Results 1 to 10 of about 2,292 (53)
Zhejiang Daxue xuebao. Lixue ban, 2013 着重研究了固定床催化条件下对二甲苯与γ-丁内酯连续流动反应的催化活性和选择性.在对几类不同固体酸催化剂考评的基础上，选择H-Beta分子筛为催化剂并考察了反应温度、氮气流量、液体进样量、催化剂的焙烧温度等因素对反应的影响以及催化剂的再生稳定性和导致催化剂失活的主要因素.实验结果表明，H-Beta分子筛对此反应有较高的催化活性和选择性，与γ-丁内酯有关的副反应可能是导致催化剂失活的主要因素，但是失活后的催化剂可直接在固定床中通入空气灼烧反复活化再生，避免了以往液体酸催化中催化剂的一次性使用问题 ...
BIANNi-ni(卞妮妮) +4 more
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Gongye shui chuli, 2022 为了解决臭氧催化剂效率低、易流失等问题，采用焙烧法制备FeOx-CuOx-MnOx/活性炭-蒙脱土臭氧催化剂。通过扫描电子显微镜（SEM）、X射线能谱分析（EDS）等方法对所制备臭氧催化剂进行表征，并将该催化剂应用于臭氧催化氧化深度处理垃圾渗滤液实验。分别考察了臭氧催化剂载体中粉末活性炭与蒙脱土质量比、活性组分Fe2+、Cu2+、Mn2+物质的量比、载体与活性组分的质量比、焙烧温度与时间等因素对催化剂性能的影响。结果表明，当载体组分中粉末活性炭与蒙脱土质量比为1∶1，活性组分Fe2+、Cu2+、Mn2 ...
李振邦, 张欢, 王全勇, 彭锦玉
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Gongye shui chuli, 2015 以Bi2O3 和MnCl2·4H2O为原料,利用水解法合成了Mn/BiOCl催化剂。用XRD、HRTEM等对其进行了表征。以苯酚作为光催化反应模型化合物,考察了Mn/BiOCl催化剂的紫外光催化活性。并评价了清除剂对催化剂紫外光催化活性的影响。结果表明:Mn的含量对Mn/BiOCl催化剂的光催化活性有很大影响。当n(Mn):n(Bi)为1:100时,所合成的Mn/BiOCl催化剂光催化活性最高,苯酚的光催化降解率达到70.3%。
崔玉民 +4 more
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Gongye shui chuli, 2016 利用CeO2的储氧和释氧能力，以高活性的活性炭作为催化剂载体，采用等体积浸渍法制备CeO2-活性炭催化剂。分别用氮气低温吸附/脱附、XRD、XPS对CeO2-活性炭催化剂进行表征。以CeO2-活性炭作为催化剂，草酸作为模型化合物，催化臭氧化降解草酸的去除率达到77%。Ce组分的加入能显著提高草酸的去除率。Ce不仅能够提高反应体系中羟基自由基的浓度，还有利于O3分子直接氧化草酸。CeO2-活性炭催化剂经过3次重复使用后，草酸去除率保持在70%以上，具有较好的稳定性。
杨郭 +4 more
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Rare Metals, Volume 45, Issue 11, November 2026.ABSTRACT Fe‐N‐C electrocatalysts are considered promising alternatives to platinum‐based catalysts for advancing the development of metal–air batteries. However, the simultaneous realization of scalable synthesis, hierarchical mass‐transfer pathways, and precise regulation of Fe‐N4 sites remains challenging. Different from conventional Fe‐N‐C synthesis,
Bingye Song +7 more
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GHK‐Cu Delays Aging Through the Repair of Mitochondrial Dysfunction
Rare Metals, Volume 45, Issue 11, November 2026.ABSTRACT Althugh glycyl‐L‐histidyl‐L‐lysine copper (GHK‐Cu) shows antiaging potential, its precise molecular mechanisms remain unclear. Using Caenorhabditis elegans (C. elegans) as an in vivo aging model, we observed that GHK‐Cu extended organismal lifespan and improved stress resilience.
Haoquan Yu +8 more
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Rare Metals, Volume 45, Issue 11, November 2026.ABSTRACT MoS2 is considered a promising electrocatalyst for the hydrogen evolution reaction (HER) because of its low cost and excellent stability. However, its practical application is severely limited by the scarcity of edge active sites and poor intrinsic electrical conductivity.
Ting Wang +6 more
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Gongye shui chuli, 2002 提高光催化剂的光催化活性,以及将光催化剂固定于合适的载体表面,这是多相光催化技术工业处理应用中的关键。单一半导体光催化剂的光催化活性普遍不高,通过改性可以提高光催化活性,甚至在提高活性的同时扩展光谱响应范围,提高光的利用率。而将光催化剂固定在合适的载体表面,可免去光催化剂的分离回收工序,以及消除粉末悬浮体系中存在的易聚集、流失等缺点。
张素香, 屈撑囤, 王新强
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Rare Metals, Volume 45, Issue 11, November 2026.ABSTRACT Electrocatalytic CO2 reduction reaction (CO2RR) represents a pivotal pathway for the promotion of carbon neutrality and the preparation of highly valuable chemicals. To improve the product selectivity and catalytic efficiency of CO2RR, single‐atom catalysts (SACs) offering highly efficient atomic utilization rates and adjustable electronic ...
Xiaorui Liu +7 more
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Rare Metals, Volume 45, Issue 11, November 2026.ABSTRACT Vanadium redox flow batteries show considerable promise for energy storage, yet their overall performance is still hindered by the limited electrochemical activity of graphite felt (GF) electrodes. Herein, using folic acid and metal salts as precursors, M–N–C functionalized carbon nanosheets (M–NC, M=Co, Fe, and Ni) were prepared via a ...
Long Jiang +7 more
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