Pd/CuO–Ni(OH)2/C as a highly efficient and stable catalyst for the electrocatalytic oxidation of ethanol†

IF 9.2 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Green Chemistry Pub Date : 2022-01-01 DOI:10.1039/d1gc04799j

Sifan Zhang , An Pei , Guang Li , Lihua Zhu , Guoda Li , Fengshun Wu , Shuting Lin , Wenqi Chen , Bing Hui Chen , Rafael Luque

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引用次数: 7

Abstract

A novel-Pd/CuO–Ni(OH)₂/C catalyst utilizing carbon black as a support was successfully synthesized using hydrazine hydrate reduction and galvanic replacement strategies and was subsequently tested for activity in the electrocatalytic oxidation of ethanol. The observed peak current density (3.74 A mg_Pd⁻¹) for Pd/CuO–Ni(OH)₂/C was 19.68 times higher than that of commercial Pd/C (0.19 A mg_Pd⁻¹). The as-synthesized Pd/CuO–Ni(OH)₂/C (hereafter denoted as PdCuNi/C) catalyst exhibited a significantly improved electrocatalytic activity and durability compared with Pd/C, PdNi/C, PdCu/C and the PdCuNi/C catalysts reduced in N₂/H₂ at different temperatures. The reason for this is that the high dispersion of Pd resulted in the exposure of more active sites on the surface of the catalyst. The excellent CO₂ selectivity of Pd/CuO–Ni(OH)₂/C (22.5%) for the ethanol electronic oxidation reaction (EOR) was observed using in situ Fourier transform infrared spectroscopy (FTIR) spectra and could be attributed to the synergistic effect of Pd, CuO and Ni(OH)₂ and the presence of the OH_ad adsorption at Ni(OH)₂ at a low potential.

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Pd/ CuO-Ni (OH)2/C作为乙醇†电催化氧化的高效稳定催化剂

以炭黑为载体，采用水合肼还原和电替换策略成功合成了新型pd / CuO-Ni (OH)2/C催化剂，并对其在乙醇电催化氧化中的活性进行了测试。Pd/ CuO-Ni (OH)2/C的峰值电流密度为3.74 A mgPd−1，是商业Pd/C (0.19 A mgPd−1)的19.68倍。与Pd/C、PdNi/C、PdCu/C以及不同温度下N2/H2还原的PdCuNi/C催化剂相比，合成的Pd/ CuO-Ni (OH)2/C(以下简称PdCuNi/C)催化剂的电催化活性和耐久性均有显著提高。其原因是钯的高分散导致催化剂表面暴露出更多的活性位点。利用原位傅里叶变换红外光谱(FTIR)观察到Pd/CuO - Ni(OH)2/C在乙醇电子氧化反应(EOR)中具有良好的CO2选择性(22.5%)，这可能归因于Pd、CuO和Ni(OH)2的协同作用以及OHad在Ni(OH)2上以低电位吸附的存在。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Green Chemistry 化学-化学综合

CiteScore

16.10

自引率

7.10%

发文量

677

审稿时长

1.4 months

期刊介绍： Green Chemistry is a journal that provides a unique forum for the publication of innovative research on the development of alternative green and sustainable technologies. The scope of Green Chemistry is based on the definition proposed by Anastas and Warner (Green Chemistry: Theory and Practice, P T Anastas and J C Warner, Oxford University Press, Oxford, 1998), which defines green chemistry as the utilisation of a set of principles that reduces or eliminates the use or generation of hazardous substances in the design, manufacture and application of chemical products. Green Chemistry aims to reduce the environmental impact of the chemical enterprise by developing a technology base that is inherently non-toxic to living things and the environment. The journal welcomes submissions on all aspects of research relating to this endeavor and publishes original and significant cutting-edge research that is likely to be of wide general appeal. For a work to be published, it must present a significant advance in green chemistry, including a comparison with existing methods and a demonstration of advantages over those methods.