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首页> 外文期刊>ACS catalysis >Three-Dimensional Pd3Pb Nanosheet Assemblies: High-Performance Non-Pt Electrocatalysts for Bifunctional Fuel Cell Reactions
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Three-Dimensional Pd3Pb Nanosheet Assemblies: High-Performance Non-Pt Electrocatalysts for Bifunctional Fuel Cell Reactions

机译：三维PD3PB纳米片组件：用于双官能燃料电池反应的高性能非PT电催化剂

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摘要

Even though extensive efforts have been devoted to pursue promising electrocatalysts, the design of high-efficiency and low-cost electrocatalysts continues to be a formidable challenge for commercializing electrochemical energy technologies. Herein, we report the successful creation of a class of three-dimensional ordered Pd3Pb nanosheet assemblies (NSAs) via a wet-chemical approach. Such controlled nanostructures with ordered phase and highly open structure exhibit enhanced electrochemical activity and durability for both the anodic methanol oxidation reaction (MOR) and cathodic oxygen reduction reaction (ORR). In particular, the ordered Pd3Pb NSAs show ORR mass and specific activities of 0.697 A mg(pd)(-1) and 0.989 mA cm(-2) at 0.90 V versusthe reversible hydrogen electrode (RHE), which are 8.3 (10.9) and 7.5 (6.4) times higher than those of the commercial Pt/C (Pd/C), respectively, making them among the most efficient catalysts ever achieved for Pd-based ORR catalysts to date. In addition, the ordered Pd3Pb NSAs can even sustain at least 20000 potential cycles with limited activity decay and structure change.
机译：尽管致力于奉献广泛的努力来追求有前途的电催化剂，但高效和低成本电催化剂的设计仍然是对商业化学能源技术的强大挑战。这里，我们通过湿化学方法报告成功创建一类三维有序PD3PB纳米片组件（NSAS）。具有有序相和高开裂结构的这种受控纳米结构表现出增强的电化学活性和用于阳极甲醇氧化反应（MOR）和阴极氧还原反应（ORR）的耐久性。特别地，订购的PD3PB NSAS显示ORR质量和0.697A（Pd）（ - 1）和0.989 mA cm（-2）的特定活性为0.90V，与可逆氢电极（RHE）为8.3（10.9）和7.5（6.4）分别高于商业Pt / c（Pd / c）的倍增，使其在迄今为止迄今为止迄今为止迄今为止的Pd的ORR催化剂达到的最有效的催化剂。此外，订购的PD3PB NSA甚至可以维持至少20000个潜在周期，具有有限的活性衰减和结构变化。

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