Design of ultrathin Pt-Mo-Ni nanowire catalysts for ethanol electrooxidation.
Design of ultrathin Pt-Mo-Ni nanowire catalysts for ethanol electrooxidation.
复制标题
用于乙醇电氧化的超薄Pt-Mo-Ni纳米线催化剂的设计
DOI：
10.1126/sciadv.1603068
复制
发表时间：
2017-08
期刊：
影响因子：
13.6
通讯作者：
Li Y
中科院分区：
文献类型：
--
作者：
Mao J;Chen W;He D;Wan J;Pei J;Dong J;Wang Y;An P;Jin Z;Xing W;Tang H;Zhuang Z;Liang X;Huang Y;Zhou G;Wang L;Wang D;Li Y
研究人员设计了超薄的铂-钼-镍纳米管，作为成本效益高、活性强、耐用的电催化剂。开发经济、活性、耐用的电催化剂是燃料电池商业化最重要的问题之一。采用氢气辅助溶液法(HASR)制备了直径约2.5 nm、长度可达数微米的铂钼镍超细纳米线。该催化剂的设计基于以下三点：(I)具有较高表面原子数的超薄纳米粒子可以提高铂的原子效率，从而降低催化剂成本；(Ii)镍的加入可以使铂原子孤立在表面并产生表面缺陷，从而获得高催化活性(球差校正电子显微镜测量和乙醇氧化实验分别证实了其独特的结构和优异的活性)；(Iii)钼的加入可以稳定镍和铂原子，从而获得高催化稳定性，这一点得到了实验和密度泛函理论计算的证实。此外，所开发的HASR策略还可以扩展到合成一系列的Pt-Mo-M(M=Fe，Co，Mn，Ru等)。NWS。这些多金属核将为燃料电池的实际应用开辟新的机会。
Researchers design ultrathin Pt-Mo-Ni NWs as cost-effective, active, and durable electrocatalysts. Developing cost-effective, active, and durable electrocatalysts is one of the most important issues for the commercialization of fuel cells. Ultrathin Pt-Mo-Ni nanowires (NWs) with a diameter of ~2.5 nm and lengths of up to several micrometers were synthesized via a H2-assisted solution route (HASR). This catalyst was designed on the basis of the following three points: (i) ultrathin NWs with high numbers of surface atoms can increase the atomic efficiency of Pt and thus decrease the catalyst cost; (ii) the incorporation of Ni can isolate Pt atoms on the surface and produce surface defects, leading to high catalytic activity (the unique structure and superior activity were confirmed by spherical aberration–corrected electron microscopy measurements and ethanol oxidation tests, respectively); and (iii) the incorporation of Mo can stabilize both Ni and Pt atoms, leading to high catalytic stability, which was confirmed by experiments and density functional theory calculations. Furthermore, the developed HASR strategy can be extended to synthesize a series of Pt-Mo-M (M = Fe, Co, Mn, Ru, etc.) NWs. These multimetallic NWs would open up new opportunities for practical fuel cell applications.
登录
查看更多内容
影响因子：
3.7
作者：
Kresse, G;Furthmuller, J
通讯作者：
Furthmuller, J
影响因子：
4.4
作者：
HORSLEY, JA
通讯作者：
HORSLEY, JA
影响因子：
9.2
作者：
Lamy, Claude;Jaubert, Thomas;Coutanceau, Christophe
通讯作者：
Coutanceau, Christophe
影响因子：
4.4
作者：
LYTLE, FW;WEI, PSP;SINFELT, JH
通讯作者：
SINFELT, JH
影响因子：
2.5
作者：
Ravel, B;Newville, M
通讯作者：
Newville, M