文章信息/Info

Title:

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

文章編號(hào):

1674-3962(2024)09-0765-08

作者:

劉優(yōu)林; 李董艷; 沈岳松

1.南京工業(yè)大學(xué)材料科學(xué)與工程學(xué)院，江蘇 南京 211816 2.南京工業(yè)大學(xué)化學(xué)與分子工程學(xué)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(guān)鍵詞:

結(jié)構(gòu)調(diào)控; Pt基納米催化劑; 氧還原反應(yīng); 形貌; 晶面; 晶相; 電子結(jié)構(gòu)

Keywords:

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

分類(lèi)號(hào):

O643.36

DOI:

10.7502/j.issn.1674-3962.202401017

文獻(xiàn)標(biāo)志碼:

A

摘要:

貴金屬Pt基催化劑作為氧還原反應(yīng)（ORR）中重要的催化劑之一，因儲(chǔ)量有限且價(jià)格昂貴，限制了其規(guī)�；瘧�(yīng)用。如何提高Pt的利用率是目前開(kāi)發(fā)高性能氧還原催化劑的關(guān)鍵。特別是，對(duì)催化劑進(jìn)行結(jié)構(gòu)調(diào)控（形貌、晶相、晶面、電子結(jié)構(gòu)），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(yīng)和小尺寸效應(yīng)使Pt納米粒子具有較高的表面能和化學(xué)活性，導(dǎo)致它在化學(xué)反應(yīng)中不穩(wěn)定，影響催化劑的壽命。因此，開(kāi)發(fā)具有高本征活性、高暴露活性晶面且結(jié)構(gòu)穩(wěn)定的Pt基催化劑依然是質(zhì)子交換膜燃料電池領(lǐng)域的一個(gè)重大挑戰(zhàn)。針對(duì)近年來(lái)該領(lǐng)域催化劑的研究進(jìn)展進(jìn)行綜述。重點(diǎn)討論通過(guò)調(diào)控Pt基納米催化劑的形貌、晶相、晶面和電子結(jié)構(gòu)等結(jié)構(gòu)要素，提高Pt基納米催化劑氧還原性能的設(shè)計(jì)理念與制備技術(shù)。最后簡(jiǎn)要總結(jié)Pt基納米催化劑面臨的挑戰(zhàn)和研究重點(diǎn)。

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.