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负载在活性石墨电极上的铂镍纳米颗粒对乙醇和2-丙醇氧化的电催化性能。

Electrocatalytic performance of Pt-Ni nanoparticles supported on an activated graphite electrode for ethanol and 2-propanol oxidation.

作者信息

Chelaghmia M L, Nacef M, Fisli H, Affoune A M, Pontié M, Makhlouf A, Derabla T, Khelifi O, Aissat F

机构信息

Laboratoire d'Analyses Industrielles et Génie des Matériaux, Département de Génie des Procédés, Université 8 Mai 1945 Guelma BP 401 Guelma 24000 Algeria

Laboratoire de Chimie Appliquée, Département des Sciences de la Matière, Université 8 Mai 1945 Guelma BP 401 Guelma 24000 Algeria.

出版信息

RSC Adv. 2020 Oct 7;10(61):36941-36948. doi: 10.1039/d0ra07331h.

DOI:10.1039/d0ra07331h
PMID:35521251
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9057040/
Abstract

Platinum (Pt) and platinum-nickel (Pt-Ni) electrocatalysts were prepared on activated graphite electrodes by an electrochemical deposition process. The electrocatalysts were analyzed by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX) and X-ray diffraction (XRD). The electrocatalytic activity of the prepared electrocatalysts, their stability, and the effect of temperature toward ethanol and 2-propanol oxidation were evaluated by cyclic voltammetry (CV), chronoamperometry and electrochemical impedance spectroscopy (EIS). The results showed that the Pt-Ni/C exhibited higher catalytic activity, better stability and better tolerance to poisoning by ethanol and 2-propanol oxidation intermediate species compared to Pt/C, which was interpreted as synergistic and electronic effects between Pt and Ni. A study of the temperature dependence of ethanol and 2-propanol oxidation in the temperature range of 298-318 K, shows that the apparent activation energy for ethanol and 2-propanol oxidation on Pt-Ni/C was lower than on Pt/C. The results also revealed that the electro-oxidation of ethanol and 2-propanol on Pt/C were improved by raising the temperature and Ni modification.

摘要

通过电化学沉积法在活化石墨电极上制备了铂（Pt）和铂镍（Pt-Ni）电催化剂。采用扫描电子显微镜（SEM）、能量色散X射线光谱（EDX）和X射线衍射（XRD）对电催化剂进行了分析。通过循环伏安法（CV）、计时电流法和电化学阻抗谱（EIS）评估了所制备电催化剂的电催化活性、稳定性以及温度对乙醇和2-丙醇氧化的影响。结果表明，与Pt/C相比，Pt-Ni/C在乙醇和2-丙醇氧化中表现出更高的催化活性、更好的稳定性以及对中毒的更好耐受性，这被解释为Pt和Ni之间的协同效应和电子效应。在298-318 K温度范围内对乙醇和2-丙醇氧化的温度依赖性研究表明，Pt-Ni/C上乙醇和2-丙醇氧化的表观活化能低于Pt/C。结果还表明，升高温度和进行Ni改性可改善Pt/C上乙醇和2-丙醇的电氧化。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/88ff/9057040/7460c58c3f79/d0ra07331h-f10.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/88ff/9057040/5b14bd5979cf/d0ra07331h-f1.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/88ff/9057040/2e174ad8c612/d0ra07331h-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/88ff/9057040/321ef32a29f1/d0ra07331h-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/88ff/9057040/59920a3f4090/d0ra07331h-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/88ff/9057040/e0bc49ef3cd1/d0ra07331h-f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/88ff/9057040/480e5fdf313f/d0ra07331h-f8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/88ff/9057040/5b1e77bfb835/d0ra07331h-f9.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/88ff/9057040/7460c58c3f79/d0ra07331h-f10.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/88ff/9057040/5b14bd5979cf/d0ra07331h-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/88ff/9057040/291abfc27ab6/d0ra07331h-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/88ff/9057040/9e8f4d0fa851/d0ra07331h-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/88ff/9057040/2e174ad8c612/d0ra07331h-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/88ff/9057040/321ef32a29f1/d0ra07331h-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/88ff/9057040/59920a3f4090/d0ra07331h-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/88ff/9057040/e0bc49ef3cd1/d0ra07331h-f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/88ff/9057040/480e5fdf313f/d0ra07331h-f8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/88ff/9057040/5b1e77bfb835/d0ra07331h-f9.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/88ff/9057040/7460c58c3f79/d0ra07331h-f10.jpg

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