Beyond Extended Surfaces: Understanding the Oxygen Reduction Reaction on Nanocatalysts,Journal of the American Chemical Society

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Beyond Extended Surfaces: Understanding the Oxygen Reduction Reaction on Nanocatalysts
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2020-09-30 , DOI: 10.1021/jacs.0c07696
Zeyan Liu ₁ , Zipeng Zhao ₁ , Bosi Peng ₂ , Xiangfeng Duan ₂ , Yu Huang _{1,

3}

Affiliation

Increasing the platinum utilization efficiency is the key to the advancement and broad dissemination of proton-exchange-membrane fuel cells (PEMFCs). Central to the task is the creation of highly active and durable Pt-based catalysts for the cathodic oxygen reduction reaction (ORR), which demands a comprehensive understanding of the ORR processes on these catalysts under reaction conditions. Past efforts have accumulated a vast wealth of knowledge of the ORR on extended Pt and Pt-alloy model surfaces. While the knowledge has been applied to understanding and designing ORR catalysts, it has also been recognized that these understandings cannot always translate into nanoscale systems. In this Perspective, we will review the progress that the theoretical descriptor has evolved to reconcile the observed differences between extended and nanoscale Pt surfaces, and we highlight the needs in advancing both characterizations and theories in order to understand ORR in the more complex Pt-alloy nanocatalysts. Particularly, understanding the dynamic structure-composition-function relation of Pt-alloy nanocatalysts during ORR demands concerted efforts in precision synthesis, advanced atomistic-scale in situ characterization, and comprehensive computational models.

中文翻译：

超越扩展表面：了解纳米催化剂上的氧还原反应

提高铂的利用效率是质子交换膜燃料电池（PEMFCs）进步和广泛推广的关键。该任务的核心是为阴极氧还原反应 (ORR) 创建高活性和耐用的 Pt 基催化剂，这需要全面了解这些催化剂在反应条件下的 ORR 过程。过去的努力积累了大量关于扩展 Pt 和 Pt 合金模型表面上 ORR 的知识。虽然这些知识已应用于理解和设计 ORR 催化剂，但人们也认识到，这些理解并不总是能转化为纳米级系统。在这个视角下，我们将回顾理论描述符的发展进展，以协调扩展和纳米级 Pt 表面之间观察到的差异，我们强调推进表征和理论的需求，以了解更复杂的 Pt 合金纳米催化剂中的 ORR。特别是，理解 ORR 过程中 Pt 合金纳米催化剂的动态结构-成分-功能关系需要在精密合成、先进的原子尺度原位表征和综合计算模型方面的共同努力。

更新日期：2020-09-30

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