文章信息/Info

Title:

Research Progress on Pt-Based Catalysts Based on Structural Regulation for Oxygen Reduction Reaction

文章編號:

1674-3962(2024)09-0765-08

作者:

劉優林; 李董艷; 沈岳松

1.南京工業大學材料科學與工程學院，江蘇 南京 211816 2.南京工業大學化學與分子工程學院，江蘇 南京 211816

Author(s):

LIU Youlin;  LI Dongyan;  SHEN Yuesong

1. College of Materials Science and Engineering, Nanjing Tech University, Nanjing 211816, China 2. School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China

關鍵詞:

結構調控; Pt基納米催化劑; 氧還原反應; 形貌; 晶面; 晶相; 電子結構

Keywords:

structural regulation;  Pt-based nano-catalyst;  oxygen reduction reaction; morphology;  crystal phase;  crystal phase;  electronic structure

分類號:

O643.36

DOI:

10.7502/j.issn.1674-3962.202401017

文獻標志碼:

A

摘要:

貴金屬Pt基催化劑作為氧還原反應（ORR）中重要的催化劑之一，因儲量有限且價格昂貴，限制了其規模化應用。如何提高Pt的利用率是目前開發高性能氧還原催化劑的關鍵。特別是，對催化劑進行結構調控（形貌、晶相、晶面、電子結構），可以有效提升Pt原子利用率及其本征活性，但由于表面效應和小尺寸效應使Pt納米粒子具有較高的表面能和化學活性，導致它在化學反應中不穩定，影響催化劑的壽命。因此，開發具有高本征活性、高暴露活性晶面且結構穩定的Pt基催化劑依然是質子交換膜燃料電池領域的一個重大挑戰。針對近年來該領域催化劑的研究進展進行綜述。重點討論通過調控Pt基納米催化劑的形貌、晶相、晶面和電子結構等結構要素，提高Pt基納米催化劑氧還原性能的設計理念與制備技術。最后簡要總結Pt基納米催化劑面臨的挑戰和研究重點。

Abstract:

Precious-metal Pt-based catalysts, as one of the important catalysts in oxygen reduction reaction (ORR), have the limited reserves and high prices, limiting their large-scale application. How to improve the utilization rate of Pt is currently the key to develop high-performance catalysts for ORR. Especially, structure regulation (morphology, crystal phases, exposed crystal planes, electronic structure) of catalysts can effectively improve the utilization efficiency and intrinsic activity of Pt atoms. However, Pt nanoparticles have high surface energy due to their surface effect and small size effect, which leads to their instability in chemical reactions and affects the lifespan of the catalyst. Therefore, it remains still a major challenge to obtain Pt nanoparticles with high intrinsic activity, high exposure activity, and stable structure for Pt�瞓ased catalysts in the field of proton exchange membrane fuel cell (PEMFC). This article provides a review of the research progress in this field in recent years. The focus is on discussing the design concept and preparation technology of improving the oxygen reduction performance of Pt based nanocatalysts by regulating their structural elements such as morphology, crystal phase, crystal plane, and electronic structure. Finally, a brief summary is given for the challenges and research priorities faced by Pt-based catalysts for ORR.