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

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 mgPd−1) for Pd/CuO-Ni(OH)2/C was 19.68 times higher than that of commercial Pd/C (0.19 A mgPd−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 OHad adsorption at Ni(OH)2 at a low potential. This journal is © The Royal Society of Chemistry

Авторы
Zhang S. 1 , Pei A.1 , Li G.1, 2 , Zhu L.1, 5, 6 , Li G.1, 2 , Wu F.1 , Lin S. 1 , Chen W.1 , Chen B.H.2 , Luque R. 3, 4
Журнал
Green Chemistry
Издательство
Royal Society of Chemistry
Номер выпуска
6
Язык
Английский
Страницы
2438-2450
Статус
Опубликовано
Ссылка
Внешняя ссылка
DOI
10.1039/D1GC04799J
Том
24
Год
2022
Организации
  • 1 Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry, College of Chemistry and Chemical Engineering, Faculty of Materials Metallurgy and Chemistry, Jiangxi University of Science and Technology, Jiangxi, Ganzhou, 341000, China
  • 2 National Engineering Laboratory for Green Productions of Alcohols-Ethers-Esters, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
  • 3 Departamento de Química Orgánica, Universidad de Córdoba, Campus de Rabanales, Edificio Marie Curie (C-3), Ctra Nnal IV, Km 396, Córdoba, E14071, Spain
  • 4 Peoples Friendship University of Russia (RUDN University), 6 Miklukho Maklaya str., Moscow, 117198, Russian Federation
  • 5 Key Laboratory of Fuel Cell Technology of Guangdong Province, South China University of Technology, Guangzhou, 510640, China
  • 6 Guangdong Provincial Key Lab of Green Chemical Product Technology, South China University of Technology, Guangzhou, 510640, China
Ключевые слова
Carbon black; Catalyst activity; Catalyst selectivity; Electrocatalysis; Ethanol; Fourier transform infrared spectroscopy; Nickel compounds; Nitrogen compounds; Oxidation; % reductions; Efficient catalysts; Electro-catalytic oxidation; Galvanic replacements; Hydrazine hydrate; Peak current density; Replacement strategy; Stable catalysts; Synthesised; ]+ catalyst; Copper oxides
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