Results 31 to 40 of about 1,257,855 (161)
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
doaj +1 more source
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT Pyritum can eliminate blood stasis and promote the healing of muscles and bones, which has been used as a traditional mineral medicine in China for thousands of years. However, the mechanisms of action and processing methods of Pyritum were not illustrated.
Mingxia Li +8 more
wiley +1 more source
Zhejiang Daxue xuebao. Lixue ban, 2023 挥发性有机废气（volatile organic compounds，VOCs）的大量排放对环境造成了严重危害，催化燃烧是去除VOCs的有效方法之一。使用简单且环保的催化剂制备方法一直是催化燃烧中催化剂研究的重点与难点之一。以CeO2，Al2O3，La2O3和ZrO2等氧化物以及相应的氢氧化物为载体前驱体，采用球磨法制备了一系列负载型Cu基催化剂，比较了不同氧化物和相应氢氧化物载体前驱体对乙酸乙酯（ethyl acetate，EA）催化燃烧性能的影响，并用XRD、TEM、XPS和H2 ...
陈韩(CHEN Han) +8 more
doaj +1 more source
VO2 Hollow Nano‐Reactor: Enabling Near‐Room‐Temperature and Ultrafast Hydrogen Release From α‐AlH3
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT α‐phase aluminum trihydride (α‐AlH3) is a promising high‐capacity hydrogen storage material, but its practical application is limited by slow dehydrogenation kinetics and high reaction temperatures. This study demonstrates, for the first time, effective modulation of the hydrogen release kinetics of AlH3 by employing a hollow nanostructured ...
Haoyuan Zheng +8 more
wiley +1 more source
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT Photocatalysis has emerged as a promising approach for solar energy conversion and environmental remediation. However, its practical implementation is still hindered by limited charge‐separation efficiency, slow surface reaction kinetics, and insufficient catalyst stability.
Mengting Zhang +5 more
wiley +1 more source
, 2007 制备了一系列不同投料比例（Mo／P）摩尔比为0．6～2．6）的磷化钼催化剂，研究了催化剂对乙腈选择加氢反应的催化性能．结果表明，在初始Mo／P〉1．0时，催化剂表现出很高的乙胺选择性，达到80％～90％；Mo／P〈1．0时，对二乙胺和三乙胺有很好的选择性，二者之和达到90％左右；而在Mo／P=1．0时 ...
杨鹏飞, 蒋宗轩, 李灿, 应品良
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Enhanced Oxygen Reduction Reaction Performance of Fe‐N4 Single‐Atom Catalysts Through Fe3C Coupling
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT Understanding the electronic factors contributing to the high oxygen reduction reaction (ORR) activity of Fe‐N4 sites remains a significant challenge due to the localized Fe 3d orbitals and their sensitivity to the coordination environment.
Shichang Cai +19 more
wiley +1 more source
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT The development of high‐performance and cost‐effective oxygen evolution reaction (OER) electrocatalysts is critical for the large‐scale deployment of green hydrogen technologies. Among various candidates, amorphous alloys have emerged as promising OER catalysts owing to their long‐range disordered atomic structures, high energy states, and ...
Bo Li +10 more
wiley +1 more source
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT Magnesium hydride (MgH2) is a promising solid‐state hydrogen storage material due to its high gravimetric capacity and excellent reversibility. However, its practical application is hindered by high thermodynamic stability and sluggish reaction kinetics.
Xingyang Chen +6 more
wiley +1 more source
, 2021 原油直接裂解制化学品是石化行业的发展趋势，分子筛催化剂在该过程中起着重要作用。成型是制备工业用分子筛催化剂的必须环节，与催化剂机械强度、流化性能、粒径分布等性质密切相关。综述分子筛催化剂成型过程中的关键因素，包括成型添加剂种类、含量以及喷雾干燥条件对催化剂物化性质的影响规律，并对分子筛喷雾干燥成型过程的发展趋势进行展望 ...
张国霞 +4 more
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