Journal
NANO RESEARCH
Volume 15, Issue 3, Pages 1934-1941Publisher
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-021-3829-6
Keywords
NiO nanoplates; Pd nanocrystals; synergistic effect; glycerol electro-oxidation reaction; hydrogen evolution reaction
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Funding
- Outstanding Youth Project of Guangdong Natural Science Foundation [2021B1515020051]
- Science and Technology Program of Guangzhou [2019050001]
- Yunnan Expert Workstation [202005AF150028]
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In this study, Pd nanocrystals (Pd-NCs) modified ultrathin NiO nanoplates (NiO-uNPs) hybrids (Pd-NCs/NiO-uNPs) were successfully synthesized, showing excellent electrocatalytic performance for glycerol electro-oxidation reaction (GEOR) and hydrogen evolution reaction (HER). The hybrids require lower voltage in alkaline medium, demonstrating an energy-efficient and economy-competitive synthesis method for the coproduction of glyceraldehyde and hydrogen.
The glycerol electro-oxidation reaction (GEOR) is a green and promising method for the glyceraldehyde production. In this work, Pd nanocrystals (Pd-NCs) modified ultrathin NiO nanoplates (NiO-uNPs) hybrids (Pd-NCs/NiO-uNPs) are successfully synthesized using successive cyanogel hydrolysis, chemical reduction, and calcination treatment methods. Various electrochemical measurements and physicochemical characterization results demonstrate that Pd-NCs/NiO-uNPs hybrids have excellent electrocatalytic performance for both GEOR and hydrogen evolution reaction (HER) in alkaline medium, which benefit from the large specific surface area, uniform distribution of Pd-NCs, and the modified electronic structure of Ni atoms. At Pd-NCs/NiO-uNPs hybrids, only 1.43 V is needed to obtain the current density of 100 mA.cm(-2) for GEOR, much lower than that for oxygen evolution reaction (1.82 V). In addition, Pd-NCs/NiO-uNPs hybrids exhibit better HER performance than commercial Pd/C electrocatalyst. As a result, the constructed Pd-NCs/NiO-uNPs parallel to Pd-NCs/NiO-uNPs glycerol electrolyzer only requires 1.62 V electrolysis voltage to reach 10 mA.cm(-2) current density, showing an energy-efficient and economy-competitive synthesis for the coproduction of glyceraldehyde and hydrogen.
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