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| 1 | Wavy PtCu alloy nanowire networks with abundant surface defects enhanced oxygen reduction reaction显示文摘Bimetalic platinum-copper(Pt-Cu)alloy nanowires have emerged as a novel class of fuel cell electrocatalysts for oxygen reduction reaction(ORR)due to their intrinsic high catalytic activity and durability,but preparing such electrocatalysts with clean surface via facile method is still a challenge.Herein,PtCu alloy with nanowire networks(NWNs)structure is obtained by a simple modified polyol method accompanied with a salt-mediated self-assembly process in a water/ethylene glycol(EG)mixing media.The formation mechanism of PtCu NWNs including the morphological evolution and the relevant experimental parameters has been investigated systematically.We propose that a micro-interface in H2O-EG media formed with the assistance of disodium dihydrogen pyrophosphate(Na2H2P2O7)and its unique nature of coordinating with Pt^2+ or Cu^2+ play critical roles in the formation of NWNs.When tested as ORR catalyst,the PtCuNWNs/C exhibits much higher activity and durability than that of PtNWNs/C and commercial PtC,even exceeding the target of DOE in 2020.The excellent performance of PtCuNWNs/C could be attributed to the unique structure of NWNs with 2.4 nm ultrathin wavy nanowires and plentiful surface defects and the modified electronic effect caused by alloying with Cu atoms. | Dahui Fang Lei Wan Qike Jiang Hongjie Zhang Xuejun Tang Xiaoping Qin Zhigang Shao Zidong Wei | 2019 | Nano Research2019，12，11： | 4 |
| 2 | 质子交换膜燃料电池催化剂纳米铂材料研究进展显示文摘提高活性、降低贵金属担载量是质子交换膜燃料电池(PEMFC)催化剂的重点研究内容,纳米铂材料是提高阴极氧还原反应(ORR)活性的核心研究方向之一。基于对104篇文献的分析,综述了纳米铂颗粒的粒径、晶面和形貌对催化剂的活性和寿命的影响,以及纳米铂合金的成分和核-壳结构等因素对催化性能的影响。分析现有方法技术的优点和不足,提出催化剂有序化结构和优化ORR反应过程的研究方向。 | 王志达 甘源 闫常峰 刘光华 | 2020 | 贵金属2020，41，4： | 3 |
| 3 | 电沉积制备三元Pt-Sn-Co合金纤维及氧还原电催化性能表征显示文摘采用CoCl2-SnCl2-1-乙基-3-甲基氯化咪唑(EMIC)离子液体,碳纸为基体,在-0.5V恒电位下无模板电沉积得到了SnCo0.73合金纤维。在K2PtCl4溶液和抗坏血酸中进行化学还原反应后,制备了PtSn23.2Co17.4纤维。电化学实验表明:经过500次循环后,PtSn23.2Co17.4纤维的电化学活性面积(ECSA)相对于商用催化剂(JM-Pt/C)下降得更慢。在0.85V时,PtSn23.2Co17.4纤维的质量比活性和面积比活性分别为23.35mA/mg和0.048mA/cm^2,分别是JM-Pt/C催化剂的1.3倍和1.5倍。在0.9V时,PtSn23.2Co17.4纤维的质量比活性和面积比活性分别为12.67mA/mg和0.026mA/cm^2,分别是JM-Pt/C催化剂的2.6倍和3.3倍。经过500次循环后,在0.85V和0.9V,PtSn23.2Co17.4纤维的质量比活性和面积比活性均明显高于JM-Pt/C催化剂。此外,负载PtSn23.2Co17.4纤维的碳纸可以作为电极直接组装进燃料电池,简化了燃料电池的制备过程。 | 刘帅 王乐萍 田林 杨妮 谢刚 李冰 | 2020 | 有色金属工程2020，10，2： | 2 |
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