Results 11 to 20 of about 1,555,927 (98)
, 2005 采用添加表面活性剂两步沉淀法制备了具有高表面铜相对浓度的超细甲醇合成催化剂：以组成为H2／CO／CO2／N2=66／27／3／4（体积比）的原料气对催化剂进行了活性评价。结果表明，该催化剂比传统并流沉淀法制备的铜基催化剂活性提高47．9％．比两步沉淀法和添加表面活性剂并流沉淀法制备的铜基催化剂活性分别提高9．3％和16．8％。利用SEM、XRD及XPS方法对催化剂的结构 ...
王铁军 +4 more
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Rare Metals, Volume 45, Issue 11, November 2026.ABSTRACT Solid oxide electrolysis cell (SOEC) technology is a promising route for efficient and clean green hydrogen production because of its high conversion efficiency and the use of precious‐metal‐free catalysts. However, developing oxygen electrodes that combine high electrochemical activity with robust long‐term operational stability remains ...
Yue Zhao +8 more
wiley +1 more source
Shuitu Baochi Xuebao, 2011 在我国南方红壤中加入不同的磷活化剂进行培养试验,结果显示:磷活化剂提高了土壤有效磷含量,不同活化剂的活化能力不同。相关分析和通径分析结果表明,磷活化剂的活化能力大小顺序为:低分子有机酸钠钙盐>腐植酸>腐植酸钠>脲基甲酸乙酯;磷活化剂可以提高红壤中的Al-P、Ca-P和Fe-P等无机磷含量,其中Al-P和Ca-P与有效磷均达到极显著水平,而Fe-P作用效果不显著,可以通过影响Al-P和Ca-P来间接影响有效磷,磷活化剂会抑制土壤中O-P的生成。
李杰 +4 more
doaj
Rare Metals, Volume 45, Issue 11, November 2026.ABSTRACT Capacitive deionization (CDI) using activated carbon (AC) electrodes holds great promise for seawater desalination, yet its practical application is severely constrained by the intrinsic hydrophobicity of carbon surfaces. Herein, we propose a solid‐state superhydrophilic modulation strategy that physically wet‐mixes superhydrophilic MOF ...
Ruiting Ni +4 more
wiley +1 more source
Rare Metals, Volume 45, Issue 11, November 2026.ABSTRACT The lack of diverse active sites in single‐component catalysts inevitably leads to a competitive adsorption dilemma between 5‐hydroxymethylfurfural (HMF) and OH−, impeding the kinetics of electrocatalytic oxidation of HMF (EC‐HMFOR). Herein, we deliver an interfacial engineering strategy by constructing a rare‐earth metal oxide heterostructure
Ruijia Cao +4 more
wiley +1 more source
Gongye shui chuli, 2016 以光合竹为原料,研究了其制备活性炭的工艺条件,考察了活化剂浓度、固液比、活化时间以及活化温度等因素对活性炭碘吸附值、亚甲基蓝吸附值的影响。实验结果表明,用化学法制备光合竹活性炭的最佳工艺参数为:以ZnCl2为活化剂,ZnCl2浓度为5 mol/L,活化剂浸渍时间为2 h,固液比为1:4,活化时间为60 min,活化温度为500 ℃。在此工艺条件下所制备活性炭得率为48.8%,亚甲基蓝吸附值为197.14 mg/g,碘吸附值为1 034.30 mg/g,样品质量指标接近净化用活性炭标准。
赵巍, 谷晋川, 樊志金, 尹敏
doaj +2 more sources
Shuitu Baochi Xuebao, 2019 为有效提高植物提取污染土壤重金属的效率，以绿色安全的有机物料为活化剂代替存在安全隐患、不可降解的螯合剂及表面活性剂，探究不同活化剂对土壤重金属镉的活化效果及对植物镉积累的影响。通过室内培养试验与盆栽试验的方法，研究了紫云英、黄腐酸钾和柠檬酸3种活化剂在0.3%施用量下对污染土壤中镉的生物有效性、赋存形态的影响及活化剂强化柳树对镉的积累。结果表明：（1）添加活化剂会改变土壤的pH。培养结束时，黄腐酸钾处理对土壤pH的降低效果优于紫云英处理，显著低于对照0.50个单位 ...
倪幸, 李雅倩, 白珊, 叶正钱
doaj
Interactions between dye Orange Ⅱ and three cationic surfactants(染料橙黄Ⅱ与三个阳离子表面活性剂的相互作用)
Zhejiang Daxue xuebao. Lixue ban, 2007 测定了阴离子染料橙黄Ⅱ与十六烷基三甲基溴化铵、十六烷基-羟乙基二甲基溴化铵和十六烷基-二羟乙基-甲基溴化铵等3个具有不同头基的季胺盐型阳离子表面活性剂水溶液的紫外-可见吸收光谱，研究了橙黄Ⅱ与表面活性刑之间的相互作用.在不同浓度的染料-表面活性剂水溶液中，染料的吸收光谱强度发生明显变化，含表面法性剂的染料溶液的吸收强度比其水溶液要小，说明染料橙黄Ⅱ与季铵盐表面活性剂之间发生较强的相互作用.由光谱数据计算了表面活性剂的临界胶東浓度和染料-表面活性剂相互作用常数等重要物理参数 ...
XULi-qun(徐莉群) +3 more
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Rare Metals, Volume 45, Issue 11, November 2026.ABSTRACT Electrocatalytic C–N coupling technology provides a new approach for green acetamide synthesis, which is achieved via direct reduction of carbon monoxide (CO) and ammonia (NH3). However, efficient, stable catalysts urgently need to be developed, and their reaction mechanisms elucidated.
Haonan Li +6 more
wiley +1 more source
Rare Metals, Volume 45, Issue 11, November 2026.ABSTRACT Sb2S3 is regarded as a promising anode for sodium‐ion batteries (SIBs) because of its high theoretical capacity and moderate working potential. However, it suffers from huge volume changes, poor conductivity, and excessive side reactions, leading to severe capacity decay and a low initial Coulombic efficiency (ICE), thus limiting its practical
Jia‐Hao Zhao +6 more
wiley +1 more source