PdP/WO3 multi-functional catalyst with high activity and stability for direct liquid fuel cells (DLFCs),Sustainable Energy & Fuels

当前位置： X-MOL 学术 › Sustain. Energy Fuels › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

PdP/WO3 multi-functional catalyst with high activity and stability for direct liquid fuel cells (DLFCs)
Sustainable Energy & Fuels ( IF 5.0 ) Pub Date : 2021-08-13 , DOI: 10.1039/d1se00584g
Sachin Kumar _{1,

2} , Roby Soni ₃ , Sreekumar Kurungot _{1,

2}

Affiliation

Direct liquid fuel cells are energy conversion devices which utilize formate and methanol as fuels. These systems are relieved of the problem of H₂ transport and storage, making them highly desirable for various practical applications. However, the low stability and activity of carbon supported catalysts such as Pt/C both in the anode and cathode is a critical hindering factor towards their further development. As a practical solution to overcome this issue, in this work, we report on the development of phosphorus-doped palladium (PdP) nanoparticle-supported tungsten oxide (WO₃) nanorods (PdP/WO₃) as a versatile multifunctional catalyst for facilitating the oxidation of formate and methanol in the anode and the oxygen reduction reaction (ORR) in the cathode. Strong metal–support interactions and electronic modifications incurred by the doped phosphorus help this system to achieve desirable properties to enable it to effectively function both for the anode and cathode applications. PdP/WO₃ showed 16-times higher mass activity compared to Pt/C even after 3000 start/stop cycles for the ORR. For formate and methanol oxidation, PdP/WO₃ exhibited current densities of 0.50 and 0.734 A mg_Pd⁻¹, respectively, outperforming the state-of-the-art catalysts. With these bifunctional features, PdP/WO₃ stands out as a potential system to be used as an anode and cathode catalyst in direct liquid fuel cells, all the while offering an opportunity for the development of carbon-free electrocatalysts.

中文翻译：

用于直接液体燃料电池 (DLFC) 的具有高活性和稳定性的 PdP/WO3 多功能催化剂

直接液体燃料电池是利用甲酸盐和甲醇作为燃料的能量转换装置。这些系统解除了 H ₂运输和储存的问题，使其非常适合各种实际应用。然而，碳负载催化剂（如阳极和阴极中的 Pt/C）的低稳定性和活性是其进一步发展的关键阻碍因素。作为克服这个问题的实际解决方案，在这项工作中，我们报告了磷掺杂钯 (PdP) 纳米颗粒负载氧化钨 (WO ₃ ) 纳米棒 (PdP/WO ₃) 作为一种多功能的多功能催化剂，用于促进阳极中甲酸盐和甲醇的氧化以及阴极中的氧还原反应 (ORR)。掺杂磷引起的强金属-载体相互作用和电子修饰有助于该系统实现理想的特性，使其能够有效地用于阳极和阴极应用。即使在 ORR 的 3000 次启动/停止循环之后，PdP/WO _{3 也}显示出比 Pt/C 高 16 倍的质量活性。对于甲酸盐和甲醇氧化，PdP/WO _{3 的}电流密度分别为 0.50 和 0.734 A mg _Pd^-1，优于最先进的催化剂。凭借这些双功能特性，PdP/WO ₃ 作为在直接液体燃料电池中用作阳极和阴极催化剂的潜在系统脱颖而出，同时为无碳电催化剂的开发提供了机会。

更新日期：2021-08-27

点击分享查看原文

点击收藏

阅读更多本刊最新论文