Results 51 to 60 of about 5,396 (208)
Rare Metals, EarlyView.ABSTRACT The development of high‐performance and stable electrocatalysts for oxygen reduction reaction (ORR), oxygen evolution reaction (OER), and hydrogen evolution reaction (HER) plays a critical role in advancing clean energy technologies, including metal‐air batteries and hydrogen production through overall water splitting.
Chen‐Yu Cai +4 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, EarlyView.ABSTRACT Efficient and durable bifunctional electrocatalysts are vital for scalable water electrolysis. Here, we realize cobalt‐vacancy (Covac) engineering in CoFeP supported on N,P‐codoped carbon nanocages (Co1‐vacFeP/NPC) through a simple route comprising a CoFe Prussian blue analog precursor, phosphidation–pyrolysis, tannic‐acid etching, and a ...
Yuan‐Liang Yuan +6 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, EarlyView.ABSTRACT The development of efficient and stable bifunctional catalysts remains a key challenge for green hydrogen production via electrochemical water splitting. In this study, a bimetallic Mo/Fe‐doped CoP2 nanoleaf array anchored on carbon cloth (Mo, Fe‐CoP2@CC) was synthesized from zeolitic imidazolate framework‐L (ZIF‐L) via an ion‐exchange and low‐
Xiangqun Zeng +6 more
wiley +1 more source
Polyoxometalates and Zeolitic Imidazolate Frameworks in Catalysis for Energy Conversion [PDF]
, 2016 能源是当今人类必不可少的生产生活资料。自工业革命以来，人类利用化石能源取得了空前的发展和进步。时至今日，化石能源依旧占据了人类能源消耗总量的头把交椅。但随着化石能源的不断消耗，储量的日益枯竭，同时还受到政治经济环境和全球储量不平均的影响，其价格波动较大。更为重要的是，化石能源不仅在资源开采的过程中会对自然环境造成破坏，而且在使用的过程中也会产生较多的污染环境的物质。综合以上各方面因素，人类亟需开发出新型可再生能源，以取代不可再生的化石能源。 太阳能以其采集的便利、对环境的友好和取之不尽的储量 ...
张超
core
Rare Metals, EarlyView.ABSTRACT Precise control of chemical ordering in bimetallic nanocatalysts offers a route to decouple activity and selectivity in acetylene hydrogenation, but direct atomic‐scale evidence linking surface order to catalytic performance is scarce. Here, we tune Pd‐Cu nanoalloys from chemically disordered to highly ordered states by composition control and
Fan Xue +5 more
wiley +1 more source
Preparation and Research of Electrospun PVDF Gel Polymer Electrolyte [PDF]
, 2016 凝胶态聚合物电解质是介于纯固态聚合物电解质和液态电解质的一种电解质，它既可以在常温下有较好的离子电导率，也可以一定程度地解决漏液、易燃、易爆等安全问题，因此受到了广泛关注。基于静电纺丝技术制备的聚合物纤维膜由于较高的孔隙率和较好的表面形貌，可以和有机电解液结合组成凝胶态聚合物电解质，表现出优异的电化学性能，在锂离子电池电解质领域有良好的发展前景。聚偏氟乙烯（PVDF）较高的介电常数和较低的玻璃化转变温度使它成为研究者制备聚合物电解质的常用材料之一。但是由于较高的结晶度和疏水性 ...
武晓林
core
Rare Metals, EarlyView.ABSTRACT As a core component in the electrochemical water splitting system, the cathode catalyst is capable of boosting the kinetics of the hydrogen evolution reaction (HER), while the scarcity and expenditure of current noble metal‐based electrocatalysts seriously restrict the large‐scale commercial development of hydrogen manufacturing devices. Here,
Haiyan He +8 more
wiley +1 more source
Solution synthesis and characterization of nickel nanosheets [PDF]
, 2016 具有形状各向异性的镍纳米晶在催化、磁记录、生物、电极材料等诸多领域具有重要的应用价值，因此探索一种简便可靠的合成方法来制备尺寸和形貌可控的镍纳米晶具有重要的研究意义。本论文通过有机液相法合成出了镍纳米片，研究了不同的制备参数对镍纳米晶的形貌、尺寸和结构的影响，并表征了其磁学性质和催化对硝基酚还原的性能。 本文首先以油胺作为溶剂和还原剂，乙酰丙酮镍作为镍前驱体，六羰基钨作为形核诱导剂，合成出了尺寸可控的镍纳米片。在较低的反应温度（160℃）和较短的保温时间下可以得到尺寸为15nm的镍纳米片 ...
汪志超
core