Results 51 to 60 of about 4,736 (178)
First principles investigation of MoS2-based van der Waals heterostructures as photocatalysts [PDF]
, 2015 近年来，利用太阳能的半导体光催化技术制备氢气在科学和工业领域得到了广泛关注。二维材料二硫化钼（MoS2）因具有优异的电子性能、光学性能、机械性能及热学性能，在光催化制氢领域具有很好的应用前景。然而，二硫化钼需要共催化剂才能实现在太阳光下光催化水分解制备氢气，而构建二硫化钼基异质结是提供共催化的有效方法，可以有效地提高光催化效率，对光催化材料领域的研究有重要意义。 本文采用基于密度泛函理论的第一性原理方法，对MoS2基范德华异质结的晶体结构、电子结构、光催化性能等展开了系统的研究。论文主要内容如下： （一）
廖加敏
core
Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT Formic acid (FA) is considered to be a safe and convenient hydrogen source; however, achieving controlled and efficient FA dehydrogenation under mild conditions using stable solid catalysts remains a significant challenge. Pd‐based catalysts have been extensively studied due to their superior catalytic activity to other metal catalysts.
Shuai Wei +10 more
wiley +1 more source
Short-chain alcohol hydrogen donor for the hydrodeoxygenation of vanillin(低碳醇用于香兰素加氢脱氧催化反应的研究)
Zhejiang Daxue xuebao. Lixue ban, 2016 在一系列Mo2C/AC催化剂上，研究了短链低碳醇作为氢供体在香兰素加氢脱氧催化反应中的作用.实验表明，在香兰素的加氢脱氧催化反应过程中，乙醇不仅作为溶剂，同时也是较理想的氢供体.20% Mo2C/AC催化剂具有最佳的催化性能，在200 ℃温度下，香兰素的转化率达28. 2%，4-甲基愈创木酚的选择性高达94. 2%，其加氢脱氧活性主要与催化剂中高分散的β-Mo2C纳米粒子有关.
WANGFenglian(王枫濂) +2 more
doaj +1 more source
Investigation on the optimal theories of thermionic and thermoelectric devices and their hybrid systems [PDF]
, 2016 能源短缺和环境污染问题的日益突出使太阳能、氢能等新能源的研究得到广泛关注。提高能源的利用率是解决这些问题的有效途径之一。因此，对材料性能、器件功能、系统设计的深入研究已成为当前各相关领域的热点课题。本论文主要研究热离子器件、热电器件和燃料电池等固态能量转换器件及其耦合系统的性能，探索降低内外不可逆损失的可能途径，建立相应的优化理论，提供性能参数的优化设计准则。研究内容主要分为三个部分。 第一部分包括第二至第四章，主要研究真空热离子发电器及其耦合系统中的内外不可逆损失对性能的影响 ...
王远
core
Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT The development of novel oxygen electrocatalysts with cost‐effectiveness, scalability, high catalytic activity, and stability presents a significant challenge for zinc–air batteries (ZABs). The nitrogen‐rich lignin coordination network structure is synthesized through amine modification of lignin.
Ping‐Xian Feng +8 more
wiley +1 more source
Controllable Fabrication, Growth Mechanism Investigation and Applications of TiO2 Nanostructures on Si or FTO Substrates [PDF]
, 2015 中文摘要 材料的发展影响着人类社会的进程，每一种材料的出现都有可能影响到时代的变革，而每个时期人们对生活的不同需求又会激励新型材料的不断发展。如今能源短缺、环境污染越来越严重，促使人们对新型无污染的产能材料和储能材料等有了更多的需求。 二氧化钛，一种无毒无污染的材料，具有优越的物理和化学性能，在化妆品、涂料、光伏、光转换和储能方面有着广泛应用。它是一种宽禁带(金红石型3.0eV，锐钛矿型3.2eV)半导体材料，由于化学稳定性良好，已经被用作光水解制氢反应中的光阳极材料。另外 ...
钟媛
core
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Cost‐effective and efficient non‐noble‐metal catalysts for selective lignin hydrogenolysis remain elusive, representing a significant challenge in biorefinery. Here, we prepared a nitrogen‐doped carbon supported CoNi bimetallic catalyst, which was successfully derived from zeolitic imidazolate framework (ZIF) via high‐temperature pyrolysis ...
Xingwei Luo +3 more
wiley +1 more source
Fabrication of Micro Direct Formic Acid Fuel Cell Based on MEMS Technology [PDF]
, 2015 微型直接甲酸燃料电池（MicroDirectFormicAcidFuelCell，μ-DFAFC）具有能量转化效率高、膜渗透率低、电催化氧化活性高、补给方便和环境友好等优点，同时其具备的实际能量密度高、室温工作性能优良、燃料储存携带便捷且安全无毒害等优势，使其逐步成为目前微型燃料电池研究和便携式电源领域的热门方向。基于上述优势，本论文采用MEMS（Micro-Electro-MechanicalSystem）技术设计并制备了一款封装性能优良的μ-DFAFC ...
王婷婷
core
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Low conductivity, slow ion‐diffusion, and limited reactive sites are common problems in electrocatalysts and electrode materials. In this study, a complex NiTe–CoTe heterojunction with abundant Te vacancies embedded in N, P, and F co‐doped hollow carbon nanorods (NiTe1−x–CoTe1−x/NPFC) was fabricated via a simple ionic liquid‐assisted ...
Mingjie Yi +7 more
wiley +1 more source
Multivariate Analysis of Reactive Oxygen Species Metabolism of Strawberry Treated with Gas Impingement(气体冲击处理对草莓活性氧代谢影响的多变量解析) [PDF]
Shipin kexue jishu xuebao, 2015 The effects of individual treatments with gas impingement on fruit quality and reactive oxygen species metabolism of strawberries were analyzed by one-way analysis of variance, principal component analysis (PCA), partial least squares regression (PLSR ...
LI Liping(李丽萍) +4 more
doaj +1 more source