Results 31 to 40 of about 2,451 (200)
Effects of Disturbance Modes on Vegetation and Soil in Typical Grassland Area [PDF]
, 2023 [Objective] The effect of different disturbance modes on soil physical and chemical properties and vegetation characteristics of typical grassland areas in Inner Mongolia were analyzed in order to provide a scientific basis for restoring the ecological ...
Cha Na +6 more
core +1 more source
Coastal reclamation impacts on carbon storage in China’s coastal wetland [PDF]
, 2017 滨海湿地具有较高的初级生产力和较缓慢的有机质降解速率，是缓解全球变暖的有效碳汇，得到全球学术界的广泛关注。近年来由于人口增长和沿海城市的快速发展，海岸带地区围填海活动呈加剧趋势，导致滨海湿地的急剧退化。开展围填海活动对滨海湿地碳储量造成影响的研究，对我国海岸带围填海活动的优化管理、制定滨海湿地保护行动计划以及减缓气候变化的战略决策具有非常重要的学术价值和现实意义。 本论文以全国围填海区内的滨海湿地作为研究对象，基于全国围填海土地利用分类数据、滨海湿地和沿海自然保护区空间分布数据以及文献检索碳密度数据 ...
邱建慧
core
Zhongguo youzhi, 2023 为进一步推动虫害绿色防护技术发展，促进仓储工作高质量发展，针对浅圆仓采取下充上排式的二氧化碳气调工艺，通过考察试验仓内不同位置二氧化碳浓度变化情况、大豆品质指标变化情况和储粮害虫防治效果，研究二氧化碳气调技术对浅圆仓大豆储藏效果的影响，并与氮气气调技术进行了对比。结果表明：各检测点二氧化碳浓度维持35%以上的时间超过15 d；对锈赤扁谷盗、赤拟谷盗和玉米象等储粮害虫的防治效果显著，杀虫率达到100%；大豆粗脂肪酸值、蛋白质溶解比率和水分等指标变化较小；与氮气气调技术相比,二氧化碳气体损失的速度较氮气快 ...
郭轩宇，谢军，张学娣，陆峰，王运坤，张志林 GUO Xuanyu, XIE Jun, ZHANG Xuedi, LU Feng, WANG Yunkun, ZHANG Zhilin
doaj +1 more source
, 2008 采用基于密度泛函理论的平面波赝势方法和广义梯度近似，对未掺杂、掺B、掺N的碳纳米管(CNT)不同位置上Al原子的吸附进行了几何优化，计算了吸附Al、掺杂前后CNT的能带结构、态密度、差分电荷密度、电荷布居数和吸附能.计算结果表明，掺B使CNT形成缺电子状态，利于具有自由电子的Al原子的吸附结合，可显著提高Al在金属性的(5，5)CNT和半导性的(8，0)CNT外壁的吸附能；掺杂N形成多电子状态，在费米能级附近半满的施主能级也利于填充Al的价电子，改善Al在(5，5)CNT和(8，0 ...
王昆鹏 +3 more
semanticscholar +1 more source
Engineering 2D Materials for High‐Current‐Density Electrocatalytic Water Splitting
Rare Metals, EarlyView.ABSTRACT Water electrolysis is a key method for sustainable hydrogen production, using water as an abundant resource. However, efficient and stable operation at high current densities remains challenging due to energy losses, catalyst degradation, and limited ion–electron transport.
Tianqi Guan +8 more
wiley +1 more source
Rare Metals, EarlyView.ABSTRACT Silicon oxide (SiO) is becoming the main anode for high‐energy lithium‐ion batteries because of its ease of manufacture, outstanding cycling stability, and high capacity. However, low initial Coulombic efficiency (ICE) caused by the irreversible reaction of silica, as the main issue, strictly limits its commercial applications.
Hailong Mei +5 more
wiley +1 more source
Rare Metals, EarlyView.ABSTRACT Converting CO2 to CH4 under mild conditions is a promising strategy for solving environmental and energy problems, but also a challenge. In this work, the low‐temperature CO2 hydrogenation process over Ni/CeO2 catalysts was significantly accelerated by optimizing the H2 dissociation ability of Ni through the size effect, thus A‐Ni/CeO2 with an
Yu Xie +8 more
wiley +1 more source
Carbon‐Insertion‐Engineered WS2 Hierarchical Heterostructure Enabling Superior Sodium‐Ion Storage
Rare Metals, EarlyView.ABSTRACT Tungsten disulfide (WS2) is considered a promising anode material for sodium‐ion batteries (SIBs). However, its practical application is hindered by poor electrical conductivity, large volume changes during cycling, and sluggish ion diffusion kinetics, which lead to unsatisfactory electrochemical performance.
Xiuli Hu +9 more
wiley +1 more source
Rare Metals, EarlyView.ABSTRACT The sluggish kinetics of the oxygen reduction reaction (ORR) necessitate developing oxygen electrodes with enhanced electrocatalytic activity for practical zinc–air battery applications. In this study, an iron‐doped copper sulfide electrocatalyst (CuFeNS‐PNC) anchored on metal–organic framework‐derived carbon substrates was designed, featuring
Taichong Chitboonyakasem +4 more
wiley +1 more source
Rare Metals, EarlyView.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