NiCoPd Inlaid NiCo-Bimetallene for Efficient Electrocatalytic Methanol Oxidation,Inorganic Chemistry

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NiCoPd Inlaid NiCo-Bimetallene for Efficient Electrocatalytic Methanol Oxidation
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2022-06-18 , DOI: 10.1021/acs.inorgchem.2c01534
Long Zhao ₁ , Ming Wen ₁ , Hao Fang _{1,

2} , Kexin Meng ₁ , Xiaoyu Qiu ₁ , Qingsheng Wu ₁ , Yongqing Fu ₃

Affiliation

Pd-based metallenes have attracted great attention recently as newly burgeoning two-dimensional (2D) materials, attributed to their significantly increased active surface areas and intrinsic electrocatalytic activities. Therefore, they could be used as a potential candidate as the high-performance electrocatalyst for methanol oxidation reactions (MORs) in the direct methanol fuel cell. Herein, a new strategy is proposed to fabricate NiCoPd inlaid NiCo-bimetallene (NiCoPd/NiCo-bimetallene) by the structure directing effect of 18-crown-6 ether under an ultrasonic-pulse interface together with the HCHO reduction and atom-diffusion-aging process. NiCoPd ternary-alloys with uniformly dispersed Pd active sites are decorated onto NiCo-bimetallenes, achieving remarkably enhancing the effective utilization of Pd atoms. What is more, the intrinsic activity is enhanced by the “bifunctional mechanism” of NiCo-bimetallene adsorption of intermediate species and increased Pd-active sites. Moreover, the anti-CO poisoning ability is optimized through the “alloying ligand effect” of NiCoPd. Therefore, the NiCoPd/NiCo-bimetallene exhibits excellent mass activity for MOR, which is higher than commercial Pd/C. This work suggests a new way of the Pd-based metallenes catalyst approach to the efficient electrocatalytic MOR.

中文翻译：

NiCoPd 镶嵌 NiCo-双金属烯用于高效电催化甲醇氧化

钯基金属烯作为新兴的二维（2D）材料最近引起了极大的关注，这归因于它们显着增加的活性表面积和固有的电催化活性。因此，它们可用作直接甲醇燃料电池中甲醇氧化反应（MOR）的高性能电催化剂的潜在候选者。在此，本文提出了一种利用超声脉冲界面下 18-crown-6 醚的结构导向效应以及 HCHO 还原和原子扩散时效制备 NiCoPd 镶嵌 NiCo-bimetallene (NiCoPd/NiCo-bimetallene) 的新策略。过程。将具有均匀分散的 Pd 活性位点的 NiCoPd 三元合金装饰在 NiCo 双金属烯上，显着提高了 Pd 原子的有效利用率。更，NiCo-双金属烯吸附中间物质和增加 Pd 活性位点的“双功能机制”增强了内在活性。此外，通过NiCoPd的“合金配体效应”优化了抗CO中毒能力。因此，NiCoPd/NiCo-双金属对 MOR 表现出优异的质量活性，高于商业 Pd/C。这项工作为高效电催化 MOR 提供了一种新的 Pd 基金属烯催化剂方法。

更新日期：2022-06-18

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