Graphene-templated synthesis of palladium nanoplates as novel electrocatalyst for direct methanol fuel cell
Graphene-templated synthesis of palladium nanoplates as novel electrocatalyst for direct methanol fuel cell
复制标题
石墨烯模板合成钯纳米板作为直接甲醇燃料电池的新型电催化剂
DOI：
10.1016/j.apsusc.2018.10.050
复制
发表时间：
2019
影响因子：
6.7
通讯作者：
He Yunbin
中科院分区：
文献类型：
--
作者：
Yang Hujiang;Geng Liang;Zhang Yuting;Chang Gang;Zhang Zaoli;Liu Xiong;Lei Ming;He Yunbin
石墨烯表面负载的钯纳米晶体的形状控制合成对于设计直接甲醇燃料电池的电催化剂具有重要意义。这项工作展示了以石墨烯为模板的新型钯纳米板结构（PdNPts/G）的合成和表征。聚乙烯基吡咯烷酮和石墨烯模板的组合使用对于通过使用抗坏血酸作为软还原剂的一步还原策略成功获得新型钯纳米片至关重要。特别是，由于具有主导活性{110}晶面的Pd纳米片的高表面积与质量比的存在以及石墨烯增强的电子转移，所制备的PdNPts/G在甲醇电氧化方面表现出优异的电催化活性以及令人满意的稳定性和比商业Vulcan XC-72和石墨烯负载的Pd纳米颗粒（分别缩写为PdNPs/V和PdNPs/G）更高的耐受性。
The shape-controlled synthesis of Pd nanocrystals supported on the surface of graphene is of great importance in designing an electrocatalyst for direct methanol fuel cells. This work demonstrates the synthesis and characterization of a novel Pd nanoplate structure templated by graphene (PdNPts/G). The combined use of Poly Vingl Pyrrolidone and a graphene template is critical to successfully obtaining novel palladium nanoplatesviaa one-step reduction strategy using ascorbic acid as a soft reductant. In particular, owing to the presence of a high surface area to mass ratio of Pd nanoplates with dominant active {1 1 0} crystal facets and the enhanced electron transfer of graphene, the as-prepared PdNPts/G shows superior electrocatalytic activity along with satisfactory stability and greater tolerance over both the commercial Vulcan XC-72 and graphene supported Pd nanoparticles (abbr. PdNPs/V and PdNPs/G, respectively) for methanol electro-oxidation.