Graphene ribbon-supported Pd nanoparticles as highly durable, efficient electrocatalysts for formic acid oxidation
Graphene ribbon-supported Pd nanoparticles as highly durable, efficient electrocatalysts for formic acid oxidation
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DOI：
10.1016/j.electacta.2012.10.125
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发表时间：
2013-01
影响因子：
6.6
通讯作者：
Shuangyin Wang;A. Manthiram
中科院分区：
文献类型：
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作者：
Shuangyin Wang;A. Manthiram
石墨烯带负载的Pd纳米颗粒（Pd/GR）已经通过简单、清洁的方法在水介质中制备，仅涉及Pd前体和石墨烯带（GR）作为还原剂和催化剂载体。在石墨烯带上沉积了高密度的Pd纳米粒子，其平均粒径为0.28 ±0.8nm。与常规Pd/C电催化剂相比，所获得的Pd/GR电催化剂在峰值电流密度（1.4Amg-1vs. 0.79Amg−1）和峰值电位（−0.15V偏移）。Pd纳米粒子在石墨烯带上的分散性好、粒径小以及Pd与GR之间的协同作用使其具有较高的催化活性。更重要的是，由于Pd和GR之间的强相互作用，发现Pd/GR用于FAOR的耐久性显著增强。
Graphene ribbon-supported Pd nanoparticles (Pd/GR) have been prepared by a simple, clean process in aqueous medium, involving only a Pd precursor and graphene ribbon (GR) as both a reducing agent and a catalyst support. A high density of Pd nanoparticles with a small average particle size (∼2.8±0.8nm) could be successfully deposited on graphene ribbons. The as-obtained Pd/GR electrocatalysts show increased electrochemical surface area and significantly enhanced catalytic activity for formic acid oxidation reaction (FAOR) compared to the conventional Pd/C electrocatalysts in terms of peak current density (1.4Amg−1vs. 0.79Amg−1) and peak potential (−0.15V shift). Both the good dispersion and the relatively small particle size of the Pd nanoparticles on graphene ribbon and the synergetic effect between Pd and GR lead to high initial catalytic activity for FAOR. More importantly, a dramatic enhancement in durability is found with Pd/GR for FAOR due to the strong interaction between Pd and GR.