RICE STRAW BIOCHAR AS AN EFFECTIVE SUPPORT FOR Pd NANOPARTICLES IN ETHANOL ELECTRO‐OXIDATION REACTION IN ALKALINE CONDITION

IF 2.6 4区材料科学 Q2 CHEMISTRY, MULTIDISCIPLINARY

ChemNanoMat Pub Date : 2024-09-10 DOI:10.1002/cnma.202400288

Matthew L. Villanueva, Justienne Rei P. Laxamana, Hannah Grace G. Necesito, Jonyl L. Garcia, Bernard John Tongol

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Abstract

Herein, we report the utilization of biochar derived from rice straw (RSB) as an effective support matrix for Pd nanoparticles and its application as an electrocatalyst for ethanol electro‐oxidation (EEO) in an alkaline medium. Rice straw, a common agricultural byproduct, was pyrolyzed at 600 °C, 700 °C, and 800 °C under N2 atmosphere. Pd was loaded onto the RSB via borohydride reduction of Pd2+, with a nominal loading of 20% Pd. Spectroscopic and morphological characterization revealed the formation of dispersed Pd nanoparticles on the RSB surface. Pyrolysis temperature was observed to influence both the porosity of the resulting RSB and the dispersion and degree of exposure of Pd nanoparticles deposited on the surface. Electrochemical characterization revealed that Pd/RSB could be a potential EEO electrocatalyst for direct ethanol fuel cell applications. Pd/RSB‐700 exhibited better performance in terms of EEO forward mass activity (jf) and forward and backward mass activity (jf/jb) ratio relative to Pd/RSB‐600 and Pd/RSB‐800. Moreover, Pd/RSB was shown to be superior to commercial Pd on carbon black in terms of electrochemical stability. This study opens the potential of rice straw biochar as a sustainable and environmentally friendly carbon‐based support matrix for Pd‐based EEO electrocatalysts.

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稻草生物炭作为钯纳米颗粒在烷烃条件下乙醇电氧化反应中的有效支持物

在此，我们报告了如何利用从稻草（RSB）中提取的生物炭作为钯纳米粒子的有效支撑基质，并将其用作碱性介质中乙醇电氧化（EEO）的电催化剂。稻草是一种常见的农副产品，在 600 ℃、700 ℃ 和 800 ℃ 的氮气环境下进行热解。钯通过硼氢化还原 Pd2+ 被负载到 RSB 上，钯的名义负载量为 20%。光谱和形态表征显示，在 RSB 表面形成了分散的 Pd 纳米颗粒。据观察，热解温度既影响所得 RSB 的孔隙率，也影响沉积在表面的 Pd 纳米粒子的分散性和暴露程度。电化学特性分析表明，Pd/RSB 可作为一种潜在的 EEO 电催化剂直接用于乙醇燃料电池。与 Pd/RSB-600 和 Pd/RSB-800 相比，Pd/RSB-700 在 EEO 正向质量活性（jf）和正反向质量活性（jf/jb）比方面表现出更好的性能。此外，就电化学稳定性而言，Pd/RSB 还优于炭黑上的商用钯。这项研究揭示了稻草生物炭作为钯基 EEO 电催化剂的可持续和环保型碳基支撑基质的潜力。

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来源期刊

ChemNanoMat Energy-Energy Engineering and Power Technology

CiteScore

6.10

自引率

2.60%

发文量

236

期刊介绍： ChemNanoMat is a new journal published in close cooperation with the teams of Angewandte Chemie and Advanced Materials, and is the new sister journal to Chemistry—An Asian Journal.