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Toward the fast and durable alkaline hydrogen oxidation reaction on ruthenium
Energy & Environmental Science ( IF 32.5 ) Pub Date : 2022-09-09 , DOI: 10.1039/d2ee02216h
Baohua Zhang , Xuezhang Xiao , Jian Chen , Yongfeng Liu , Hongge Pan , Wenping Sun , Mingxia Gao

Anion exchange membrane fuel cells (AEMFCs) are becoming highly attractive for the efficient utilization of hydrogen energy due to the rapid development of platinum group metal (PGM)-free electrocatalysts for the cathodic oxygen reduction reaction. However, the kinetics of the anodic hydrogen oxidation reaction (HOR) in alkaline media is much more sluggish than the case in acid media. Ruthenium (Ru) possesses reasonable hydrogen binding energy and oxyphilic ability to reach balanced adsorption of OHad and Had at low anode potentials, and, to a certain degree, Ru-based electrocatalysts are considered as potential alternatives to Pt toward the alkaline HOR. Although a number of reviews have overviewed the development of alkaline HOR electrocatalysts from different viewpoints, a systematic review on Ru-based alkaline HOR electrocatalysts is still rare. In this review, we summarize the recent advances in Ru-based electrocatalysts for the alkaline HOR. The fundamental reaction mechanisms of the electrocatalytic HOR under alkaline conditions are introduced and discussed. Then, the recent advances in Ru-based electrocatalysts are summarized on the basis of four catalyst-design strategies including the composition effect, support effect, size effect, and structure effect. Finally, perspectives on the challenges and opportunities toward developing advanced Ru-based HOR electrocatalysts are also highlighted.

中文翻译:

对钌进行快速且持久的碱性氢氧化反应

由于用于阴极氧还原反应的无铂族金属 (PGM) 电催化剂的快速发展,阴离子交换膜燃料电池 (AEMFC) 在高效利用氢能方面变得非常有吸引力。然而,碱性介质中的阳极氢氧化反应 (HOR) 的动力学比酸性介质中的情况慢得多。钌 (Ru) 具有合理的氢结合能和亲氧能力,可实现 OH ad和 H ad的平衡吸附在低阳极电位下,并且在一定程度上,Ru 基电催化剂被认为是 Pt 对碱性 HOR 的潜在替代品。尽管许多评论从不同的角度概述了碱性 HOR 电催化剂的发展,但对 Ru 基碱性 HOR 电催化剂的系统评价仍然很少。在这篇综述中,我们总结了用于碱性 HOR 的 Ru 基电催化剂的最新进展。介绍并讨论了碱性条件下电催化HOR的基本反应机理。然后,基于组成效应、载体效应、尺寸效应和结构效应四种催化剂设计策略,总结了Ru基电催化剂的最新进展。最后,
更新日期:2022-09-09
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