|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | N-doped carbon-stabilized PtCo nanoparticles derived from Pt@ZIF-67: Highly active and durable catalysts for oxygen reduction reaction显示文摘The development of catalysts with high activity and durability for the cathodicoxygen reduction reaction (ORR) in both alkaline and acidic media is importantfor improving the performance of the proton exchange membrane (PEM) fuelcells. This can be achieved by dispersing Pt-based alloy nanoparticles insideN-doped porous carbon frameworks. However, it still requires the developmentof a facile method towards synthesizing this unique hybrid structure. In this work,we demonstrate that N-doped carbon-stabilized PtCo nanoparticles (PtCo@NC)can be facilely synthesized via thermal decomposition of Pt-incorporatedCo-based zeolitic imidazolate framework (Pt@ZIF-67). The thickness of the carbonframework can be optimized to enable excellent durability, in sharp contrastto a commercial Pt/C catalyst. The mass activities achieved by optimizing thethickness of the carbon framework are 0.80 and 0.82 A-mg^-1, at 0.9 V vs. RHE inalkaline and acidic electrolytes, respectively, which are nearly 8 times greaterthan those of the Pt/C. This work provides an alternative approach to low-costand high-verformance catalvsts for both alkaline and acidic fuel cells. | Nana Du Chengming Wang Ran Long Yujie Xiong | 2017 | Nano Research2017，10，9： | 8 |
| 2 | PtCO分子结构与解析势能函数显示文摘用密度泛函理论的B3P86方法,对铂原子采用LANL2DZ收缩价基函数,碳原子和氧原子采用6-311G*基组,对PtC,PtO和PtCO体系的结构进行优化,计算表明:PtC分子基态为~1∑^+态,键长为Re=0.16844 nm,离解能为6.31435 eV.PrO分子基态的平衡核间距为0.17486 nm,其电子态为~3∑^-,离解能为3.84565 eV,拟合得到Murrell-Sorbie势能函数;PtCO分子有两个线性稳定构型,其中一个构型为Pt-C(?)O(C_(∞v)),电子态为~1∑^+,平衡核间距为R_(PtC)=0.17672 nm,R_(CO)=0.11464 nm,离解能为14.46769 eV,另一个为Pt-O(?)C(C_(∞v)),电子态是~1∑^+,平衡核间距为R_(CO)=0.11243 nm,R_(PtO)=0.21886 nm,离解能为11.26729 eV.由微观过程的可逆性原理分析了分子的可能的离解极限,并用多体展式理论导出基态PtCO分子的势能函数,其等势面图准确地再现了PtCO分子的结构特征和离解能,由此讨论了Pt+CO,PtC+O,PtO+C分子反应的势能面静态特征. | 阮文 胡强林 谢安东 余晓光 罗文浪 朱正和 | 2010 | 四川大学学报(自然科学版)2010，47，3： | 3 |
| 3 | PtCo alloy nanoparticles supported on graphene nanosheets with high performance for methanol oxidation显示文摘PtCo alloy nanoparticles are deposited onto graphene sheets through a facile and reproducible hydrothermal method.During the hydrothermal reaction,the reduction of graphene oxide and PtCo alloy nanoparticles loading can be achieved.X-ray diffraction (XRD) analyses reveal a good crystallinity of the supported Pt nanoparticles in the composites and the formation of PtCo alloy.X-ray photoelectron spectra (XPS) results depict that Pt mainly exists in the metallic form,while much of the cobalt is oxidized.Transmission electron microscope (TEM) observations show that the PtCo alloy nanoparticles are uniformly dispersed on graphene nanosheets compared with multiwalled carbon nanotubes (MWNTs).This PtCo-graphene composite exhibits excellent electrocatalytic activity and high poison tolerance toward poisoning species for methanol oxidation reaction,far outperforming the Pt-graphene or PtCo-MWNTs composites with the same feeding ratio of Pt/carbon. | HUANG HuaJie SUN DongPing WANG Xin | 2012 | Chinese Science Bulletin2012，57，23： | 3 |
| 4 | PTCD引流管灵活应用于腹腔感染的引流显示文摘外科手术后或其它原因引起腹腔感染形成脓肿时,引流是消除感染最重要的措施之一,保持引流通畅使脓液或坏死组织引出体外是外科医生在处理腹腔感染时首要解决的问题。作者详细介绍了PTCD引流管的操作方法并讨论其优点。 | 孙强 邱辉忠 | 1996 | 腹部外科1996，9，1： | 1 |
| 5 | PtCo/CNTs-C纳米催化剂的制备及甲醇电催化氧化性能研究显示文摘以碳纳米管(CNTs)和XC-72R炭黑混合材料为载体,采用浸渍还原法制备了具有较高的电化学活性的催化材料PtCo/CNTs-C。采用X射线衍射(XRD)、透射电子显微镜(TEM)和X射线光电子能谱(XPS)对催化剂进行了结构表征。并将该材料用作了甲醇阳极氧化催化剂,考察了不同Co掺杂量以及温度对反应的影响。结果表明,PtCo/CNTs-C纳米催化剂中铂钴双金属形成合金,合金粒子在载体表面分布相对均匀。炭黑和金属Co的引入赋予了催化剂更高的催化活性。当Pt∶Co的质量比为94∶6时,催化剂对甲醇的催化氧化具有更低的起始电位(-0.651V(vs SCE))和更高的电流密度(86.74 mA/cm^(2)),且计时电流测试表明催化剂拥有良好的稳定性。 | 白雪丽 仇豪雷 赵子龙 刘煜成 王峰 张胜健 张小平 | 2023 | 燃料化学学报(中英文)2023，51，9： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员