Chemometric Investigation of Platinum Electrodeposition on Titanium Substrates for Ethanol Electro-oxidation

IF 2.7 4区化学 Q3 CHEMISTRY, PHYSICAL Electrocatalysis Pub Date : 2023-03-10 DOI:10.1007/s12678-023-00817-y

João Paulo Tenório da Silva Santos, Sherlan Guimarães Lemos, Murilo Fernando Gromboni, Vinicius Del Colle, Artur José Santos Mascarenhas, Valéria Cristina Fernandes

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Abstract

The objective of this work is to employ chemometric tools to investigate the influence of the synthesis parameters in platinum electrodeposition on a titanium substrate using cyclic voltammetry. Through a 2² factorial design, using as response the maximum peak current density during the ethanol electro-oxidation, one can observe that the number of cycles and the scan rate are both significant, but the interaction between them is not. The maximum peak current density is observed for the electrode obtained with NC = 20 cycles and SR = 200 mV s⁻¹. The structural characterization indicates that the surface irregularity of the substrate causes an uneven growth of the (200) and (220) crystallographic planes, which present different performances in the electro-oxidation of ethanol. The response surface methodology indicates that the best experimental condition is that obtained with 10 cycles and 218 mV s⁻¹. The Pt/Ti electrodes prepared with the optimized parameters are promising.

Graphical Abstract

A 2² factorial design was applied to prepare Pt/Ti for ethanol eletro-oxidation. Pt electrodeposits have shown an atypical “house of cards” morphology. Preferential orientation of Pt on Ti surface are related to better activity. Response surface methodology points 10 cycles at 218 mV s⁻¹ as the best condition.

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钛基上铂电沉积乙醇电氧化的化学计量学研究

本研究的目的是利用循环伏安法，利用化学计量学工具研究钛基上铂电沉积合成参数的影响。通过22因子设计，使用乙醇电氧化过程中的最大峰值电流密度作为响应，可以观察到循环次数和扫描速率都很显著，但它们之间的相互作用并不显著。在NC = 20次循环，SR = 200 mV s−1的条件下，电极的最大峰值电流密度。结构表征表明，衬底表面的不规则性导致(200)和(220)晶面生长不均匀，在乙醇电氧化过程中表现出不同的性能。响应面方法表明，最佳实验条件为10次循环，218mv s−1。用优化后的参数制备的Pt/Ti电极具有良好的应用前景。摘要采用22因子设计制备乙醇电氧化用Pt/Ti。铂电沉积呈非典型的“纸牌屋”形态。Pt在Ti表面的择优取向与较好的活性有关。响应面方法指出，在218 mV s−1下进行10次循环是最佳条件。

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来源期刊

Electrocatalysis CHEMISTRY, PHYSICAL-ELECTROCHEMISTRY

CiteScore

4.80

自引率

6.50%

发文量

审稿时长

>12 weeks

期刊介绍： Electrocatalysis is cross-disciplinary in nature, and attracts the interest of chemists, physicists, biochemists, surface and materials scientists, and engineers. Electrocatalysis provides the unique international forum solely dedicated to the exchange of novel ideas in electrocatalysis for academic, government, and industrial researchers. Quick publication of new results, concepts, and inventions made involving Electrocatalysis stimulates scientific discoveries and breakthroughs, promotes the scientific and engineering concepts that are critical to the development of novel electrochemical technologies. Electrocatalysis publishes original submissions in the form of letters, research papers, review articles, book reviews, and educational papers. Letters are preliminary reports that communicate new and important findings. Regular research papers are complete reports of new results, and their analysis and discussion. Review articles critically and constructively examine development in areas of electrocatalysis that are of broad interest and importance. Educational papers discuss important concepts whose understanding is vital to advances in theoretical and experimental aspects of electrochemical reactions.