To date, substantial efforts have been made to improve the electrocatalytic performance and durability of Pt-based catalysts for the methanol oxidation reaction (MOR). However, these catalysts are still limited by their high susceptibility to poisoning due to strong CO_ads adsorption on Pt surfaces. Herein, a new MOR catalyst is reported as a possible solution to this challenge. This catalyst features cobalt carbonate hydroxide (CoCH) nanorods that are intimately enclosed by Pt/Vulcan XC-72 carbon (Pt/C), wherein Pt nanoparticles with a diameter of ∼2 nm are uniformly decorated on Vulcan XC-72 carbon. Compared to Pt/C, CoCH–Pt/C exhibits impressive MOR activity and durability. More importantly, the CoCH–Pt/C catalyst can maintain 40% of its initial activity after 10,000 s of chronopotentiometry and can be fully reactivated by running several CV cycles in 1 M KOH. The incorporation of CoCH is believed to play a major role in facilitating the oxidative removal of CO_ads at adjacent Pt sites, since it can readily promote water dissociation to form OH_ads in alkaline electrolytes. This finding was confirmed by CO-stripping, impedance spectra and CO poisoning experiments. The bifunctional interaction between Pt and CoCH provides a valuable reference for designing new high-performance MOR electrocatalysts.

迄今为止，已经做出了很大的努力来改善用于甲醇氧化反应（MOR）的Pt基催化剂的电催化性能和耐久性。但是，由于强烈的CO_吸附，这些催化剂仍然受到其对中毒的高敏感性的限制。吸附在铂表面上。在本文中，据报道新的MOR催化剂可以解决这一挑战。该催化剂的特征是被Pt / Vulcan XC-72碳（Pt / C）紧密包裹的氢氧化钴氢氧化物（CoCH）纳米棒，其中直径约2 nm的Pt纳米颗粒均匀地装饰在Vulcan XC-72碳上。与Pt / C相比，CoCH–Pt / C表现出令人印象深刻的MOR活动和耐久性。更重要的是，CoCH–Pt / C催化剂在10,000 s计时电位法后可以保持其40％的初始活性，并且可以通过在1 M KOH中运行多个CV循环而完全活化。据信，CoCH的加入在促进相邻Pt位点处的CO_广告的氧化去除方面起主要作用，因为它可以很容易地促进水的离解形成OH_广告。在碱性电解液中。二氧化碳剥离，阻抗谱和二氧化碳中毒实验证实了这一发现。Pt和CoCH之间的双功能相互作用为设计新型高性能MOR电催化剂提供了有价值的参考。