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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >The one-pot synthesis of CuNi nanoparticles with a Ni-rich surface for the electrocatalytic methanol oxidation reaction
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The one-pot synthesis of CuNi nanoparticles with a Ni-rich surface for the electrocatalytic methanol oxidation reaction

机译：用富含Ni的电催化甲醇氧化反应用Ni-Rabi纳米粒子的单罐合成

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The use of fuel cells is one of the most promising renewable energy strategies, but they still suffer from many limitations. The high mass enthalpy of hydrogen as a fuel comes at the cost of inconveniences and risks associated with storage, transportation and utilization, while the high performance of Pt catalysts in commercial fuel cells is limited by their high cost, low earth abundance, and poor stability as a result of CO intermediate poisoning. To circumvent these dilemmas, direct methanol fuel cells (DMFCs) were developed, using methanol as a fuel and Ni as the anode catalyst. Thanks to the condensed form of the fuel, DMFCs are considered as the most promising fuel-cell solution for portable electronic devices. Usually, other elements have to be introduced into Ni-based catalysts to modify the active sites to provide better alternatives to pristine Ni metal in terms of activity and stability. In this study, we provide a mild synthetic method for the preparation of CuNi alloy nanoparticles. The proper alloying ratio leads to the suitable modification of the electronic structure of Ni, which promotes the MOR catalytic reaction on the NiCu alloy. The NiCu alloy catalyst exhibits a mass current density of 1028 mA mg(metal)(-1) for the MOR at 1.55 V (vs. RHE), which is among the best values obtained from similarly prepared Ni-based catalysts.
机译：使用燃料电池是最有前途的可再生能源策略之一，但它们仍然遭受许多限制。作为燃料的氢气的高质量焓呈不便，与储存，运输和利用相关的不便，而商用燃料电池中Pt催化剂的高性能受其高成本，低地球丰富和稳定性差的影响由于CO中中中毒。为了规避这些困境，使用甲醇作为燃料和Ni作为阳极催化剂，开发直接甲醇燃料电池（DMFC）。由于燃料的冷凝形式，DMFC被认为是便携式电子设备的最有希望的燃料电池解决方案。通常，必须将其他元素引入基于Ni的催化剂以改变活性位点，以在活性和稳定性方面提供更好的丙氨酸Ni金属的替代品。在该研究中，我们提供了一种温和的合成方法，用于制备CUNI合金纳米颗粒。适当的合金比率导致Ni的电子结构的合适改性，其促进了Nicu合金的MOR催化反应。 Nicu合金催化剂的质量电流密度为1028 mA mg（金属）（ - 1），用于MOR为1.55 V（与RHE），这是从类似制备的Ni基催化剂获得的最佳值之一。

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