Results 31 to 40 of about 1,001,422 (167)
Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT Multicomponent transition metal oxides (TMOs) incorporating rare‐earth (RE) elements have emerged as promising materials for the oxygen evolution reaction (OER). However, knowledge of how to regulate the structure of TMO‐based nanomaterials through RE incorporation to enhance catalytic performance remains limited.
Bolin Zhao +6 more
wiley +1 more source
四川大学学报. 自然科学版, 2008 以石油焦为原料,浓硫酸为磺化剂,通过磺化反应制得了磺化石油焦新型酸催化剂.在乙酸乙酯的合成反应中考察了该催化剂的催化活性.结果表明:在优化条件下(反应温度90℃,反应时间2.5 h,催化剂0.5 g,乙酸0.15 mol,醇酸摩尔比1.5∶1,环己烷10 mL),酯化率可达96.2%.与K2641强酸性阳离子交换树脂相比,磺化石油焦酸催化剂表现出较高的催化活性,循环使用5次后,催化剂活性基本保持不变.
李峰峰 +5 more
doaj
Gongye shui chuli, 2023 利用废弃小麦秸秆为原料，通过离子液体法制备了小麦秸秆纤维素基水凝胶（SCH），合成了磁性秸秆纤维素基水凝胶负载Fe3O4（SCH@Fe3O4）催化剂。将SCH@Fe3O4催化剂经原位固定铜离子和化学还原法合成了原位负载的SCH @Fe3O4/Cu催化剂，并研究了该催化剂活化NaBH4催化还原硝基苯甲酸（NA）的性能。同时，优化了催化剂投加量、NaBH4投加量、NA初始浓度和反应温度对NA催化还原效果的影响。SCH@Fe3O4/Cu催化剂活化NaBH4还原NA的性能优于商品纳米零价铁 ...
李增强
doaj
Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT With the growing severity of volatile organic compounds (VOCs) pollution, metal‐organic frameworks (MOFs)‐derived materials offer a promising solution through efficient photothermal catalysis. In this paper, M‐MnOx (M = Cu, Ni, Co, Fe) catalysts derived from manganese‐based MOFs were successfully prepared by the sacrificial template method and
Yizhong Liao +10 more
wiley +1 more source
, 1990 非贵金属蜂窝陶瓷催化剂，用于汽车排气净化。蜂窝陶瓷涂有双层孔结构，改性的Ａｌ2Ｏ3作为催化剂的载体，催化剂的活性是铁的氧化物及由钴、镍、锰、铜，铬元素的氧化物和稀土铈或含有铈元素＞３５％的混和稀土元素的氧化物，本发明催化剂其耐热稳定性好，氧化铝涂层不易脱落，即使在较高温的使用条件下催化剂也具有较长的寿命 ...
李北芦, 李时瑶
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Zhejiang Daxue xuebao. Lixue ban, 2017 利用无机原料水热合成法制备BiOI/BiOBr复合可见光催化剂，通过XRD、SEM、EDS、DRS、I-t响应曲线等手段对催化剂的物相组成和光化学性能进行了系统表征.以RhB为目标污染物，考察了催化剂的光催化活性并对最优比例催化剂的稳定性进行评价，通过ESR分析和自由基捕获实验探究了RhB的光催化降解机制.研究结果表明：无机原料水热合成法可成功制备纯度高、结晶性能良好的BiOI/BiOBr复合可见光催化剂；BiOI的复合降低了BiOBr光催化剂的电子-空穴的复合，拓宽其可见光响应范围 ...
ZHANGQun(张群) +6 more
doaj +1 more source
Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT Efficient catalytic materials are vital for addressing the polysulfide shuttle and sluggish redox kinetics in lithium–sulfur batteries. Herein, we report a facile sugar‐blowing method to prepare porous carbon‐supported FeCoNiCuPt high‐entropy alloy (HEA) nanospheres with abundant lattice defects in a single crystalline phase.
Guixiang Zhong +8 more
wiley +1 more source
, 2001 一种脱砷催化剂，其特征在于：以炭作催化剂载体；催化剂的活性组份包括：Fe、Co、Ni等元素周期表中的第Ⅷ族元素之一种或多种；Cr、Mo、W、Mn、Ti等过渡金属元素之一种或多种；Li、Na、K、Mg、Ca等碱金属或碱土金属元素之一种或多种；La、Ce等稀土元素之一种或多种。本发明催化剂可以解决乙烯原料油的脱砷问题，其具有高的机械强度，较长的使用寿命，较大的砷容量 ...
周焕文, 高进, 徐杰
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Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT Layered double hydroxides (LDHs) are attractive non‐noble catalysts for overall water splitting (OWS), yet their hydrogen evolution reaction (HER) activity is often limited by suboptimal *H adsorption and a paucity of accessible sites. Herein, we introduce an oxygen‐vacancy (Ov) engineering strategy to construct ultrathin Ni‐Fe LDH nanosheets ...
Qi Liu +8 more
wiley +1 more source
, 1991 一种用于工业废气，特别是硝酸厂尾气中氮氧化物净化的催化剂以分子筛和Ａｌ2Ｏ3混合物作为载体、铁、铜、钒和／或微量铂元素为活性组分，使用这种催化剂在３０，０００－８０，０００时-1空速下，２２０－２５０℃范围内ＮＨ3／ＮＯx为０．９－１．２时可高效净化ＮＯx（含２０００－１０００ｐｐｍＮＯx气体可净化到２００ｐｐｍ以下），该催化剂含有金属铂后可使反应温度降至２００℃左右，且ＮＯx转化率可以９８％，此外催化剂无毒，氨耗低、寿命长 ...
李北芦, 吴春田, 李时瑶
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