和5096μmolg–1h–1(第一小时),远高于市售的Pt/TiO2(锐钛矿)体系和文献报道数值.本文采用X射线光电子能谱(XPS)、电子自旋共振(ESR)和荧光标记法等表征手段研究了Pt/TiO2上同时生成氢气和过氧化氢的催化机理.XPS测试结果表明,Pt/TiO2在光照射1h后,XPS信号发生明显变化.与其他样品相比,物理吸附水和羟基的峰明显增加.因此,我们推测羟基和物理吸附水对过氧化氢的生成具有重要影响.进一步采用电子自旋共振(ESR)和荧光标记法对羟基进行了测量.ESR结果显示,紫外光照60s即可检测到羟基捕获剂与羟基的结合物5,5-dimethyl-1-pyrroline-N-oxide-OH(DMPO-OH)的特征峰.此外,在体系中加入荧光标记分子对苯二甲酸(TANa)后也可以迅速检测到2-羟基对苯二甲酸(TAOH)在422nm处明显的荧光信号.因此,ESR和荧光结果均表明所产生的羟基自由基在过氧化氢形成中起着重要作用.上述结果表明,在本体系� 展开更多
关键词 光催化分解水 氢气 过氧化氢 锐钛矿
在线阅读 下载PDF
氢气型溴化锂制冷机组运行总结 预览
10
作者 费信怀 彭靖 《氯碱工业》 CAS 2019年第6期33-35,40共4页
介绍了以氢气为热能制取7℃冷冻水的溴化锂机组的工艺流程及运行情况,分析了机组在运行过程中存在的问题,并提出了解决及改造措施。
关键词 溴化锂 制冷机组 氢气 高压发生器 水封罐 真空度 氢气压力
在线阅读 下载PDF
TiAlN/TiMoN Coatings as Hydrogen Barriers 预览
11
作者 Motonori Tamura Hidekazu Takizawa 《材料科学与工程:中英文A版》 2019年第1期1-7,共7页
We evaluated the hydrogen barrier properties of a multi-layered coating of TiAlN/TiMoN.Coatings facilitated reductions of the hydrogen permeabilities to 1/1,000 of that of the uncoated substrate.The experiment confirm... We evaluated the hydrogen barrier properties of a multi-layered coating of TiAlN/TiMoN.Coatings facilitated reductions of the hydrogen permeabilities to 1/1,000 of that of the uncoated substrate.The experiment confirmed that the coatings composed of fine crystal grains were highly effective as hydrogen barriers,and that this barrier property became even more efficient if multiple layers of the coatings were applied.The crystal grain boundaries of the coating and interfaces of each film in a multi-layered coating can serve as hydrogen trapping sites.We speculate that fine crystal structures with multiple crystal grain boundaries and multi-layered coating interfaces will contribute to the development of hydrogen barriers. 展开更多
关键词 HYDROGEN PERMEATION multi-layered-coating microstructure HYDROGEN TRAPS
在线阅读 下载PDF
减缓柴油加氢装置硫化氢汽提塔顶空冷腐蚀的工艺研究 预览
12
作者 陈金仙 周尚 《化工设计通讯》 CAS 2019年第5期99-100,共2页
柴油加氢装置通过加氢反应将柴油馏分中的噻吩等硫化物转化为硫化氢,通过闪蒸和蒸汽汽提的方式脱除柴油馏分中溶解的硫化氢。硫化氢汽提塔顶空冷普遍出现管束腐蚀穿孔的现象。荆门石化加氢改质装置由热高分调整为温高分流程,汽提塔空冷... 柴油加氢装置通过加氢反应将柴油馏分中的噻吩等硫化物转化为硫化氢,通过闪蒸和蒸汽汽提的方式脱除柴油馏分中溶解的硫化氢。硫化氢汽提塔顶空冷普遍出现管束腐蚀穿孔的现象。荆门石化加氢改质装置由热高分调整为温高分流程,汽提塔空冷腐蚀严重,经常腐蚀穿孔,存在较大安全隐患。因此,拟通过对工艺条件进行调整,以降低硫化氢汽提塔顶空冷器腐蚀,延长设备使用寿命。 展开更多
关键词 柴油加氢 硫化氢 腐蚀 氢气汽提
在线阅读 下载PDF
Characteristics of MOF, MWCNT and graphene containing materials for hydrogen storage: A review 预览
13
作者 Kranthi Kumar Gangu Suresh Maddila +1 位作者 Saratchandra Babu Mukkamala Sreekantha B Jonnalagadda 《能源化学:英文版》 SCIE EI CAS CSCD 2019年第3期132-144,共13页
Hydrogen is a generally abundant, safe, clean and environmentally apt alternative fuel, which replen-ishes the void generated by depleting fossil fuel reserves. The adoption of hydrogen as an energy source has been re... Hydrogen is a generally abundant, safe, clean and environmentally apt alternative fuel, which replen-ishes the void generated by depleting fossil fuel reserves. The adoption of hydrogen as an energy source has been restricted to low levels due to the complications associated with its viable storage and us-age. Existing technologies, such as storage of hydrogen in compressed and liquefied forms are not ade-quate to meet the broad on-board applications. The gravimetric energy density (120 MJ/kg) of hydrogen is three times higher than that of gasoline products, so solid-state hydrogen storage is advantageous. Metal-organic frameworks (MOFs), multi-walled carbon nanotubes (MWCNTs) and graphene are solid ad-sorbents majorly employed for efficient H2 storage. The prominent features of MOFs such as permanent porosity, structural rigidity, and surface area are attractive and ideal for hydrogen storage. In addition, nanostructured carbon materials (MWCNTs and graphene) and their composites have demonstrated sig-nificant hydrogen storage capacities. Some important parameters for the success of the hydrogen econ-omy include high storage density, adsorption/desorption temperature and cycling time. Cryo-hydrogen storage was achieved in MOFs and their composites with carbon structures, but storage at ambient tem-perature and acceptable pressures is a major hurdle. This review discusses various strategies and mecha-nisms in the design of adsorbents explored to improve H2 storage capacities and afford opportunities to develop new sustainable hydrogen technologies to meet energy targets. 展开更多
关键词 HYDROGEN storage METAL-ORGANIC frameworks MWCNTs/Graphene Nanocomposites SPILLOVER HYDROGEN economy
在线阅读 下载PDF
阻塞比对氢-空预混火焰加速影响的可视化研究 预览
14
作者 刘福水 李率毅 +2 位作者 张小玉 黎一锴 吴晗 《内燃机工程》 EI CAS CSCD 北大核心 2019年第3期1-9,共9页
在顶置点火定容燃烧弹内布置网孔板,通过火焰传播路径上的孔板诱导实现火焰加速。利用纹影法和压力采集系统,研究了阻塞比对氢-空预混气孔板诱导火焰加速的影响规律。试验结果表明:阻塞比的增加可增大孔板对火焰的扰动,使火焰传播速度... 在顶置点火定容燃烧弹内布置网孔板,通过火焰传播路径上的孔板诱导实现火焰加速。利用纹影法和压力采集系统,研究了阻塞比对氢-空预混气孔板诱导火焰加速的影响规律。试验结果表明:阻塞比的增加可增大孔板对火焰的扰动,使火焰传播速度大幅增加;任意初始工况下均存在一个最佳阻塞比使燃烧持续期达到最短,在试验范围内,较低初始压力、较小当量比和较高初始温度的最佳阻塞比为0. 90,其余工况的最佳阻塞比均在0. 84;孔板诱导燃烧加速的效果非常显著,在试验工况范围内,各阻塞比孔板诱导下的燃烧持续期均缩短45%以上。 展开更多
关键词 阻塞比 定容燃烧弹 诱导湍流 燃烧特性 氢气
在线阅读 下载PDF
氢对脓毒症相关性脑病小鼠脑组织基质金属蛋白酶-9表达的影响
15
作者 蒋毅 于洋 +4 位作者 王瑶琪 杨曼 秦超 谢克亮 于泳浩 《中华麻醉学杂志》 CAS CSCD 北大核心 2019年第5期606-609,共4页
目的评价氢对脓毒症相关性脑病小鼠脑组织基质金属蛋白酶-9(MMP-9)表达的影响。方法清洁级健康雄性C57BL/6J小鼠212只,6~8周龄,体重20~25 g,采用随机数字表法分为4组(n=53):假手术组(Sham组)、假手术+氢气组(Sham+H2组)、脓毒症相关性... 目的评价氢对脓毒症相关性脑病小鼠脑组织基质金属蛋白酶-9(MMP-9)表达的影响。方法清洁级健康雄性C57BL/6J小鼠212只,6~8周龄,体重20~25 g,采用随机数字表法分为4组(n=53):假手术组(Sham组)、假手术+氢气组(Sham+H2组)、脓毒症相关性脑病组(SAE组)和脓毒症相关性脑病+氢气组(SAE+H2组)。采用腹腔注射人粪便悬浊液法制备脓毒症相关性脑病模型。Sham+H2组及SAE+H2组分别于模型制备后1、6 h时吸入2%氢气1 h。记录术后14 d生存情况;于模型制备后24 h时,尾静脉注射伊文氏蓝(EB),计算脑组织EB含量;取脑组织,测定水含量;采用ELISA法测定海马TNF-α、IL-6和高迁移率族蛋白B1(HMGB1)含量。于模型制备后6、12和24 h时,分别采用Western blot法和RT-PCR法测定海马MMP-9和ZO-1及其mRNA的表达水平。结果与Sham组比较,SAE组和SAE+H2组14 d生存率降低,脑组织EB含量、水含量、海马TNF-α、IL-6和HMGB1含量升高,海马MMP-9及其mRNA表达上调,ZO-1及其mRNA表达下调(P<0.05),Sham+H2组上述指标差异无统计学意义(P>0.05);与SAE组比较,SAE+H2组14 d生存率升高,脑组织EB含量、水含量、海马TNF-α、IL-6和HMGB1含量降低,海马MMP-9及其mRNA表达下调,ZO-1及其mRNA表达上调(P<0.05)。结论氢减轻脓毒症相关性脑病小鼠血脑屏障损伤的机制可能与抑制脑组织MMP-9表达,减轻炎症反应有关。 展开更多
关键词 脓毒症 血脑屏障 基质金属蛋白酶9
基于能源战略规划的日本能源转型研究
16
作者 张慧智 张健 《现代日本经济》 CSSCI 北大核心 2019年第3期14-23,共10页
2018年7月,日本发布第五次《能源战略规划》,首次明确提出了'2050年实现能源转型和脱碳化'的战略目标,结合以往4次《能源战略规划》,会发现能源转型一直是日本能源战略和政策的方向。2011年以前,日本将核能作为推进能源转型的... 2018年7月,日本发布第五次《能源战略规划》,首次明确提出了'2050年实现能源转型和脱碳化'的战略目标,结合以往4次《能源战略规划》,会发现能源转型一直是日本能源战略和政策的方向。2011年以前,日本将核能作为推进能源转型的主力能源,2011年核事故之后,日本在《能源战略规划》中强调,要通过多渠道推进能源转型。日本推动能源转型的主要渠道包括提升化石能源使用效率,增加水能、核能、风能、太阳能等新能源的开发和利用,促进能源节约,加强分布式能源系统建设和氢社会建设等,日本在这些渠道上采取了诸多措施,取得了大量成果。但是,日本当前面临的技术水平限制、民众对核能不信任、相关利益主体掣肘等挑战使得日本能源转型之路充满了不确定性。 展开更多
关键词 日本能源战略 能源转型 能源政策 能源技术 氢能源
Two-dimensional Sn2Ta2O7 nanosheets as efficient visible lightdriven photocatalysts for hydrogen evolution
17
作者 Xiao-Shuai Wang Chao Zhou +2 位作者 Run Shi Qin-Qin Liu Tie-Rui Zhang 《稀有金属:英文版》 SCIE EI CAS CSCD 2019年第5期397-403,共7页
Two-dimensional Sn2Ta2O7 nanosheets with a thickness of~10 nm were successfully prepared through a novel tantalic acid-based solid-state reaction method at reduced temperature.The as-obtained samples were characterize... Two-dimensional Sn2Ta2O7 nanosheets with a thickness of~10 nm were successfully prepared through a novel tantalic acid-based solid-state reaction method at reduced temperature.The as-obtained samples were characterized by powder X-ray diffraction(XRD),ultraviolet–visible(UV–Vis)diffuse reflectance spectra,scanning electron microscopy(SEM),transmission electron microscopy(TEM)and Brunauer–Emmett–Teller(BET)analysis.The photocatalytic performance of Sn2 Ta2 O7 nanosheets was evaluated by photocatalytic water splitting for hydrogen evolution under visible light irradiation(k C 400 nm).The Sn2Ta2O7 nanosheets with a large surface area of 25.9 m^2·g^-1 showed higher H2 production activity,which was about 4.4 times higher than that of bulk Sn2 Ta2O7 in lactic acid aqueous solutions using Pt as a cocatalyst.The improved photocatalytic performance mainly benefited from the nanosheet structure,which provided abundant surface active sites and facilitated the photogenerated charge carrier separation efficiently.This workmay open up new opportunity to develop novel nanostructured tantalum-based semiconductors with improved catalytic performance for solar energy conversion. 展开更多
关键词 Sn2Ta2O7 NANOSHEETS VISIBLE light PHOTOCATALYSIS HYDROGEN evolution
An electrodeposition approach to metal/metal oxide heterostructures for active hydrogen evolution catalysts in near-neutral electrolytes
18
作者 Michael J.Kenney Jianan Erick Huang +9 位作者 Yong Zhu Yongtao Meng Mingquan Xu Guanzhou Zhu Wei-Hsuan Hung Yun Kuang Mengchang Lin Xiaoming Sun Wu Zhou Hongjie Dai 《纳米研究:英文版》 SCIE EI CAS CSCD 2019年第6期1431-1435,共5页
Neutral water splitting is attractive for its use of non-corrosive and environmentally friendly electrolytes.However,catalyst development for hydrogen and oxygen evolution remains a challenge under neutral conditions.... Neutral water splitting is attractive for its use of non-corrosive and environmentally friendly electrolytes.However,catalyst development for hydrogen and oxygen evolution remains a challenge under neutral conditions.Here we report a simple electrodeposition and reductive annealing procedure to produce a highly active Ni-Co-Cr metal/metal oxide heterostructured catalyst directly on Ni foam.The resulting electrocatalyst for hydrogen evolution reaction (HER) requires only 198 mV of overpotential to reach 100 mNcm2 in 1 M potassium phosphate (pH =7.4) and can operate for at least two days without significant performance decay.Scanning transmission electron microscopy coupled with electron energy loss spectroscopy (STEM-EELS) imaging reveals a Ni-Co alloy core decorated with blended oxides layers of NiO,CoO and Cr2O3.The metal/metal oxide interfaces are suggested to be responsible for the high HER activity. 展开更多
关键词 water SPLITTING CATALYSIS NANOSTRUCTURED materials hydrogen EVOLUTION chemical mapping
Synthesis of TiO2@ZnIn2S4 hollow nanospheres with enhanced photocatalytic hydrogen evolution
19
作者 He Li Zi-Hao Chen +1 位作者 Lei Zhao Gui-Dong Yang 《稀有金属:英文版》 SCIE EI CAS CSCD 2019年第5期420-427,共8页
In this work,we designed and prepared the novel TiO2@ZnIn2 S4 nano-sized hollow structure via templating method assisted by hydrothermal synthesis process.Its unique hollow structure and type-II heterojunction between... In this work,we designed and prepared the novel TiO2@ZnIn2 S4 nano-sized hollow structure via templating method assisted by hydrothermal synthesis process.Its unique hollow structure and type-II heterojunction between TiO2 hollow nanospheres and ZnIn2 S4 nanosheet can provide enough interior cavities and transfer paths for the light absorption and charge quick migration.The crystal structure,morphology and charges separation property were measured.The characterization results show that the hollow-structured Ti O2@ZnIn2 S4 was successfully prepared,and the optimal sample exhibited excellent photocatalytic hydrogen generation compared with TiO2/ZnIn2 S4 cluster exceeding by a factor of 1.1 under overall light irradiation.Specially,the detailed mechanism of the photocatalytic H2 evolution and charge carrier migration for the as-prepared TiO2@ZnIn2 S4 hollow nanosphere was also studied. 展开更多
关键词 TIO2 ZnIn2S4 PHOTOCATALYSIS HYDROGEN EVOLUTION HOLLOW
氢气对慢性阻塞性肺疾病保护机制的研究进展 预览
20
作者 郝立姣 李靖 +3 位作者 张志华 王润钰 赵一茹(综述) 赵卉(审校) 《临床与病理杂志》 2019年第9期2047-2051,共5页
慢性阻塞性肺疾病是全球范围内的公共卫生挑战,同时也是慢性病患病和病死的主要死亡原因。目前的治疗原则主要为戒烟及以支气管扩张剂为主的药物治疗,肺康复治疗亦可改善症状和生活质量,但总体疗效并不理想。氢气治疗作为一种新的医学... 慢性阻塞性肺疾病是全球范围内的公共卫生挑战,同时也是慢性病患病和病死的主要死亡原因。目前的治疗原则主要为戒烟及以支气管扩张剂为主的药物治疗,肺康复治疗亦可改善症状和生活质量,但总体疗效并不理想。氢气治疗作为一种新的医学干预方法,受到越来越多的关注,近几年已开始应用于呼吸系统疾病。 展开更多
关键词 慢性阻塞性肺疾病 氢气 抗炎 抗氧化 抗凋亡
在线阅读 下载PDF
上一页 1 2 250 下一页 到第
使用帮助 返回顶部 意见反馈